如何从GridViewRow投射WebControl

Question

I have some GridView with a changing amount of Columns. Just the last column is always the same, but they don't have the same name.

<asp:GridView>
    <%-- columns are here--%>
    <asp:TemplateField>
        <ItemTemplate>
            <asp:LinkButton>
            </asp:LinkButton>
        </ItemTemplate>
    </asp:TemplateField>
</asp:GridView>

Now I loop trough my page to disable all the controls on a specific status:

public static void disableControls(ContentPlaceHolder cph)
{

    foreach (Control c in cph.Controls)
    {
        disableControl(c);
        foreach (Control c2 in c.Controls)
        {
    //and so on, this goes until 20 controls deep
        }
    }
}

and in my disableControl() I check for all types ( TextBox , Button etc) and then I disable them. The onliest exception are the GridView s. Because if I disable them they aren't scrollable anymore. So i tried to keep the GridView s enabled and just loop through the rows and try to cast every cell to a LinkButton to disable it. Because somehow they don't get disabled trough my normal loop with all the controls and its childcontrols. But this also doesn't work, because they never get casted. What I tried till now (and didn't work):

Try 1:

foreach (GridViewRow gvr in gv.Rows)
{
    if (gvr.RowType == DataControlRowType.DataRow)
    {
        for (int i = 0; i < gv.Columns.Count; i++)
        {
            try
            {
                System.Web.UI.WebControls.LinkButton lb = (System.Web.UI.WebControls.LinkButton)gvr.Cells[i].Controls[0];
                lb.Enabled = false;
             }
             catch(Exception)
             {}              
        }
    }
}

Try 2:

foreach (GridViewRow gvr in gv.Rows)
{
    foreach (TableCell cell in gvr.Cells)
    {
        foreach (Control con in cell.Controls)
        {
            try
            {
                System.Web.UI.WebControls.LinkButton lb = (System.Web.UI.WebControls.LinkButton)con;
                lb.Enabled = false;
            }
            catch (Exception)
            { }
        }
    }
}

How can I make sure that the LinkButton s in the GridView s get disabled, but the GridView itself not?

Btw: What came to my mind after writing all this long text: Is it possible that "Parent"-Controls(The GridViews) Enabled -Status overwrites the "Child"-Controls-Enabled-Status?!

Answer 1

The issue is your check assumes it's a linkbutton, but you type check the control first:

if (lb is System.Web.UI.WebControls.LinkButton)
{
    ((System.Web.UI.WebControls.LinkButton)con).Enabled = false
}

You can also type check on WebControl, and disable all web controls that way too.

Answer 2

I went around it with manually disabling all controls (looping through the panel-children & its children etc, recursively) of the panels

Somehow the "scrollable"-function doesn't gets lost if you set all WebControls by hand to disabled, if you set only the Panel to disabled it gets inherited and the "scrollable"-function of the GridView gets lost.