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• LoadViewState not fired on my user control

  - by Jeremy

  I have a user control nested in a repeater. Inside my user control I have another repeater and in that I have a panel. I am trying to override the LoadViewState event of my user control and dynamically add controls to the panel. I want to do it in the LoadViewState so that the dynamic controls get added before the viewstate gets loaded, so they retain their values after post backs. For some reason the LoadViewState event on the user control (ascx) is not firing. Is there some way to force it to fire, or is there another method I could use? I have ruled out the user controls repeater databind event, because I need it to work even if data binding isn't happening and I can't do it on the repeaters item created event either because the child panel and inner html doesn't exist yet.

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• C# Web gridview sortin

  - by tommypiaa

  Any examples how would I enable sorting for the gridview? private void loadlist() { cn.Open(); cmd.CommandText = "select Breed, Name, Image from Animals"; dr = cmd.ExecuteReader(); cn.Close(); } protected void TextBox1_TextChanged(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { AddData(); Addimage(); } protected void AddData() { if (TextBox1.Text != "" & TextBox2.Text != "") { cn.Open(); cmd.CommandText = "insert into Animals (Breed, Name) values ('" + TextBox1.Text + "', '" + TextBox2.Text + "')"; cmd.ExecuteNonQuery(); cmd.Clone(); cn.Close(); loadlist(); } } protected void DisplayData() { cn.Open(); cmd.CommandText = "select Breed, Name from Animals"; dr = cmd.ExecuteReader(); GridView1.DataSource = dr; GridView1.DataBind(); cn.Close(); }

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• check compiler with break point

  - by KareemSaad

  When I tried to focus on compiler in code i made break point on code if (!IsPostBack) { using (SqlConnection Con = Connection.GetConnection()) { if (Request.QueryString["Category_Id"] != null && DDlProductFamily.SelectedIndex < 0) { SqlCommand Com = new SqlCommand("SelectAllCtageories_Front", Con); Com.CommandType = CommandType.StoredProcedure; Com.Parameters.Add(Parameter.NewInt("@Category_Id", Request.QueryString["Category_Id"])); SqlDataAdapter DA = new SqlDataAdapter(Com); DA.Fill(dt); DataList1.DataSource = dt; DataList1.DataBind(); } but I cannot check condition although I had the value of query string List item

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• Index out of range, but why?

  - by Stuart

  I have a gridview, and i have a SelectedIndexChanged event on it... protected void GridView1_SelectedIndexChanged(object sender, EventArgs e) { GridViewRow Row = GridView1.SelectedRow; //do some stuff } Then i get an error... Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index I dont understand why, the Gridview is being binded in pageload. but not in post back... if (!IsPostBack) { GridView1.DataSource = UserAccounts; GridView1.DataBind(); }

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• Bind web user control property in markup

  - by Ian Levy

  I'm sure it's elementary but I can't figure it out. This does not work - the the binding expression is passed as string to the control: {<uc:usercontrol runtat="server" message='<%#Me.protectedVariable%>'/>} The code behind include a Page.Databind() call in page_load. But this does work: <uc:usercontrol runat="server" id="usercontrol1"/> And in code behind page_load: usercontrol1.message = Me.protectedVariable Do I have to bind from the code-behind? Is this a page life cycle issue?

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• How to force ListView to show first page programmatically

  - by doekman

  I have a paged ASP.NET ListView. The data shown is filtered, which can be controlled by a form. When the filter form changes, I create a new query, and perform a DataBind. The problem however, when I go to the next page, and set a filter, the ListView shows "No data was returned". That is not weird, because after the filter is applied, there is only one page of data. So what I want to do is reset the pager. Is that a correct solution to the problem? And how do I do that?

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• Unusual conversion error (string to integer) asp.net

  - by Phil

  I have my repeater item template: <ItemTemplate> <tr><td><%#Container.DataItem("Category")%></td></tr> </ItemTemplate> Hooked up to: s = "SQL that works ok on server" x = New SqlCommand(s, c) x.Parameters.Add("@contentid", SqlDbType.Int) x.Parameters("@contentid").Value = contentid c.Open() r = x.ExecuteReader If r.HasRows Then Linksrepeater.DataSource = r Linksrepeater.DataBind() End If c.Close() r.Close() When I run the code I get: Invalid Cast Exception was not handled by user code (Conversion from string "category" to type 'Integer' is not valid.) I'm not sure how / why it is trying to convert "Category" to integer as in the db it is a string. Can you please tell me how to avoid this error? thanks.

