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  • I'm a professional Java developer, should I learn .NET?

    - by Alex Spurling
    Java and .NET seem to have a great number of parallels especially in the web application area. Both languages have many of the same technologies especially in terms of open source libraries (JUnit and NUnit, Hibernate and NHibernate) but there are also plenty of differences and different approaches to solving certain software development problems. As a Java developer I get the feeling I'm missing out on learning about web application development from the .NET point of view and I could learn a lot about the general principles by learning two languages rather than getting stuck in the details of Java and not seeing the bigger picture. So the first question is, do you agree? Does learning two separate but similar languages such as Java and .NET make you a better programmer? Secondly, I'm worried that if I choose to take, for example, a MCPD ASP.NET 3.5 certification it won't actually help me get work doing .NET development because it goes against all my existing experience. Is trying to broaden your skills a good career choice or is it a better decision to choose one technology and stick with that?

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  • resize image in asp.net

    - by alina
    I have this code to resize an image but the image doesn't look so good: public Bitmap ProportionallyResizeBitmap(Bitmap src, int maxWidth, int maxHeight) { // original dimensions int w = src.Width; int h = src.Height; // Longest and shortest dimension int longestDimension = (w > h) ? w : h; int shortestDimension = (w < h) ? w : h; // propotionality float factor = ((float)longestDimension) / shortestDimension; // default width is greater than height double newWidth = maxWidth; double newHeight = maxWidth / factor; // if height greater than width recalculate if (w < h) { newWidth = maxHeight / factor; newHeight = maxHeight; } // Create new Bitmap at new dimensions Bitmap result = new Bitmap((int)newWidth, (int)newHeight); using (Graphics g = Graphics.FromImage((System.Drawing.Image)result)) g.DrawImage(src, 0, 0, (int)newWidth, (int)newHeight); return result; }

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  • ASP.NET GridView EditTemplate and find control

    - by Geetha
    In the GridView we are using an edit button. Once the edit button is clicked Controls in the edit template will display in the same row with update button. That row has two dropdownlist controls. Process flow: controls:d1 and d2 d1 is using sqldatasource for item display : working fine. d2 is using codebehind code to load the item based on the selected value in the d1 : Not working How to find the control in the edit template to display item value for d2?

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  • need thoughts on my interview question - .net, c#

    - by uno
    One of the questions I was asked was that I have a database table with following columns pid - unique identifier orderid - varchar(20) documentid - int documentpath - varchar(250) currentLocation - varchar(250) newlocation - varchar(250) status - varchar(15) I have to write a c# app to move the files from currentlocation to newlocation and update status column as either 'SUCCESS' or 'FAILURE'. This was my answer Create a List of all the records using linq Create a command object which would be perform moving files using foreach, invoke a delegate to move the files - use endinvoke to capture any exception and update the db accordingly I was told that command pattern and delegate did not fit the bill here - i was aksed to think and implement a more favorable GoF pattern. Not sure what they were looking for - In this day and age, do candidates keep a lot of info on head as one always has google to find any answer and come up with solution.

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  • how to open a .pdf file in a panel or iframe using asp.net c#

    - by rahul
    I am trying to open a .pdf file on a button click. I want to open a .pdf file into a panel or some iframe. With the following code i can only open .pdf file in a separate window or in a save as mode. string filepath = Server.MapPath("News.pdf"); FileInfo file = new FileInfo(filepath); if (file.Exists) { Response.ClearContent(); Response.AddHeader("Content-Disposition", "inline; filename=" + file.Name); Response.AddHeader("Content-Length", file.Length.ToString()); Response.ContentType = ReturnExtension(file.Extension.ToLower()); Response.TransmitFile(file.FullName); Response.End(); } how to assign a iframe to the below line Response.AddHeader("Content-Disposition", "inline; filename=" + file.Name);

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  • Adding custom valiadtion to ASP.NET controls

    - by Brian
    We're trying to build a simple asp control for some clients where they can just drop in a single block - i.e. <captcha:CaptchaControl ID="CaptchaControl1" runat="server" Server="http://localhost:51947/" /> and have it render the control. The catch is that I can't get this to include custom validation. Right now I'm using the RenderContents function to display the layout of the control itself as well as hook it up the to Javascript. The problem is that I don't know how to get custom validation to fire when used as part of a control. protected override void RenderContents(HtmlTextWriter output) { output.Write(@" <script type=""text/javascript"" src=""http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js""></script> <link rel=""stylesheet"" type=""text/css"" href=""/Layout/CaptchaLayout.css"" /> //etc <asp:Textbox id=""text1"" runat=""server"" text=""""></asp:Textbox> <asp:CustomValidator id=""CustomValidator2"" runat=""server"" ControlToValidate = ""text1"" ErrorMessage = ""You must enter at least 8 characters!"" ClientValidationFunction=""validateLength"" > </asp:CustomValidator>" ); } Any suggestions for a better way to do this?

