conditionally show hide asp.net Gridview column

You can use gridview pre-render method to set this...

protected void GridView_PreRender(object sender, EventArgs e)
    {
        if(Reqest.QueryString["Id"]=="all"&& Reqest.QueryString["Id"]!=null)
         {
           GridViewId.Columns[1].Visible = true;
         }
        else
            GridViewId.Columns[1].Visible = false;
    }

you can use gridview column index to hide the particular column

Code could be

 if(Request.QueryString.Get("show")=="all")
    GridView1.Columns[1].Visible=true;
 else
    GridView1.Columns[1].Visible=false;

More detail

GridView Hide Column by code

Edit 3

Settings in ASPX/ASCX can not be done directly.

<%= %> outputs directly to the response stream, and the asp markup is not part of the response stream. Its a mistake to assume the <%= %> operators are performing any kind of preprocessing on the asp markup.

More explanation

Why will <%= %> expressions as property values on a server-controls lead to a compile errors?

Edit 1

I think yes

 <asp:BoundField HeaderText="ColumnTwo" 
      Visible='<% if (Request.QueryString.Get("all") == "all" ) "true" else "false" %>'/>

You will have to check for the syntex

Edit 2

Try this

 Visible='<% Request.QueryString.Get("all") == "all"? "true": "false"%>'

Dear try to use RowDataBound event of Grid View like

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        //here apply your condition
        if(Request.QueryString["name"] == "all")
        e.Row.Cells[<index_of_cell>].Visible = true;
        else
        e.Row.Cells[<index_of_cell>].Visible = false;
    }
}

Try something like that.

Hope it works for you.