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• Refresh a GridView after some event on server

  - by Attilah

  I use a GridView to represent data from a table in my DB. the GridView has some template fields whose content are determined before displaying the Grid ( I use the RowDataBound event to determine content of template fields before displaying the GridView). The page displays a list of records from the table records and then, the recording process starts. after the process is over, the template fields should be updated. how do I automatically refresh the GridView after the process is finished ? it should be noted that the GridView is contained within an control and that I continuously poll the server using a Timer control that executes "GridView1.DataBind()" at the server level every 60 seconds. How can I solve this ?

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• Need help in c# code

  - by vaibhav

  I have a function protected void bindCurrencies(DropDownList drp) { drp.DataSource = dtCurrencies; drp.DataTextField = "CurrencyName"; drp.DataValueField = "CurrencyID"; drp.DataBind(); drp.Items.Insert(0, new ListItem("Please Select")); } I am binding a dropdown list using this. But sometimes I need to bind a ListBox also. I dont want to write a different function for listbox. How should I do this. I think Generics method is to be used here. But I dont have any idea about generics.

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• I want search a item frome database

  - by vishal

  I want search a item frome database bye date and id but if I want to search only by date or id tahn data are display but if I want to search by both date and id than not both are display but combine both and than display. my code: SqlConnection con = new SqlConnection("Data Source=NODE5-PC;Initial Catalog=hans;Persist Security Info=True;User ID=sa;Password=123"); cmd = new SqlCommand("SELECT UserId, Date, Report FROM Daily_Report WHERE (Date='" + txtdate.Text + "' or UserId='" + txtempid.Text + "') OR (UserId='" + txtempid.Text + "' and UserId='" + txtempid.Text + "')", con); con.Open(); SqlDataReader rdr = cmd.ExecuteReader(); GridView2.DataSource = rdr; GridView2.DataBind(); con.Close();

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• dropdownlist's Datavaluefield is not working

  - by Ranjana

  i am getting the datas from database and storing in a collectionobject. The collectionobj contains the Datas 'Name' and 'ID'. My code: <asp:dropdownlist id="dropdown1" runat="server" DataTextField="Name" DataValueField="ID"/> collectionobj=objbs.GetNAmes() for intloop as integer in Collectionobj.Count.Rows-1 dropdown.Items.Add( Collectionobj.Items(intloop).Name) dropdown.DataValueField=Collectionobj.Items(intloop).ID Next dropdown.DataBind() Im getting the Value binded in the dropdown as "Names" . when i select the dropdown i need to pass the respective ID of that name. But when I assign the Dim strid as String=dropdown1.DataValueField The dropdown1.DataValueField is holding the id of last name binded in the dropdown.it is not taking the id which im selecting n the dropdown.. Any suggestion..........

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• Index outof range? Automatica generate field .How to manipulate GridView2.Columns as BoundField;

  - by mike

  Index outof range?GridView2.Columns[6] as BoundField I use Automatica generate field . How to manipulate GridView2.Columns as BoundField with auto-generate feather? JobPostDataContext db = new JobPostDataContext(); var query = from j in db.JobLists join u in db.UserLists on j.UserID equals u.UserID where j.JobTitle.Contains(this.TextBox1.Text) select new { j.JobID, j.JobTitle, j.Summary, j.Details, j.CompanyName, j.CompanyEmail, j.DatePosted, j.UserID, u.City, u.State, u.Country }; GridView2.DataSource = query; GridView2.DataBind(); BoundField DatePosted = GridView2.Columns[6] as BoundField; DatePosted.DataFormatString = "{0:MMM,dd yy}";