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  • VB.Net Validate an xml against a schema (strange problem)

    - by Apeksha
    I have written a small XML validator, that takes in an XML file and an XML schema and validates the XML files against that schema. It works well, except for an XML file, with this content: <?xml version="1.0" encoding="utf-8"?> <xc:program xmlns:xc="http:\\www.something.com\Schema\XC10" xc:version="4.0.22.0" > <xc:namespaceDecls> <xc:namespaceDecl xc:namespaceDeclURI="urn:swift:xsd:abc"> <xc:namespaceDeclPrefix>n</xc:namespaceDeclPrefix> </xc:namespaceDecl> </xc:namespaceDecls> </xc:program> I tried to validate this XML file against a bunch of different schemas. No matter which schema I select, this XML file comes out as valid. What is it that I am missing? Here is the relevant piece of code: 'Create a schema cache and add the given schema to it. Dim schemaCache As New Schema.XmlSchemaSet schemaCache.Add(targetNamespace, schemaFilename) 'Create an XML DOMDocument object. Dim xmlDom As New XmlDocument 'Assign the schema cache to the DOM document. 'schemas collection. xmlDom.Schemas = schemaCache 'Load selected file as the DOM document. xmlDom.Load(xmlFilename) xmlDom.Validate(AddressOf ValidationCallBack)

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  • vb.net .aspxauth

    - by Morgan
    I am working with a large site trying to implement web parts for particular users in a particular subdirectory but I can't get the .ASPXAUTH cookie to be recognized. I've read dozens of tutorials and MS class library pages that tell me how it should work to no avail. I am brand new to Web parts, so I'm sorry if I'm unclear. The idea is that logged in users can travel the site, but then when they go to their dashboard, they are programmatically authenticated using Membership and FormsAuthentication to pull up their Personalization. When I step through the code, I can see the cookie being set, and that it exists on the following page, but Membership.GetUser() and User.Identity are both empty. I know the user exists because I created it programmatically using Membership.CreateUser() and I can see it when I do Membership.GetAllUsers() and it's online when i use Membership.GetUser(username) but the Personalization doesn't work. Right now, I'm just trying to get the proof of concept going. I've tried creating the ticket and cookie myself, and also using SetAuthCookie() (code follows). I really just need a clue as to what to look for. Here's the "login" page... If Membership.ValidateUser(testusername, testpassword) Then -- Works FormsAuthentication.SetAuthCookie(testusername, true) Response.Redirect("webpartsdemo1.aspx", False) End If And the next page (webpartsdemo1.aspx) Dim cookey As String = ".ASPXAUTH" lblContent.Text &= "<br><br>" & Request.Cookies(cookey).Name & " Details" lblContent.Text &= "<br>path = " & Request.Cookies(cookey).Path lblContent.Text &= "<br>domain = " & Request.Cookies(cookey).Domain lblContent.Text &= "<br>expires = " & Request.Cookies(cookey).Expires lblContent.Text &= "<br>Secure only? " & Request.Cookies(cookey).Secure lblContent.Text &= "<br>HTTP only? = " & Request.Cookies(cookey).HttpOnly lblContent.Text &= "<br>Has subkeys? " & Request.Cookies(cookey).HasKeys lblContent.Text &= "<br/><br/>request authenticated? " & Request.IsAuthenticated.ToString lblContent.Text &= " Getting user<br/>Current User: " Dim muGidget As MembershipUser If Request.IsAuthenticated Then muGidget = Membership.GetUser lblContent.Text &= Membership.GetUser().UserName Else lblContent.Text &= "none found" End If Output: .ASPXAUTH Details path = / domain = expires = 12:00:00 AM Secure only? False HTTP only? = False Has subkeys? False request authenticated? False Getting user Current User: none found Sorry to go on so long. Thanks for any help you can provide.

