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  • is it possible to lock oracle 10g database table with C#/(ADO?).NET 2.0

    - by matti
    I have a table that contains a maximum value that needs to be get and set by multiple programs. How can I lock the table for a while when old value is got and new is updated in C#? In other words: string sql = "lock table MaxValueTable in exclusive mode"; using (DbCommand cmd = cnctn.CreateCommand()) { cmd.CommandText = sql; // execute command somehow!! } maxValue = GetMaxValue(); SetMaxValue(maxValue + X); sql = "lock table MaxValueTable in share mode"; using (DbCommand cmd = cnctn.CreateCommand()) { cmd.CommandText = sql; // execute command somehow!! } -BR: Matti

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  • How to bind grid in ASP.NET?

    - by Abid Ali
    I cant bind my Grid. I dont know what I am doing wrong, the grid appears empty when I run the program. here is my code :: protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) this.BindGrid(this.GridView1); } private void BindGrid(GridView grid) { SqlCommand cmd = new SqlCommand("Select * from Person", cn); SqlDataAdapter da = new SqlDataAdapter(cmd); DataTable dt = new DataTable(); da.Fill(dt); grid.DataSource = dt; grid.DataBind(); } <body> <form id="form1" runat="server"> <div style="margin-left: 240px"> <asp:GridView ID="GridView1" runat="server" CellPadding="4" ForeColor="#333333" GridLines="None" Width="856px" AutoGenerateColumns = "false" ShowFooter = "true" ShowHeader="true" BorderStyle="Groove" CaptionAlign="Top" HorizontalAlign="Center" onrowdatabound="GridView1_RowDataBound" > <RowStyle BackColor="#F7F6F3" ForeColor="#333333" /> <Columns> <asp:BoundField HeaderText="ID" /> <asp:BoundField HeaderText="First Name" /> <asp:BoundField HeaderText="Last Name" /> <asp:BoundField HeaderText="Home Phone #" /> <asp:BoundField HeaderText="Cell #" /> <asp:BoundField HeaderText="Email Address" /> <asp:BoundField HeaderText="NIC #" /> <asp:TemplateField HeaderText="Action"> <ItemTemplate> <asp:Button ID="Button1" runat="server" Text="Button" /> <asp:Button ID="Button2" runat="server" Text="Button" /> </ItemTemplate> </asp:TemplateField> </Columns> <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" /> <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" /> <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" /> <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" /> <EditRowStyle BackColor="#999999" /> <AlternatingRowStyle BackColor="White" ForeColor="#284775" /> </asp:GridView> </div> </form> </body>

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  • ASP.NET MVC: Posting JSON to Controller

    - by JamesBrownIsDead
    I've got this in my controller: [HttpPost] public void UpdateLanguagePreference(string languageTag) { if (string.IsNullOrEmpty(languageTag)) { throw new ArgumentNullException("languageTag"); } ... } And have this jQuery code POSTing to the controller: jQuery.ajax({ type: 'POST', url: '/Config/UpdateLanguagePreference', contentType: 'application/json; charset=utf-8', data: '{ "languageTag": "' + selectedLanguage + '" }' }); When I try to the code, however, I get the error: Server Error in '/' Application. Value cannot be null. Parameter name: languageTag What's the problem? Isn't this how to POST JSON to an MVC Controller? I can examine the POST using Fiddler and see that the request is correct. For some reason, UpdateLanguagePreference() is getting a null or empty string.

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  • Strongly Typed Controls in .NET

    - by Tigraine
    I am working on a Windows Forms app for quite some time now, and I really find myself doing more typecasts in the GUI code than I ever did in my underlying business code. What I mean becomes apparent if you watch the ComboBox control that accepts some vague "object" as it's item. Then you go off and may display some DisplayMember and a ValueMember and so on. If I want to retrieve that value later I need to typecast my object back to what it was. Like with strings getting the value takes string value = (string)combobox1.SelectedItem; Since there are generics in the Framework for quite some time now, I still wonder why in the Hell not one control from the standard toolbox is generic. I also find myself using the .Tag property on ListViewItems all the time to keep the displayed domain object. But everytime I need to access that object I then need another typecast. Why cant I just create a ComboBox or ListView with items of type ListViewItem Am I missing something here or is this just another example of not perfectly well thought through controls?

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  • ASP.NET declare a CSS stylesheet one time only

    - by Grant
    Hi, if i have a single CSS stylesheet for a website and only want to declare it once, that is, not use the following code on every aspx page.. <link href="stylesheets/general.css" rel="stylesheet" type="text/css" /> Am i forced to use a .master page? or is there another way to do this..