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• ASP.NET Cookies

  - by Aamir Hasan

  Cookies are domain specific and cannot be used across different network domains. The only domain that can read a cookie is the domain that sets it. It does not matter what domain name you set.Cookies are used to store small pieces of information on a client machine. A cookie can store only up to 4 KB of information. Generally cookies are used to store data which user types frequently such as user id and password to login to a site.The HttpCookie class defined in the System.Web namespace represents a browser cookie.Creating cookies (C#)Dim cookie As HttpCookie = New HttpCookie("UID")cookie.Value = "id"cookie.Expires = #3/30/2010#Response.Cookies.Add(cookie)cookie = New HttpCookie("username")cookie.Value = "username"cookie.Expires = #3/31/2010#Response.Cookies.Add(cookie)Creating cookies (VB.NET) HttpCookie cookie = Request.Cookies["Preferences"];      if (cookie == null)      {        cookie = new HttpCookie("Preferences");      }      cookie["Name"] = txtName.Text;      cookie.Expires = DateTime.Now.AddYears(1);      Response.Cookies.Add(cookie);Creating cookies (C#)    HttpCookie MyCookie = new HttpCookie("Background");    MyCookie.Value = "value";    Response.Cookies.Add(MyCookie);Reading cookies  (VB.NET)Dim cookieCols As New HttpCookieCollectioncookieCols = Request.CookiesDim str As String' Read and add all cookies to the list boxFor Each str In cookieColsListBox1.Items.Add("Value:" Request.Cookies(str).Value)Next Reading cookies (C#) ArrayList colCookies = new ArrayList();        for (int i = 0; i < Request.Cookies.Count; i++)            colCookies.Add(Request.Cookies[i]);        grdCookies.DataSource = colCookies;        grdCookies.DataBind();Deleting cookies (VB.NET)Dim cookieCols As New HttpCookieCollectioncookieCols = Request.CookiesDim str As String' Read and add all cookies to the list boxRequest.Cookies.Remove("PASS")Request.Cookies.Remove("UID")Deleting cookies (C#)string[] cookies = Request.Cookies.AllKeys;        foreach (string cookie in cookies)        {            ListBox1.Items.Add("Deleting " + cookie);            Response.Cookies[cookie].Expires = DateTime.Now.AddDays(-1);        }

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• MVC data binding

  - by user441521

  I'm using MVC but I've read that MVVM is sort of about data binding and having pure markup in your views that data bind back to the backend via the data-* attributes. I've looked at knockout but it looks pretty low level and I feel like I can make a library that does this and is much easier to use where basically you only need to call 1 javascript function that will data bind your entire page because of the data-* attributes you assign to html elements. The benefits of this (that I see) is that your view is 100% decoupled from your back-end so that a given view never has to be changed if your back-end changes (ie for asp.net people no more razor in your view that makes your view specific to MS). My question would be, I know there is knockout out there but are there any others that provide this data binding functionality for MVC type applications? I don't want to recreate something that may already exist but I want to make something "better" and easier to use than knockout. To give an example of what I mean here is all the code one would need to get data binding in my library. This isn't final but just showing the idea that all you have to do is call 1 javascript function and set some data-* attribute values and everything ties together. Is this worth seeing through? <script> $(function () { // this is all you have to call to make databinding for POST or GET to work DataBind(); }); </script> <form id="addCustomer" data-bind="Customer" data-controller="Home" data-action="CreateCustomer"> Name: <input type="text" data-bind="Name" data-bind-type="text" /> Birthday: <input type="text" data-bind="Birthday" data-bind-type="text" /> Address: <input type="text" data-bind="Address" data-bind-type="text" /> <input type="submit" value="Save" id="btnSave" /> </form> ================================================= // controller action [HttpPost] public string CreateCustomer(Customer customer) { if(customer.Name == "Rick") return "success"; return "failure"; } // model public class Customer { public string Name { get; set; } public DateTime Birthday { get; set; } public string Address { get; set; } }

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• Microsoft Word "Random" Crashes

