I have a Data list, inside that i have a repeater, inside the repeater i have a panel.hat i want to do is reference my panel (Panel1) so that i can change the visible properties when a link button is clicked. However as this is inside a dynamic control i am a bit lost in how to reference it! This is my code
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referencing a control inside the createuserWizard template of the createuserStep
I tried like this:
Dim lastn As TextBox = CType(CreateUserWizard1.FindControl("LastNameTxt"), TextBox)
and like that:
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I have a user control inside a repeater. I am binding a collection of objects to the repeater.
My user control has a public property to retrieve the object (setobject)
How do i pass each object through to the user control and not just the object property value? What is the syntax to do this?
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why I get this error:
Object reference not set to an instance of an object.
when I try to access a LinkButton inside a Repeater as follows:
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I would like to know how to reference the asp.net text field which is in the EditItemTemplate tag of a DetailsView control to load the JQuery DatePicker when clicked in the JQuery script. Following are the code that I have, but it throws the error :
The name 'txtDateOfBirth' does not exist in the current context
JQuery at the header of the page:
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I am using a CustomValidator to compare two textbox control values in the form view. These values are not required but must be compared if a valuue is entered. The same two controls are defined in both Edit Item Template and Insert Item Template. The formview default mode is Edit.
The javascipt for the custom validator works when in Edit mode. However, when the form view is Insert, the javascript throws an error of NullReferenceException. how I can adjust my code so that the client-side javascript works for both Edit and Insert mode?
The form view is in a content page. The script is in the Head content placeholder
<script type="text/javascript">
<!--
function cvSecondaryEmail_Validate(source, args)
{
[Code].....
I have an imagebutton control in the column HeaderTemplate of a gridview and want to know how to reference the imagebutton so I can add an attribute to it programmatically. Following is the code for my gridview control:
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I can reference the checkbox control correctly with CheckBox chkbox = GridView1.FindControl("chkSelected") as CheckBox;However, I have tried the following code for the imagebutton but I get the error message Object reference not set to an instance of an object.:
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Or is the OnInit event handler the right place to reference the control?
I'm trying to understand how to build a self referencing model for hierachical data. Eventually i will be creating a category tree.
I don't anything in tables yet. After I have the structure nailed down then I will create the tables. My existing Object is defined like this:
public class Categories
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Usage :
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The problem is it gives me following error :
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
Line 21: {
Line 22: base.OnInit(e);
Line 23: _ContentTemplate.InstantiateIn(BodyControlSpace);
Line 24: }
Line 25:
can you please help me to brainstorm the possible causes of this error. I've got a paged repeater with localisation bound programitcally to an sqldatasource using a stored proc. I can post code if needs be but it's rather long. I'm looking for typical causes of this error + will make note for future reference!
erver Error in '/WebSite4' Application.
Object reference not set to an instance of an object.
Description:
An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
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Line 233:Line 234: Repeater1.DataSource = PagedResultsLine 235: Repeater1.DataBind()Line 236: doPaging()Line 237: End Sub
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I am getting error of in Foreach loop
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How to resolve this situation or any other alternative to cum out of this problem.
I have a ObjectDataSource and a ListView referencing it.
I have created a Templated User Control (see:
http://msdn.microsoft.com/en-us/library/36574bf6.aspx) and placed it in the ListView's InsertItemTemplate
It has one template <ContentTemplate>. Inside that template, I've defined a couple of server controls with their properties = '<%# Bind("colName") #>'.
See below:
[Code]......
I want to use a dropdownlist control as paging options (50, 100, 150, 200) for a GridView control so I can reuse the user control on other pages that uses paging.The dropdownlist control will be in the user control page and the GridView will be on the host page. How do I reference the GridView control generically from the dropdownlist in the user control to set the PageSize property of the GridView control upon selecting one of the dropdownlist options. Any advice and if there are other means to accomplish such tasks to allow reusability.