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  • Editing a labels text value through JavaScript in VB ASP.NET

    - by Ronnie
    I have a simple form containing two text boxes, I am attempting to apply some validation to the first text box using JavaScript. This is the first time I have attempted this and am having some trouble. I have a label beside the text box stating an error, this labels visibility property is set to False. I wish the labels visibility to turn true if the text box is empty when the user loses focus. For this I have used the onBlur option within the tags of the text box. It then calls the JavaScript function and should set the label to Visible but it does not. I have tested to see if it is entering the function by using an alert instead and that works. The problem seems to be trying to alter the visibility property of the label. Here is the portion of my code: The JavaScript: function myRegEx(frm) { if ( boxUsername.value == "" ) { invalidUser.visible = True; return false; } } The form: <asp:TextBox onblur="return myRegEx(this)" id="boxUsername" runat="server" Width="200px"></asp:TextBox> <asp:Label id="invalidUser" runat="server" visible="False" forecolor="Red" text="* Username must be alphanumeric with no special characters"></asp:Label> Any help would be brilliant.

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  • Autocomplet extender control in ajax (asp.net)?

    - by Surya sasidhar
    hi, i am using autocomplete extender in my application but it is not working. this is my code.. <form id="form1" runat="server"> <asp:scriptmanager ID="Scriptmanager1" runat="server"></asp:scriptmanager> <br /> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <div> <cc1:AutoCompleteExtender TargetControlID="TextBox1" MinimumPrefixLength="1" ServiceMethod="GetVideoTitles" CompletionSetCount="10" ServicePath="Myservices.asmx" ID="AutoCompleteExtender1" runat="server"> </cc1:AutoCompleteExtender> </div> </form> this is webservice method public string[] GetVideoTitles(string prefixText) { SqlConnection con = new SqlConnection(@"Data Source=SERVER5\SQLserver2005;Initial Catalog=tpvnew;User ID=xx;Password=525"); con.Open(); SqlCommand cmd = new SqlCommand("video_videotitles", con); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add("@prefixText", SqlDbType.VarChar, 50); cmd.Parameters["@prefixText"].Value = prefixText; SqlDataAdapter da = new SqlDataAdapter(cmd); DataTable dt = new DataTable(); da.Fill(dt); string[] items = new string[dt.Rows.Count]; int i = 0; foreach (DataRow dr in dt.Rows) { items.SetValue(dr["videotitle"].ToString(), i); i++; } return items; }

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  • ASP.NET MVC SSL POST Error

    - by RyanFetz
    I have a Logon page in a MVC (1.0) application that I am securing with SSL, I have an attribute that inspects the request for the page and redirects to a https uri when it is requested with http. This all works, however when I post the form content i get the following error: The parameters dictionary contains a null entry for parameter 'rememberMe' of non-nullable type 'System.Boolean' for method 'System.Web.Mvc.ActionResult LogOn(System.String, System.String, Boolean, System.String)' in 'DAC.US.Web.Portal.Controllers.AccountController'. To make a parameter optional its type should be either a reference type or a Nullable type. Parameter name: parameters here is the controller code... // // GET: /Account/LogOn [RequiresSSL] public ActionResult LogOn(string ReturnUrl) { if (TempData["Message"] != null) ViewData["Message"] = TempData["Message"]; TempData["Message"] = null; ViewData["ReturnUrl"] = ReturnUrl ?? "/Home"; return View(); } Again, the RequireSSL Attribute works, but the POST from that SSL uri does not. What is not working?

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  • Asp.net MVC, after using jeditable (Edit in place)

    - by coure06
    Ok, i can use jeditable to edit-in-place some content on a page and the content will be saved to a database. But whats the best way to re get that text-content from db to show into a place holder? p id="paraNo34" class="editable" --What i will write here so that it will get content from a db's table: [Content], where id=="paraNo34". /p The problem is if i will use some hard coded text like p id="paraNo34" class="editable" --Some text here /p I will able to edit-in-place using jeditable but when i will refresh page it will show the same "Some text here" as its not getting data from db.

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  • Save as DialogBox to save textbox content to a newfile using asp.net