  - by Bent Rasmussen

  Word seemingly randomly crashes in an application setting where it is first being used to programmatically databind (bookmarks) and then directly afterwards opened on the user machine for further user input. The error message is quite precise but the workaround has eluded me. Word crashes a moment or two after it has been opened on the user machine with the below exception details. Problem signature: Problem Event Name: APPCRASH Application Name: WINWORD.EXE Application Version: 14.0.6129.5000 Application Timestamp: 5082f354 Fault Module Name: wwlib.dll Fault Module Version: 14.0.6129.5000 Fault Module Timestamp: 5082f3dc Exception Code: c0000005 Exception Offset: 000eed32 OS Version: 6.1.7601.2.1.0.16.7 Locale ID: 1030 Additional information about the problem: LCID: 1030 skulcid: 1030 Sometimes one can run the exact same scenario 50 times before experiencing a crash, other times only a few times. We have tried using different versions of the Word format as well as renaming the databound file after saving so that the file being opened on the user machine is different. Principally Word should never crash but perhaps there is some workaround that can make Word not crash. Googling for a solution there appears to be multiple things that can trigger this bug.

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• edit row in gridview

  - by user576998

  Hi.I would like to help me with my code. I have 2 gridviews. In the first gridview the user can choose with a checkbox every row he wants. These rows are transfered in the second gridview. All these my code does them well.Now, I want to edit the quantity column in second gridview to change the value but i don't know what i must write in edit box. Here is my code: using System; using System.Data; using System.Data.SqlClient; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Collections; public partial class ShowLand : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { BindPrimaryGrid(); BindSecondaryGrid(); } } private void BindPrimaryGrid() { string constr = ConfigurationManager.ConnectionStrings["conString"].ConnectionString; string query = "select * from Land"; SqlConnection con = new SqlConnection(constr); SqlDataAdapter sda = new SqlDataAdapter(query, con); DataTable dt = new DataTable(); sda.Fill(dt); gridview2.DataSource = dt; gridview2.DataBind(); } private void GetData() { DataTable dt; if (ViewState["SelectedRecords1"] != null) dt = (DataTable)ViewState["SelectedRecords1"]; else dt = CreateDataTable(); CheckBox chkAll = (CheckBox)gridview2.HeaderRow .Cells[0].FindControl("chkAll"); for (int i = 0; i < gridview2.Rows.Count; i++) { if (chkAll.Checked) { dt = AddRow(gridview2.Rows[i], dt); } else { CheckBox chk = (CheckBox)gridview2.Rows[i] .Cells[0].FindControl("chk"); if (chk.Checked) { dt = AddRow(gridview2.Rows[i], dt); } else { dt = RemoveRow(gridview2.Rows[i], dt); } } } ViewState["SelectedRecords1"] = dt; } private void SetData() { CheckBox chkAll = (CheckBox)gridview2.HeaderRow.Cells[0].FindControl("chkAll"); chkAll.Checked = true; if (ViewState["SelectedRecords1"] != null) { DataTable dt = (DataTable)ViewState["SelectedRecords1"]; for (int i = 0; i < gridview2.Rows.Count; i++) { CheckBox chk = (CheckBox)gridview2.Rows[i].Cells[0].FindControl("chk"); if (chk != null) { DataRow[] dr = dt.Select("id = '" + gridview2.Rows[i].Cells[1].Text + "'"); chk.Checked = dr.Length > 0; if (!chk.Checked) { chkAll.Checked = false; } } } } } private DataTable CreateDataTable() { DataTable dt = new DataTable(); dt.Columns.Add("id"); dt.Columns.Add("name"); dt.Columns.Add("price"); dt.Columns.Add("quantity"); dt.Columns.Add("total"); dt.AcceptChanges(); return dt; } private DataTable AddRow(GridViewRow gvRow, DataTable dt) { DataRow[] dr = dt.Select("id = '" + gvRow.Cells[1].Text + "'"); if (dr.Length <= 0) { dt.Rows.Add(); dt.Rows[dt.Rows.Count - 1]["id"] = gvRow.Cells[1].Text; dt.Rows[dt.Rows.Count - 1]["name"] = gvRow.Cells[2].Text; dt.Rows[dt.Rows.Count - 1]["price"] = gvRow.Cells[3].Text; dt.Rows[dt.Rows.Count - 1]["quantity"] = gvRow.Cells[4].Text; dt.Rows[dt.Rows.Count - 1]["total"] = gvRow.Cells[5].Text; dt.AcceptChanges(); } return dt; } private DataTable RemoveRow(GridViewRow gvRow, DataTable dt) { DataRow[] dr = dt.Select("id = '" + gvRow.Cells[1].Text + "'"); if (dr.Length > 0) { dt.Rows.Remove(dr[0]); dt.AcceptChanges(); } return dt; } protected void CheckBox_CheckChanged(object sender, EventArgs e) { GetData(); SetData(); BindSecondaryGrid(); } private void BindSecondaryGrid() { DataTable dt = (DataTable)ViewState["SelectedRecords1"]; gridview3.DataSource = dt; gridview3.DataBind(); } } and the source code is <asp:GridView ID="gridview2" runat="server" AutoGenerateColumns="False" DataKeyNames="id" DataSourceID="SqlDataSource5"> <Columns> <asp:TemplateField> <HeaderTemplate> <asp:CheckBox ID="chkAll" runat="server" onclick = "checkAll(this);" AutoPostBack = "true" OnCheckedChanged = "CheckBox_CheckChanged"/> </HeaderTemplate> <ItemTemplate> <asp:CheckBox ID="chk" runat="server" onclick = "Check_Click(this)" AutoPostBack = "true" OnCheckedChanged = "CheckBox_CheckChanged" /> </ItemTemplate> </asp:TemplateField> <asp:BoundField DataField="id" HeaderText="id" InsertVisible="False" ReadOnly="True" SortExpression="id" /> <asp:BoundField DataField="name" HeaderText="name" SortExpression="name" /> <asp:BoundField DataField="price" HeaderText="price" SortExpression="price" /> <asp:BoundField DataField="quantity" HeaderText="quantity" SortExpression="quantity" /> <asp:BoundField DataField="total" HeaderText="total" SortExpression="total" /> </Columns> </asp:GridView> <asp:SqlDataSource ID="SqlDataSource5" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>" SelectCommand="SELECT * FROM [Land]"></asp:SqlDataSource> <br /> </div> <div> <asp:GridView ID="gridview3" runat="server" AutoGenerateColumns = "False" DataKeyNames="id" EmptyDataText = "No Records Selected" > <Columns> <asp:BoundField DataField = "id" HeaderText = "id" /> <asp:BoundField DataField = "name" HeaderText = "name" ReadOnly="True" /> <asp:BoundField DataField = "price" HeaderText = "price" DataFormatString="{0:c}" ReadOnly="True" /> <asp:TemplateField HeaderText="quantity"> <EditItemTemplate> <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("quantity")%>'</asp:TextBox> </EditItemTemplate> <ItemTemplate> <asp:Label ID="Label1" runat="server" Text='<%# Bind("quantity") %>'></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:BoundField DataField = "total" HeaderText = "total" DataFormatString="{0:c}" ReadOnly="True" /> <asp:CommandField ShowEditButton="True" /> </Columns> </asp:GridView> <asp:Label ID="totalLabel" runat="server"></asp:Label> <br /> </div> </form> </body> </html>