View 1 Replies I would like to use the gridview paging feature and have built a gridview with a user control. The data source has lots of columns, so to make it easier I want to return a LIST<MyObject> and just pass <Myobject> into the user control rather than all the data elements. Not sure how I access the object of the data source to bind to the control. Assume it would be during ondatarowbound.
Also, my guess is there is a better way to do this than gridview. I'd take either solution that allows me to have easy paging and pass the complete object into the user control
I have advice that this might work for programmatically filling a set of literals from a set of object properties:-
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However, the line: ctl.Text = pageData.help(i).trim() fails because it's not understood that pageData.help(i) should translate to pageData.help1, pageData.help2, etc.
I'm trying to create a self referencing object using linqTOsql mapping. So far, I am definitely in over my head. Here's the code I have:
[Table]
public class Category
{
[Column(IsPrimaryKey=true, IsDbGenerated=true, AutoSync=AutoSync.OnInsert)]
public Int64 catID { get; set; }
public Int64 parentCatID { get; set; }
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How can i set the value of literal control inside itemtemplate control of gridview from code behind ?(i am using vb.net)
View 1 RepliesI need to access a control inside a repeater and change its properties. To enable it or not. I got an erorr message Object reference not set to an instance of an object. Here is my code inside a method. protected void
rptCAP_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
LinkButton lnDel = (LinkButton)rptCap.FindControl("lnkDelete");
lnkDel.Enabled = false; //<<<<< this is where the error occur
}
The name of the repeater control is id="rptCAP"
How to create Grid view control inside Repeater control.
View 7 RepliesI want to reference a variable inside an html element without having to use an asp lable. for example at the start of the page I grab the current year and then inside a paragraph html tag I want to output this. I have tried using <%# year%> and <%=year%> but I get an error. Here is the code
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I have a gridview with a SQL Where clause based on the selected item of a dropdown list which is inside a DetailsView.
I know how to find the controlID of the dropdown list from codebehind using FindControl, but how do I do it declaratively for my Where clause? Or do I do I set up the Where clause somehow using codebehind?
I have a button on a page with a Repeater and an ObjectDataSource. To give credit where credit is due, the Repeater's paging functionality is courtesy of ScottGu. (However, I'm using ASP.NET 4.0 and SQL Server 2008, as opposed to ASP.NET 2.0 and SQL Server 2005.)
Anyway, in the button's click event, I need to access the Text property of a Label that's inside the Repeater because it's used as an input parameter in a stored procedure. I'm getting a NullReferenceException when trying to access the Label's Text property. I have researched this error and have tried a few different solutions (involving FindControl and the Repeater's ItemDataBound event), but I haven't been able to get it to work. The code is below.
somepage.aspx
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I have a DataList with controls in the Header that are used to filter the DataList. Everything works correctly until I try and edit the filtered DataList. Having set the EditItemIndex, I then need to read the values from the header filter controls to ensure the Bind returns the same collection of rows. I am calling a function that should return the Header DataListItem so I can get the filter values if set. The problem is the DataList Item collection does not seem to have the HeaderItems in it.
Ian HTML
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I have a dropdownlistbox which references a specific column for a table in my database. After I select the proper id from the dropdownlistbox, I should press the submit button to see the name of the customer populated in a text field who references the id number for the dropdownlistbox. However, I am having trouble referencing a different column within the table. I can only view the selected value from the dropdownlistbox in the text box.
protected void EmployeeIDNumberListBox_SelectedIndexChanged(object sender, EventArgs e)
I' working on an Office Supplies website for a college course I'm doing. I have most of the website created, I'm just working on the shopping cart element of it now.
When the user goes to check out, I have a Gridview displaying the items the user wishes to buy as follows, it contains 3 columns, REF NBR, Product Name and Quantity, when the user clicks on the 'BUY NOW' button I want to take all the reference numbers from the Gridview and search teh database and deduct the Quantity from the number of items in stock.
I know I'll have to have a loop to read through the gridview, but how do I reference the contains of the Gridview REF NBR cell ?