    - by user195114
    I want the users to type their text in the given textbox and on clicking on createNewFile Button, a SaveAs Dialogbox should popup and the users should browse through the location and save the file as desired. I have tried some thing but (1) the dialog box goes behind the application (2) when run, dialogbox opens 3 times, means it executes 3 times REPLY TO THE POST protected void btnNewFile_Click(object sender, EventArgs e) { StreamWriter sw = null; try { SaveFileDialog sdlg = new SaveFileDialog(); DialogResult result = sdlg.ShowDialog(); sdlg.InitialDirectory = @"C:\"; sdlg.AddExtension = true; sdlg.CheckPathExists = true; sdlg.CreatePrompt = false; sdlg.OverwritePrompt = true; sdlg.ValidateNames = true; sdlg.ShowHelp = true; sdlg.DefaultExt = "txt"; // sdlg.ShowDialog = Form.ActiveForm; string file = sdlg.FileName.ToString(); string data = txtNewFile.Text; if (sdlg.ShowDialog() == DialogResult.OK) { sw.WriteLine(txtNewFile.Text); sw.Close(); } if (sdlg.ShowDialog() == DialogResult.Cancel) { sw.Dispose(); } //Save(file, data); } catch { } finally { if (sw != null) { sw.Close(); } } } private void Save(string file, string data) { StreamWriter writer = new StreamWriter(file); SaveFileDialog sdlg1 = new SaveFileDialog(); try { if (sdlg1.ShowDialog() == DialogResult.OK) { writer.Write(data); writer.Close(); } else writer.Dispose(); } catch (Exception xp) { MessageBox.Show(xp.Message); } finally { if (writer != null) { writer.Close(); } } } I have tried this.

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  • Create/Edit/Save data in a jQuery pop-up for ASP.NET-MVC and Linq2Sql

    - by RememberME
    I have a MVC page which allows creation and editing of a subcontract. When the user has to select a company for the subcontract, I would like for them to have the option to create a new company. I've made a jQuery pop-up with the company fields, but I don't know how to then save this information to the company table. I would also like to be able to use the same pop-up to allow the user to edit the information for an existing company, but need direction in how to send the information to the pop-up.

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  • "The given key was not present in the dictionary" ASP.NET error on IIS7

    - by eugeneK
    Hi, i have this error on one of my sites. Searched thought all project found no Dictionary of some kind. Read somewhere it could be caused by Url Rewrite module on IIS 7 which i'm using for certain redirects. Error appears on all pages thought the site, 99% sure only on pages that use Url Rewriting This is error's stack at System.ThrowHelper.ThrowKeyNotFoundException() at System.Collections.Generic.Dictionary`2.get_Item(TKey key) at System.Data.DataView.System.Collections.IList.get_Item(Int32 recordIndex) at System.Web.UI.WebControls.ListViewPagedDataSource.EnumeratorOnIList.get_Current() at System.Web.UI.WebControls.ListView.CreateItemsWithoutGroups(ListViewPagedDataSource dataSource, Boolean dataBinding, InsertItemPosition insertPosition, ArrayList keyArray) at System.Web.UI.WebControls.ListView.CreateChildControls(IEnumerable dataSource, Boolean dataBinding) at System.Web.UI.WebControls.ListView.PerformDataBinding(IEnumerable data) at System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data) at System.Web.UI.WebControls.DataBoundControl.PerformSelect() at System.Web.UI.WebControls.ListView.PerformSelect() at System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() at System.Web.UI.WebControls.ListView.CreateChildControls() at System.Web.UI.Control.EnsureChildControls() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)HTTP_CONNECTION:Keep-Alive HTTP_ACCEPT:image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-icq, / HTTP_ACCEPT_LANGUAGE:en HTTP_COOKIE:__utma=248870149.1673016949.1252234176.1276449788.1276595165.49; __utmz=248870149.1276595165.49.55.utmcsr=search|utmccn=(organic)|utmcmd=organic|utmctr=???%20??; wooTracker=C1T8MWMAZWQVHJXWROHB25SO4S0B7UO0; __utmb=248870149.6.10.1276595165; __utmc=248870149; wooTracker=C1T8MWMAZWQVHJXWROHB25SO4S0B7UO0; machine-id=87.69.44.154%3A1253914747956; wooMeta=ODAwMzkmMSYxJjc1MDE5JjEyNTUyMTQwODEwMjkmMTI1NTIxNDE1NjA0OCYmMTAwJiYzMDAyODQmJiYm; _csoot=1267959625296; _csuid=X4c1ef311c39a67; ASP.NET_SessionId=zzdn5b45uqyhw145ptqhxe20 HTTP_HOST:**** HTTP_REFERER:***** HTTP_USER_AGENT:Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; GTB6) HTTP_X_CEPT_ENCODING:gzip, deflate ***** Is anyone familiar with fix or at least where to look for one ?

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  • Building URL or link in REST ASP.NET MVC

    - by AWC
    I want to build a URL at runtime when a resource is render to either XML or JSON. I can do this easily when the view is HTML and is rendering only parts of the resource, but when I render a resource that contains a links to another resource I want to dynamically generate the correct URL according the host (site) and resource specific URI part. <components> <component id = "1234" name = "component A" version = "1.0"> <link rel = "/component" uri="http://localhost:8080/component/1234" /> </component> <components> How do I make sure the 'uri' value is correct?