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• export data from WCF Service to excel

  - by Dave

  I need to provide an export to excel feature for a large amount of data returned from a WCF web service. The code to load the datalist is as below: List<resultSet> r = myObject.ReturnResultSet(myWebRequestUrl); //call to WCF service myDataList.DataSource = r; myDataList.DataBind(); I am using the Reponse object to do the job: Response.Clear(); Response.Buffer = true; Response.ContentType = "application/vnd.ms-excel"; Response.AddHeader("Content-Disposition", "attachment; filename=MyExcel.xls"); StringBuilder sb = new StringBuilder(); StringWriter sw = new StringWriter(sb); HtmlTextWriter tw = new HtmlTextWriter(sw); myDataList.RenderControl(tw); Response.Write(sb.ToString()); Response.End(); The problem is that WCF Service times out for large amount of data (about 5000 rows) and the result set is null. When I debug the service, I can see the window for saving/opening the excel sheet appear before the service returns the result and hence the excel sheet is always empty. Please help me figure this out.

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• Linq The specified type 'string' is not a valid provider type.

  - by Joe Pitz

  Using Linq to call a stored procedure that passes a single string, The stored procedure returns a data set row that contains a string and an int. Code: PESQLDataContext pe = new PESQLDataContext(strConnStr); pe.ObjectTrackingEnabled = false; gvUnitsPassed.DataSource = pe.PassedInspection(Line); gvUnitsPassed.DataBind(); pe.dispose(); When the code runs an exception gets called below: The exception is thrown at the IExecuteResult result = statement: Enclosed is my result class in the designer.cs file. [Function(Name = "dbo.PassedInspection")] public ISingleResult<PassedInspectionResult> PassedInspection([Parameter(Name = "Model", DbType = "VarChar(4)")] string model) { IExecuteResult result = this.ExecuteMethodCall(this, ((MethodInfo)(MethodInfo.GetCurrentMethod())), model); return ((ISingleResult<PassedInspectionResult>)(result.ReturnValue)); } public partial class PassedInspectionResult { private string _Date; private int _Passed; public PassedInspectionResult() { } [Column(Storage = "_Date", DbType = "string NULL")] public string Date { get { return this._Date; } set { if ((this._Date != value)) { this._Date = value; } } } [Column(Storage = "_Passed", DbType = "Int NULL")] public int Passed { get { return this._Passed; } set { if ((this._Passed != value)) { this._Passed = value; } } } } } I have other stored procedures with similar arguments that run just fine. Thanks

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• System.Net.WebException: The remote server returned an error: (405) Method Not Allowed .exception occurred during the execution of the web request

  - by user88

  When I ran my web application code I got this error on this line. using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()){} Actually when I ran my url directly on browser.It will give proper o/p but when I ran my url in code. It will give exception. Here MyCode is :- string service = "http://api.ean.com/ean-services/rs/hotel/"; string version = "v3/"; string method = "info/"; string hotelId1 = "188603"; int hotelId = Convert.ToInt32(hotelId1); string otherElemntsStr = "&cid=411931&minorRev=[12]&customerUserAgent=[hotel]&locale=en_US&currencyCode=INR"; string apiKey = "tzyw4x2zspckjayrbjekb397"; string sig = "a6f828b696ae6a9f7c742b34538259b0"; string url = service + version + method + "?&type=xml" + "&apiKey=" + apiKey + "&sig=" + sig + otherElemntsStr + "&hotelId=" + hotelId; HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url) as HttpWebRequest; request.Method = "POST"; request.ContentType = "text/xml"; request.ContentLength = 0; XmlDocument xmldoc = new XmlDocument(); using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) { StreamReader responsereader = new StreamReader(response.GetResponseStream()); var responsedata = responsereader.ReadToEnd(); xmldoc = (XmlDocument)JsonConvert.DeserializeXmlNode(responsedata); xmldoc.Save(@"D:\FlightSearch\myfile.xml"); xmldoc.Load(@"D:\FlightSearch\myfile.xml"); DataSet ds = new DataSet(); ds.ReadXml(Request.PhysicalApplicationPath + "myfile.xml"); GridView1.DataSource = ds.Tables["HotelSummary"]; GridView1.DataBind(); }

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• C# - Fill a combo box with a DataTable

  - by MrG

  I'm used to work with Java where large amounts of examples are available. For various reasons I had to switch to C# and trying to do the following in SharpDevelop: // Form has a menu containing a combobox added via SharpDevelop's GUI // --- Variables languages = new string[2]; languages[0] = "English"; languages[1] = "German"; DataSet myDataSet = new DataSet(); // --- Preparation DataTable lTable = new DataTable("Lang"); DataColumn lName = new DataColumn("Language", typeof(string)); lTable.Columns.Add( lName ); for( int i=0; i<languages.Length; i++ ) { DataRow lLang = lTable.NewRow(); lLang["Language"] = languages[i]; lTable.Rows.Add(lLang); } myDataSet.Tables.Add(lTable); // --- Handling the combobox mnuActionLanguage.ComboBox.DataSource = myDataSet.Tables["Lang"].DefaultView; mnuActionLanguage.ComboBox.DisplayMember = "Language"; One would assume to see some values in the dropdown, but it's empty. Please tell me what I'm doing wrong ;( EDIT: mnuActionLanguage.ComboBox.DataBind() is what I also found on the net, but it doesn't work in my case. SOLUTION mnuActionLanguage.ComboBox.BindingContext = this.BindingContext; at the end solved the problem!