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  • asp.net C# uploading big file and processing it

    - by JewelThief
    I want to be able to upload file from my .aspx page to my web server so that it can be preocessed into a different format. e.g. user will upload a doc and in few seconds it would see a pdf version of the doc on the web page. I have web service available which can convert doc to pdf. now 1- how do i automate upload + conversion process. 2- how do i handle big files here. 3- how not to make user wait for all this thing to happen.

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  • How to Select Multiple Records from Multiple Tables at Once - SQL Server/C#/.NET/T-SQL

    - by peace
    I have two tables Customer and CustomerPhone. Customer usually has multiple phone numbers, so when i run select statement on customer 101, i will get multiple records due to the multiple phone numbers. As you see below all the "Phone" and "Fax" field belongs to CustomerPhone table. These are considered as two records in the CustomerPhone table whereas the rest of fields relate to Customer table which is a single record. What should i do to fill Phone and Fax field in this case? Should i run select statement on CustomerPhone first and then run select statement on Customer?

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  • ASP .net MVC Jqgrid data binding

    - by SARAVAN
    Hi, I am using a jqgrid with a column named 'Comments'. My controller code returns data as follows: var jsonData = new { rows= .... .... select new { col1.... col2.... Comments = _Model.GetComments(id), }) ....... ..... return Json(jsonData, JsonRequestBehavior.AllowGet); } _Model.GetComments(id) will return a ClientComments Object which has a few properties say CommentID, FirstName, MiddleName etc., which will be bound to each row in the grid Now in my jqgrid I need to build a tool tip based on Comments column properties and for that I need to use the properties of my Comments in JQGrid for each row. May I know How I can manipulate Comment's properties for each row? Any help would be appreciated. I tried in my javascript that for each row rowObject.Comments.FirstName and it did not work.

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  • vb.net array for slideshow button

    - by StealthRT
    Hey all, i am in the middle of trying to figure out how to go about doing this... I have a form that i call like so: call frmSlideShow.showWhat(1,4,8,9,11,22) Each of the numbers represents a different image slide (slide1.png, slide4.png, etc..). The problem i am having is trying to create a "previous" and "next" button to flip through them all. Trying to figure out what number the user is on and going from there and seeing what numbers are still left from the list above that was sent, etc. If anyone has an idea how i would go about doing that then that would be awesome! :) David

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  • COM port - how to identify a device (.net/c#)

    - by argh
    Hi, I'm programming for Windows CE and I need to connect to a scanner. There is no problem - I know that it is on port COM0, but if I plug in another device earlier it gets another COM port... to get all com ports the easy way is: SerialPort.GetPortNames() But I don't know how to identify a device? Is there any standard way? I can't 'ping' it since there is one device that only sends data... it spams data all the time... and I don't know how to 'ping' a device...

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  • how to make the printer window appear using vb.net 2010

    - by Jeline Esase
    hi I have this code that will send my panel into a printer but the problem is it doesent let me choose which printer I will use any idea on how can I make the printer window appear? thanks Public Class Form1 Dim img As Bitmap Dim WithEvents pd As PrintDocument 'Returns the Form as a bitmap Function CaptureForm1() As Bitmap Dim g1 As Graphics = Me.CreateGraphics() Dim MyImage = New Bitmap(Me.ClientRectangle.Width, (Me.ClientRectangle.Height), g1) Dim g2 As Graphics = Graphics.FromImage(MyImage) Dim dc1 As IntPtr = g1.GetHdc() Dim dc2 As IntPtr = g2.GetHdc() BitBlt(dc2, 0, 0, Me.ClientRectangle.Width, (Me.ClientRectangle.Height), dc1, 0, 0, 13369376) g1.ReleaseHdc(dc1) g2.ReleaseHdc(dc2) 'saves image to c drive just, u can comment it also 'MyImage.Save("c:\abc.bmp") Return MyImage End Function <DllImport("gdi32.DLL", EntryPoint:="BitBlt", _ SetLastError:=True, CharSet:=CharSet.Unicode, _ ExactSpelling:=True, _ CallingConvention:=CallingConvention.StdCall)> _ Private Shared Function BitBlt(ByVal hdcDest As IntPtr, ByVal nXDest As Integer, ByVal nYDest As Integer, ByVal nWidth As Integer, ByVal nHeight As Integer, ByVal hdcSrc As IntPtr, ByVal nXSrc As Integer, ByVal nYSrc As Integer, ByVal dwRop As System.Int32) As Boolean ' Leave function empty - DLLImport attribute forwards calls to MoveFile to ' MoveFileW in KERNEL32.DLL. End Function Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click img = CaptureForm1() pd = New PrintDocument pd.Print() End Sub 'this method will be called each time when pd.printpage event occurs Sub pd_PrintPage(ByVal sender As Object, ByVal e As PrintPageEventArgs) Handles pd.PrintPage Dim x As Integer = e.MarginBounds.X Dim y As Integer = e.MarginBounds.Y e.Graphics.DrawImage(img, x, y) e.HasMorePages = False End Sub End Class

