Web Forms :: Adding A CustomValidator From The Code Behind File?
Mar 19, 2010
I have a CheckBoxList generated from the code behind file that I want to validate with a CustomValidator.However, I don't succeed in stating the C# function that it has to use, and I can't seem to bind it to the CheckBoxList control.
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and then something like:WorkCheckboxValidator.ControlToValidate = WorkScheduleCheckboxList.ToString();
I have an asp.net application. I want to add a global.asax and global.asax.cs file to my project. In the IDE when I select to create a new global.asax file, the option to create a CS code behind file is greyed out. When the global.asax file is created, no code behind is created, instead code is placed in the global.asax file and the global.asax.cs file is never created? Why is the option for a C# code behind file greyed out?
i have this ValidationExpression="(d{1,}.{0,2} .{2,})|(.{2,} d{1,}.{0,2})" used in regularexpression validator. I want to use the same one in a customvalidator. But customvalidator does not have option validationexpression. how can i add this in code or in tag.
I want to add some vb code within the html, or the source part of the page witjin visual studio here is my attempt but it doesnt seem to work, none of the requested parts appear.
I'm trying to essentially add a dropdownlist control array to a from from the code-behind but I am getting an HttpException error saying that it must be placed inside a form tag with runat=server. How can I do this? This is the code I have right now for it:
DropDownList[] cmbArray = new DropDownList[8]; cmbArray[0] = new DropDownList(); Page.Controls.Add(synthesisSteps[0]);
This is in the Page_Load event. Also I am using .NET 3.5.
I'm working in 2008 and cannot find out how to simply add the preload event to the code behind. In 2005 I just simply double clicked on the event in the list and it would set it up for me.
I was wondering if there was anyway to populate the page with asp.net code like "<asp:Repeater ID="rptProducts" runat="server">MORE_CODE</asp:Repeater>" and then have the server use that code on the page. I'm not sure if i'm making sense. Like writing the asp.net front end code to the page dynamically before the .net engine generates the output html.
I am having issues correctly setting up reference to javascript code to a custom validator.This is my javascript code in the .aspx page.
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And here is where I add the Client Validation to the customer validator in the code behind. [Code]....
The validation is if there is a value present in the first text box then the second text box is required.The page throws an error when the validation should fail, but if I ignore the error the validation works correctly.Do I need to move my javascript to the code behind as well?
I'm trying to add some basic HTML markup to my code-behind, just a H1 and a few breaks separating strings in the message.Body, but can't seem to get it going without errors.
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Probably a straightforward thing, or not intended usage at all,
I am generating xhtml in code that is then inserted into the page. Are there class(es) that help with adding tags etc. Then having a function that will output it to a string. (like the xml dom api) code like:
I inherited an application written for VB.Net and am converting it over to ASP.Net, with VB as the back end. I have a data pull that adds values to a new instance of a class, then adds the item to a listbox. It worked great in the VB.Net version, but I get the following error in the Visual Studio Text Editor when I try to use the code:
Overload resolution failed because no accessible 'Add' can be called with these arguments:
'Public Sub Add(Item As System.Web.UI.WebControls.ListItem)':Value of type 'MyItem' cannot be converted to System.Web.UI.WebControls.ListItem'. 'Public Sub Add(Item as String)':Value of type 'MyItem' cannot be converted to String.
I have played around with the code quite a bit and have been researching online, but I'm just drawing a blank here.
I put the class("MyItem") in the "App_Code" folder in a file called "MyItem.vb". The class code is as follows:
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The code I have for the sub that is supposed to add the items to the listbox is as follows:
iam trying to add an iFrame to an code behind file dynamically, using cell.Controls.Add(new LiteralControl("<iframe id=AttachmentFrame scrolling='yes' frameborder='1' title='ShowAtt' width='100%' height='50%' src='pdf/1.pdf'></iframe>"));
row.Controls.Add(cell); viewTable.Rows.Add(row);
when launching the page its loading the pdf then not displaying in the webpage even when i try to open another aspx page in the iframe nothing is appearing although seems launching the webpage cuz it asks me username and password then nothing displays.while adding the iframe in the aspx file its both links are working correctly
note: i have a friend told me that in code behind like the one above have he has it working correctly but in my case i dont know whats wrong!
I'm trying to add an DropDownList to a DetailsView by code, because i'm writing a solution that let's the user select an table and view your records and edit them, some of theese tables, have a foreign key column and the user must have to select some item in the list.
Below is my sample code:
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the code above is working correctly, when the user click in the buttons New or Edit , the DetailsView opens correctly, showing the DropDownlist, but when the user click in the buttons update or insert , an error occurs, the viewState cannot be loaded:
Failed to load viewstate. The control tree which viewstate is being loaded must match the control tree used to save viewstate during the previous request. For example, when controls are added dynamically, the controls added during a post must match the type and position of the controls added during the initial request.
I have a formview that I open to the edit template, some textboxes are not available and some are populated by dropdown lists, and the update function works fine.
As soon as I add some logic to the code behind page for the update control, the UPDATE link on the formview stops updating my DB.
I am working solo on an Asp.net/C# project created by someone in the past. I created two new web forms, and then built the prjocect and did the deploy using a TFS team build project. For some strange reason, my Aspx file is not getting copied to the destination DEV server. It does get copied to a temp folder on that server, but in the end, the team build is failing and not copying over the new Aspx file.
So until I figure out how to fix the team build script, is their a way to just copy the Aspx file out to the desired server location? That as well as copying out a dll which is associated with the build file?
I have two CustomValidators, both of which function in the same way (call a query and check if a particular value is available in the DB), the only difference is the query itself.
Rather than writing the same function definition in the code-behind, I would like to find a way to execute a particular query depending on which CustomValidator called the function (I guess using the CustomValidator's ID) so if I have the follwing:
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How can I check in the code behind , which validator called the function "Check"??
I'm doing a multiple file upload script that add flies to a listbox and afterward uplods them to folder.
Every thing goes fine, even under the size and a extension restrictions, but when I try to add an .exe file with 30MB I would expect the script to write a warning saying the file is over the size limit and as an extension that cannot be uploaded, instead it shows a Page Unavailable
I'd tried to troubleshoot with try/catch on the init event but it doesn´t reach that far, it seem's that the compilation stops with no explanation...or is there?
is it possible to add more then one file name in app settings.??if so,how to work around with second file.?..i currently have one file listed in app setting,
<appSettings file="list.config" >//i need to add another file here with values?????? <add key="key1" value="a"></add> <add key="key2" value="b"></add> <add key="key3" value="c"></add> </appSettings>