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• iTextSharp error - cannot convert type 'Collections.Generic.List' to 'iTextSharp.text.Element'

  - by mike

  I am trying to export pdf file using aspx and c#. I got the following error. Cannot implicitly convert type 'System.Collections.Generic.List'' to 'iTextSharp.text.Element' I have the following code using iTextSharp.text; using iTextSharp.text.pdf; using iTextSharp.text.html.simpleparser; StringBuilder strB = new StringBuilder(); document.Open(); if (text.Length.Equals(0))//export the text { GridView1.DataBind(); using (StringWriter sWriter = new StringWriter(strB)) { using (HtmlTextWriter htWriter = new HtmlTextWriter(sWriter)) { GridView1.RenderControl(htWriter); } } } else //export the grid { strB.Append(text); } using (TextReader sReader = new StringReader(strB.ToString())) { StyleSheet styles = new StyleSheet(); List<Element> list = new List<Element>(); list = HTMLWorker.ParseToList(sReader, styles); foreach (IElement elm in list) { document.Add(elm); } } I got the error in this line: list = HTMLWorker.ParseToList(sReader, styles); It's the first time that I am trying to export pdf files. I tried to cast the list element , however this did not solve my error. Any advice would be helpful!!!

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• problem with radgrid in pageindexchange event

  - by user203127

  Hi, I Have radgrid in my page. When i turn off view state and in pageindexchanged event when click next page i am getting nothing. Simply a blank page. But when i turn on view state I am getting data in next pages. Is there any way to get the data. I cant turn on the view state due to performance issue. Please see the code below for the reference. .aspx <telerik:RadGrid ID="RadGrid1" OnSortCommand="RadGrid1_SortCommand" OnPageIndexChanged="RadGrid1_PageIndexChanged" AllowSorting="True" PageSize="20" ShowGroupPanel="True" AllowPaging="True" AllowMultiRowSelection="True" AllowFilteringByColumn="true" AutoGenerateColumns="false" EnableViewState="false" runat="server" GridLines="None" OnItemUpdated="RadGrid1_ItemUpdated" OnDataBound="RadGrid1_DataBound"> aspx.cs public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { LoadData(); } private void LoadData() { SqlConnection SqlConn = new SqlConnection("uid=tempuser;password=tempuser;data source=USWASHL10015\\SQLEXPRESS;database=CCOM;"); SqlCommand cmd = new SqlCommand(); cmd.Connection = SqlConn; cmd.CommandType = CommandType.StoredProcedure; cmd.CommandText = "usp_testing"; SqlDataAdapter da = new SqlDataAdapter(cmd); DataSet ds = new DataSet(); da.Fill(ds); RadGrid1.DataSource = ds; RadGrid1.DataBind(); //RadGrid1.ClientSettings.AllowDragToGroup = true; } protected void RadGrid1_PageIndexChanged(object source, Telerik.Web.UI.GridPageChangedEventArgs e) { //RadGrid1.Rebind(); LoadData(); }

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• ASP.net DAL DatasSet and Table Adapter not in namespace - Northwind Tutorial

  - by Alan

  I've been attempting to walk through the "Creating a Data Access Layer" tutorial found http://www.asp.net/learn/data-access/tutorial-01-cs.aspx I create the DB connection, create the typed dataset and table adapter, specify the sql, etc. When I add the code to the presentation layer (in this case a page called AllProducts.aspx) I am unable to find the NorthwindTableAdapters.ProductsTableAdapter class. I tried to import the NorthwindTableAdapters namespace, but it is not showing up. Looking in the solution explorer Class View confirms that there is a Northwind class, but not the namespace I'm looking for. I've tried several online tutorials that all have essentially the same steps, and I'm getting the same results. Can anyone give me a push in the right direction? I'm getting error: Namespace or type specified in the Imports 'NorthwindTableAdapters' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. I think I might need to add a reference OR they may be creating a separate class and importing it into their main project. If that's the case, the tutorials do not mention this. SuppliersTest2.aspx.vb: Imports NorthwindTableAdapters Partial Class SuppliersTest2 Inherits System.Web.UI.Page Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim suppliersAdapter As New SuppliersTableAdapter GridView1.DataSource = suppliersAdapter.GetAllSuppliers() GridView1.DataBind() End Sub End Class

