Unable to retrieve value of the gridview column after making it invisible

I have a gridview say gv1 . Which has 5 columns. I bind the gridview on the change of a dropdown selection. Aft开发者_如何学运维er binding I make the 4th(gv1.column[3]) and 5th(gv1.column[4])column visible false.

gv1.Columns[3].Visible = false;
gv1.Columns[4].Visible = false;

I am unable to access the column value(these are id's) later. I tried making it visible before accessing still in vain.

{
    gv1.Columns[3].Visible = True;
    gv1.Columns[4].Visible = True;

    int id = Convert.ToInt32(row.Cells[4].Text.ToString().Trim());
}

I get the error at 'id' "Input string was not in a correct format." I found ,All the column for each value is having null value.

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Hai avi,

Look at this it may be useful GridViewHideColumn and access its value..

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You can do one work around.

Because when you set the grid visibility in the server side as INVISIBLE.

The gridview wont be rendered in during the next post back.

So Keep the Grid view in the Div tag. And make the DIV tag style invisible.

So that you can access the gridview value as you like @ the sametime the grid is not visible to the page users.

....