Web Forms :: Toggle LinkButton In A GridView With A Loop
Jul 29, 2012
I am using GridView to display a list of forms submitted by a user and in one of the column I have a LinkButton which has got a conditional logic behind it to either display or hide it. The pseudo code for logic basically goes like this:If User has received a comment Show the link to the comment on the GridView. Else Hide LinkThis is the SQL that checks whether the user has got a comment for each submitted form:
Sql = "SELECT * FROM TableStudent INNER JOIN TableComment ON TableStudent .sID= TableComment .sID WHERE TableStudent .sID=@sID"
The SQL is working fine but I am having problem with looping through each form row to check if they have comment or not. Currently, the code hides the first row (correctly) but does not seem to be hiding the link for the following rows that does not have comments. I think my syntax for looping throw each row is incorrect.
For Each row As GridViewRow In gv1.Rows If ds.Tables(0).Rows.Count = 0 Then TryCast(gv1.Rows(0).FindControl("lnkBtnComment").FindControl("lnkBtnComment"), LinkButton).Visible = False Else TryCast(gv1.Rows(0).FindControl("lnkBtnComment").FindControl("lnkBtnComment"), LinkButton).Visible = True End IfNext
I revised the code as it seemed to be affecting only the first column and changed it to this:
For Each gvrow As GridViewRow In gv1.Rows If ds.Tables(0).Rows.Count = 0 Then TryCast(gvrow.FindControl("lnkDisplayComment"), LinkButton).Visible = False Response.Write(ds.Tables(0).Rows.Count) Else TryCast(gvrow.FindControl("lnkDisplayComment"), LinkButton).Visible = True Response.Write(ds.Tables(0).Rows.Count) End IfNext
Now the output for this has been if the associated form has any comment, it shows all the links and if the associated form has no comment, the comment links are hidden. And I have one applicant with two forms submitted; one of them has comment and the other does not. But my repsonse.write is returning 1 for both rows when I should clearly be 0 as it does not have any associated comment.
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