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  • Anything new for WinForms in .NET 4.0

    - by Robert
    I could not find any information about new WinForm features, exept for this blog post: http://blog.codinglight.com/2009/05/future-of-winforms-whats-changed-in.html which states: 213 types were changed, and 9 types were added. 596 methods were changed, 50 were added, and 8 were removed. So whats in these changes, for joe developer?

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  • Mono ASP.NET Oracle Connection

    - by bladepit
    Hello to everybody, if i want to connect to orcale i became the following error: libclntsh.so Description: HTTP 500. Error processing request. Stack Trace: System.DllNotFoundException: libclntsh.so at (wrapper managed-to-native) System.Data.OracleClient.Oci.OciCalls/OciNativeCalls.OCIEnvCreate (intptr&,System.Data.OracleClient.Oci.OciEnvironmentMode,intptr,intptr,intptr,intptr,int,intptr) <0x0005d at System.Data.OracleClient.Oci.OciCalls.OCIEnvCreate (intptr&,System.Data.OracleClient.Oci.OciEnvironmentMode,intptr,intptr,intptr,intptr,int,intptr) [0x00000] in /src/monoscript/mono-2.4.2.3/mcs/class/System.Data.OracleClient/System.Data.OracleClient.Oci/OciCalls.cs:738 at System.Data.OracleClient.Oci.OciEnvironmentHandle..ctor (System.Data.OracleClient.Oci.OciEnvironmentMode) [0x00013] in /src/monoscript/mono-2.4.2.3/mcs/class/System.Data.OracleClient/System.Data.OracleClient.Oci/OciEnvironmentHandle.cs:35 at System.Data.OracleClient.Oci.OciGlue.CreateConnection (System.Data.OracleClient.OracleConnectionInfo) [0x00000] in /src/monoscript/mono-2.4.2.3/mcs/class/System.Data.OracleClient/System.Data.OracleClient/OciGlue.cs:86 at System.Data.OracleClient.OracleConnectionPoolManager.CreateConnection (System.Data.OracleClient.OracleConnectionInfo) [0x00006] in /src/monoscript/mono-2.4.2.3/mcs/class/System.Data.OracleClient/System.Data.OracleClient/OracleConnectionPoolManager.cs:57 at System.Data.OracleClient.OracleConnectionPool.CreateConnection () [0x0000e] in /src/monoscript/mono-2.4.2.3/mcs/class/System.Data.OracleClient/System.Data.OracleClient/OracleConnectionPool.cs:97 at System.Data.OracleClient.OracleConnectionPool.GetConnection () [0x000ba] in /src/monoscript/mono-2.4.2.3/mcs/class/System.Data.OracleClient/System.Data.OracleClient/OracleConnectionPool.cs:74 at System.Data.OracleClient.OracleConnection.Open () [0x00061] in /src/monoscript/mono-2.4.2.3/mcs/class/System.Data.OracleClient/System.Data.OracleClient/OracleConnection.cs:410 at WebServer.Controllers.HomeController.Index () [0x00006] in /home/bhcweb/Projects/Controllers/HomeController.cs:19 at (wrapper dynamic-method) System.Runtime.CompilerServices.ExecutionScope.lambda_method (System.Runtime.CompilerServices.ExecutionScope,System.Web.Mvc.ControllerBase,object[]) <0x00080 at System.Web.Mvc.ActionMethodDispatcher.Execute (System.Web.Mvc.ControllerBase,object[]) <0x0001b at System.Web.Mvc.ReflectedActionDescriptor.Execute (System.Web.Mvc.ControllerContext,System.Collections.Generic.IDictionary2<string, object>) <0x000fd> at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod (System.Web.Mvc.ControllerContext,System.Web.Mvc.ActionDescriptor,System.Collections.Generic.IDictionary2) <0x0001c at System.Web.Mvc.ControllerActionInvoker/c_AnonStoreyB.<m_E () <0x00067 at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter (System.Web.Mvc.IActionFilter,System.Web.Mvc.ActionExecutingContext,System.Func`1) <0x000c4 What is my Problem there? I have read that i have to set my ORACLE_HOME AND LD_LIBRARY_PATH. If i do echo $ORACLE_HOME and $LD_LIBRARY_PATH the path which i have set is coming out: /usr/lib/oracle/xe/app/oracle/product/10.2.0/client/lib This is the path where the libclntsh.so is in. Is this right? Best regards bladepit

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