I need to dynamically create a control with variable and pass variable to sub

Question

I thought this might be easy, but I don't seem to be getting it. I'm working in VB. I'm dynamically creating rows within a table but I wish to add an "EDIT" link/button/event-trigger-of-some-kind that fires a sub, but I need to pass a variable to the sub. The code is as follows. Note the variable that I need to pass is an integer.

Dim CellDescriptionEdit As New TableCell()
RowNameDescription.Cells.Add(CellDescriptionEdit)
CellDescriptionEdit.ID = "CellDescriptionEdit" & UserReader("fldClaimPmtID")
Dim LinkButtonEdit As New LinkButton
LinkButtonEdit.CommandArgument = UserReader("fldClaimPmtID")
LinkButtonEdit.OnClientClick = "LinkButtonEdit_OnClick"
LinkButtonEdit.Text = "EDIT"
CellDescriptionEdit.Controls.Add(LinkButtonEdit)

Then the sub looks like this...

Protected Sub LinkButtonEdit_OnClick(sender As Object, e As EventArgs)
   'Lots of happy code but for example purposes let's use this...        
    lblTest.Text = Int32.Parse(btn.CommandArgument)
End Sub

Any idea how I can get this to work?

In the `lblTest.Text = (here)` line. But @LarsTech, isn't `Int32.Parse(DirectCast(sender, LinkButton).CommandArgument)` the correct approach in VB.NET? — Visual Vincent, Aug 11 '15 at 18:44
I can't seem to get it to work. I've changed it to: Protected Sub LinkButtonEdit_OnClick(sender As Object, e As EventArgs) 'Lots of happy code but for example purposes let's use this... lblTest.Text = Int32.Parse(DirectCast(sender, LinkButton).CommandArgument) End Sub — Jerry Sweet, Aug 11 '15 at 18:49
It doesn't change. Nothing seems to happen. I'm creating the table in page_load. Would that have something to do with it? — Jerry Sweet, Aug 11 '15 at 19:06

score 1 · Accepted Answer · edited May 23 '17 at 12:14

1

To add eventhandlers to your controls you have use the AddHandler statement:

AddHandler LinkButtonEdit.OnClientClick, AddressOf LinkButtonEdit_OnClick

So replace this:

LinkButtonEdit.OnClientClick = "LinkButtonEdit_OnClick"

With the code at the top.

This is also something to consider looking at if you use ASP.NET: Dynamically Added DropDownlists Are Not Firing SelectedIndexChanged Event

edited May 23 '17 at 12:14

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answered Aug 11 '15 at 19:22

Visual Vincent

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I need to dynamically create a control with variable and pass variable to sub

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