How to check if a GridView contains a certain Button asp.net c#

Question

hi i would like to know how can i check if any of the reviewBtn is visible in the gridview and if ANY reviewBtn is present, btn_reviewAll will be visible.

currently the code below only shows the btn_reviewAll when ALL reviewBtn is visible. pls advise thanks!

foreach (GridViewRow row in GridViewReview.Rows)
{
    Control reviewBtn = row.FindControl("ButtonReview") as Button;

    if (reviewBtn.Visible == true)
    {
       btn_reviewAll.Visible = true;
    }
    else
    {
       btn_reviewAll.Visible = false;
    }
}

Add a breakpoint at reviewBtn.Visible and view in Quickwatch what value you are getting for this control. — Suprabhat Biswal
– Suprabhat Biswal, Commented Sep 29, 2015 at 6:37

shreesha · Accepted Answer · 2015-09-29 06:43:46Z

4

change your code like this

foreach (GridViewRow row in GridViewReview.Rows)
{
    Control reviewBtn = row.FindControl("ButtonReview") as Button;

    if (reviewBtn.Visible == true)
    {
         btn_reviewAll.Visible = true;
         break;
    }
    else
    {
       btn_reviewAll.Visible = false;
    }
}

what it does is when one reviewBtn is visible it will set btn_reviewAll to visible and break out the foreach loop

answered Sep 29, 2015 at 6:43

shreesha

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Comments

Rahul Singh · Accepted Answer · 2015-09-29 06:54:08Z

1

@Shreesha's answer is absolutely correct, you can also do with less code using LINQ like this:-

if (GridViewReview.Rows.OfType<GridViewRow>()
                  .Any(b => ((Button)b.FindControl("ButtonReview")).Visible))
      btn_reviewAll.Visible = true;
else
      btn_reviewAll.Visible = false;

answered Sep 29, 2015 at 6:54

Rahul Singh

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