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• GridView doesn't remember state between postbacks

  - by Ryan

  Hi, I have a simple ASP page with databound grid (bound to an object source). The grid is within the page of a wizard and has a 'select' checkbox for each row. In one stage of the wizard, I bind the GridView: protected void Wizard1_NextButtonClick(object sender, WizardNavigationEventArgs e) { ... // Bind and display matches GridViewMatches.EnableViewState = true; GridViewMatches.DataSource = getEmailRecipients(); GridViewMatches.DataBind(); And when the finish button is clicked, I iterate through the rows and check what's selected: protected void Wizard1_FinishButtonClick(object sender, WizardNavigationEventArgs e) { // Set the selected values, depending on the checkboxes on the grid. foreach (GridViewRow gr in GridViewMatches.Rows) { Int32 personID = Convert.ToInt32(gr.Cells[0].Text); CheckBox selected = (CheckBox) gr.Cells[1].FindControl("CheckBoxSelectedToSend"); But at this stage GridViewMatches.Rows.Count = 0! I don't re-bind the grid, I shouldn't need to, right? I expect the view-state to maintain the state. (Also, if I do rebind the grid, my selection checkboxes will be cleared) NB: This page also dynamically adds user controls in OnInit method. I have heard that it might mess with the view state, but as far as I can tell, I am doing it correctly and the viewstate for those added controls seems to work (values are persisted between postbacks) Thanks a lot in advance for any help! Ryan UPDATE: Could this be to do with the fact I am setting the datasource programatically? I wondered if the asp engine was databinding the grid during the page lifecycle to a datasource that was not yet defined. (In a test page, the GridView is 'automatically' databound'. I don't want the grid to re-bound I just want the values from the viewstate from the previous post! Also, I have this in the asp header: ViewStateEncryptionMode="Never" - this was to resolve an occasional 'Invalid Viewstate Validation MAC' message Thanks again Ryan

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• MS Chart in WPF, Setting the DataSource is not creating the Series

  - by Shaik Phakeer

  Hi All, Here I am trying to assign the datasource (using same code given in the sample application) and create a graph, only difference is i am doing it in WPF WindowsFormsHost. due to some reason the datasource is not being assigned properly and i am not able to see the series ("Series 1") being created. wired thing is that it is working in the Windows Forms application but not in the WPF one. am i missing something and can somebody help me? Thanks <Window x:Class="SEDC.MDM.WinUI.WindowsFormsHostWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:wf="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms" xmlns:CHR="clr- namespace:System.Windows.Forms.DataVisualization.Charting;assembly=System.Windows.Forms.Dat aVisualization" Title="HostingWfInWpf" Height="230" Width="338"> <Grid x:Name="grid1"> </Grid> </Window> private void drawChartDataBinding() { System.Windows.Forms.Integration.WindowsFormsHost host = new System.Windows.Forms.Integration.WindowsFormsHost(); string fileNameString = @"C:\Users\Shaik\MSChart\WinSamples\WinSamples\data\chartdata.mdb"; // initialize a connection string string myConnectionString = "PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileNameString; // define the database query string mySelectQuery = "SELECT * FROM REPS;"; // create a database connection object using the connection string OleDbConnection myConnection = new OleDbConnection(myConnectionString); // create a database command on the connection using query OleDbCommand myCommand = new OleDbCommand(mySelectQuery, myConnection); Chart Chart1 = new Chart(); // set chart data source Chart1.DataSource = myCommand; // set series members names for the X and Y values Chart1.Series"Series 1".XValueMember = "Name"; Chart1.Series"Series 1".YValueMembers = "Sales"; // data bind to the selected data source Chart1.DataBind(); myCommand.Dispose(); myConnection.Close(); host.Child = Chart1; this.grid1.Children.Add(host); } Shaik

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