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  • Export data as Excel file from ASP.NET

    - by Yongwei Xing
    Hi all I have data like below AAAAAA BBBBBB CCCCCC DDDDDD EEEEEE Now there is button on the page,when I click the button, the browser would download a excel file with the data above, and stay current page. Is there any simple way to do it? The data is very simple. only one column, and not huge. Best Regards,

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  • vb.net -- Using arraylist as key in dictionary

    - by Zahid
    Dim dct As New Dictionary(Of ArrayList, ArrayList) ' Populate Dictionary dct.Add(New ArrayList({"Dot", "0"}), New ArrayList({20, 30, 40, 50})) dct.Add(New ArrayList({"Dot", "1"}), New ArrayList({120, 130, 140, 150})) ' Search in dictionary Dim al As New ArrayList({"Dot", "2"}) If dct.ContainsKey(al) Then *' does not work* MessageBox.Show("Found: " & al(0).ToString) End If

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  • I want to display a Blank Gridview in asp.net

    - by Vibin Jith
    I want to display a blank Gridview Like this.By this way iant to enter the details through grid like windows app. In first a grid with blank row which is in edit mode comes and after update Next row will come. how can i do this? Any logic. I created the itemtemplates but without a data Source it does not showing nothng.

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  • Jquery Asp.net button disable

    - by oraclee
    Hi all; html code: <asp:Button runat="server" ID="btnTest" Text="Test" OnClick="btnTest_Click" /> Jquery Code: $('[id$=btnTest]').click(function(){ $('[id$=btnTest]').attr('disabled', 'true'); }); CodeBehind: protected void btnTest_Click(object sender, EventArgs e) { //here not come. } Code Behind btnTest event not work ?

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  • Hitting a memory limit slows down the .Net application

    - by derdo
    We have a 64bit C#/.Net3.0 application that runs on a 64bit Windows server. From time to time the app can use large amount of memory which is available. In some instances the application stops allocating additional memory and slows down significantly (500+ times slower).When I check the memory from the task manager the amount of the memory used barely changes. The application keeps on running very slowly and never gives an out of memory exception. Any ideas? Let me know if more data is needed.

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  • Please Help me to create a replace function in vb.net

    - by Rajesh Rolen- DotNet Developer
    Please Help me in creating a replace function. Problem: Their is a alfanumeric value of any lenght (string) and i want to replace its all characters with 'X' except right four characters Like : Value : 4111111111111111 Result Should be: XXXXXXXXXXXX1111 I have created a function but got stuck: public function myfunction(str as string) str.Replace(str.Substring(0, str.Length - 5), 'X') 'but here i want no of x to be equvals to count of lenght of str - 4 end function please tell me a better fuction to perform such a operation

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  • Fill ComboBox Dynamically in asp.net.. help required

    - by Abid Ali
    The Scenario which i have thought and which i want to do is that I have 2 combo boxes.. One of Country and One of Cities.. On Page Load, Country Combo box must be filled with the corresponding values present in the Database and at that time My Cities Combo box should be hidden.. By selecting the Country from the Filled Country Combo Box, the hidden Combo Box that is the Cities Combo Box visible to true and filled with those cities that the user selected the country from the country combo box... Can any one help me with that?

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  • .NET Splash screen issues

    - by CODe
    I have a splash screen for my C# database application that is called via the Shown event. The splash screen contains some information that is preprocessed when the main form's constructor is called, hence why I'm using the Shown event, because that information should be available. However, when the splash screen is shown, the main form is whited out, and the menu bar, bottom menu bar, and even the gray background are all white and invisible. It looks like the program is hanging, but after the 5 second delay I have built in, the banner goes away and the program is shown normally. Also, on the banner, I have labels that are not shown when the splash screen displays... Here is my code, some reasoning behind why it isn't working would help greatly. SPLASH SCREEN CODE : public partial class StartupBanner : Form { public StartupBanner(int missingNum, int expiredNum) { InitializeComponent(); missingLabel.Text = missingNum.ToString() + " MISSING POLICIES"; expiredLabel.Text = expiredNum.ToString() + " EXPIRED POLICIES"; } } CALLING CODE : private void MainForm_Shown(object sender, EventArgs e) { StartupBanner startup = new StartupBanner(missingPoliciesNum, expiredPoliciesNum); startup.MdiParent = this; startup.Show(); Thread.Sleep(5000); startup.Close(); } Using startup.ShowDialog() shows the correct label information on the splash screen, but that locks up the application, and I need the splash to go away after about 5 seconds, which is why it's a splash. ;)

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  • Please Explain .NET Delegates

    - by user275561
    So I read MSDN and Stack Overflow. I understand what the Action Delegate does in general but it is not clicking no matter how many examples I do. In general, the same goes for the idea of delegates. So here is my question. When you have a function like this: public GetCustomers(Action<IEnumerable<Customer>,Exception> callBack) { } What is this, and what should I pass to it?

