Forms Data Controls :: Trying To Use Database Variable For LinkButton Id?
Feb 28, 2011
I want to grab a numeric value from the database and thereby use it in a datagrid. This will be connected to a linkbutton which has a hyperlink which will bring up profile information based on the number returned. I'm getting a value back but when I click the link, the querystring sees <% instead of the id number I want to use. So I'm really not sure what I'm missing so here's my code:
i m having 4 radio buttons on default2.aspx page on the same page i m using a database it's columns are uname and status whenever the user clicks on the radiobutton the status of that name should increment by 1(counter variable).
using System; using System.Collections.Generic; using System.Linq; using System.Web;
On the code behind, I am setting a variable called test and on Page_Load, changing the variable to something else. How come, when I click the dynamically added LinkButton, the test variable is not maintaining it's state:
Nested GridView Control returns "Object variable or With block variable not set" when outer GridView returns rows.
The Nested GridView Control works as long as the outer GridView returns rows, the following code works: [Code]....
Object variable or With block variable not set.
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 variable or With block variable not set.
Source Error:
Line 118: If e.Row.RowType = DataControlRowType.DataRow Then Line 119: Dim myStatus_ID As SqlDataSource = CType(e.Row.FindControl("sqlDeviceStatusAssign"), SqlDataSource) Line 120: If Not e.Row.DataItem("Status_ID") Is Nothing Then Line 121: myStatus_ID.SelectParameters(0).DefaultValue = e.Row.DataItem("Status_ID") Line 122: End If
I have tried checking for IsDbNull and checking to see if a label exists in a given row. This code *If Not e.Row.DataItem("Status_ID") Is Nothing Then* appears to do nothing.Same with the following:
*Dim localLblItemReference As Label = CType(e.Row.FindControl("lblItemReference"), Label)
To further clarify my question above, I am looking for a method to detect e.Row.DataItem("Status_ID") is nothing/null due to the outer GridView returning 0 results in a query.I have a (Outer) GridView Control with another GridView Control inside of a template field with it's associated SqlDataSource control.
In the "Protected Sub GridViewReport_RowCreated", I provide the Select Parameter for the associated SqlDataSource with the DataItem row value.When the (Outer) GridView Control does not return any rows, the "e.Row.DataItem("Status_ID")" throws a:
Exception Details: System.NullReferenceException: Object variable or With block variable not set.
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I am very confused about this problem, and i have tried a lot of things to fix it, but for some reason it rejects finding my LinkButton..aspx page:
[Code]....
I have tried the following things and still getting the message the the object reference not set to an instance:
[Code]....
[Code]....
[Code]....
And still it tells me that the object reference is not set to an instance. I find this very strange and hopefully there's someone who can tell me where i make a mistake?
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