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  • ASP.net Repeater Control Problem (nothing outputted from datasource(sqldatareader))

    - by Phil
    I have the following code to get the repeaters' data in my usercontrol (content.ascx.vb): If did = 0 Then s = "select etc (statement works on server)" x = New SqlCommand(s, c) x.Parameters.Add("@contentid", Data.SqlDbType.Int) x.Parameters("@contentid").Value = contentid c.Open() r = x.ExecuteReader If r.HasRows Then Contactinforepeater.DataSource = r End If c.Close() r.Close() Else s = "select etc (statement works on server)" x = New SqlCommand(s, c) x.Parameters.Add("@contentid", SqlDbType.Int) x.Parameters("@contentid").Value = contentid x.Parameters.Add("@did", SqlDbType.Int) x.Parameters("@did").Value = did c.Open() r = x.ExecuteReader If r.HasRows Then Contactinforepeater.DataSource = r c.Close() r.Close() End If End If Then I have the following repeater control markup in my usercontrol (content.ascx): <asp:Repeater ID="Contactinforepeater" runat="server"> <HeaderTemplate> <h1>Contact Information</h1> </HeaderTemplate> <ItemTemplate> <table width="50%"> <tr> <td colspan="2"><%#Container.DataItem("position")%></td> </tr> <tr> <td>Name:</td> <td><%#Container.DataItem("surname")%></td> </tr> <tr> <td>Telephone:</td> <td><%#Container.DataItem("telephone")%></td> </tr> <tr> <td>Fax:</td> <td><%#Container.DataItem("fax")%></td> </tr> <tr> <td>Email:</td> <td><%#Container.DataItem("email")%></td> </tr> </table> </ItemTemplate> <SeparatorTemplate><br /><hr /><br /></SeparatorTemplate> </asp:Repeater> When I insert this usercontrol into default.aspx with this code: <%@ Register src="Modules/Content.ascx" tagname="Content" tagprefix="uc1" %> and <form id="form1" runat="server"> <div> <uc1:Content ID="Content" runat="server" /> </div> </form> I do not get any error messages but the expected content from the database is not displayed. Can someone please show me the syntax to get this working or point out where I am going wrong? Thanks in advance!

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  • Need help with this Regex + UrlRewriter.NET please :)

    - by Pure.Krome
    Previously, on StackOverflow ... (Summarized) I need to capture all requests, for a particluar subdomain .. and rewrite their destination. Now, the trick to determining the host via regex was solved. Now, i need to make sure all requests to the root index page is rewritten, but i can't figure out the correct regex to find the 'homepage' / website root. this is what i have.... <if header="HTTP_HOST" match="^foo\.mydomain\.com\.au(?::\d+)?/?$"> <!-- snip some other rewrites, eg./buying/product -> ~/Pages/Foo/Bar.aspx --> <rewrite url="^/$" to="~/Pages/SomeWeirdFolder/Home.aspx" processing="stop"/> </if> Now if one of the rewrites were not found, then it falls through and continues. So .. can anyone please help?

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  • asp.net mvc custom routes with multiple submit buttons

    - by dangerisgo
    So I have a custom route as such: routes.MapRoute( "Wizard", // Route name "Wizard/{page}", // URL with parameters new { controller = "Wizard", action = "Index" } // Parameter defaults ); and have the following on my View: <% Html.BeginForm("Continue", "Wizard"); %> <input type="submit" value="Continue" name="Continue" /> <% Html.EndForm(); %> In which I want to call this function: [AcceptVerbs(HttpVerbs.Post)] public ActionResult Continue(string Number, string Rev) { (...) } but in turn when that button is pressed always calls the postback Index rather than the one I want. If I remove the custom route, it calls my function, but what I want to be displayed in the address bar is: localhost:xxxx/Wizard/1 where the number at the end is the page (div shown) of the wizard either 1, 2, 3, or 4. So is there something I'm missing or can it not be done? Thanks.

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  • Sybase ODBC connection String with .net

    - by nitinkhanna
    Hi, I am having SYBASE 12.5 install on my server as well as my PC, I am unable to get the correct connection string. I have used the connectionstrings.com but unable to get the correct one. After runnig and making the connection Driver={Sybase ASE ODBC Driver};srvr=server_name;database=database_name;UID=user_name;PWD=pass; and some other combination of thic connection string I am getting the Datasource ="" Driver ="" DataBase="" ServerVersion = Invalid Operation. Connection is closed What am I suppose to correct in that. Please help. Thanks

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