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Row.Cells.Text empty when bind Gridviewheader row to Table Row

Posted on 2013-01-04
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Last Modified: 2013-01-11
                ' Create a table to contain the grid
                Dim objtable As New Table()

                ' add the header row to the table
                If grdview.HeaderRow IsNot Nothing Then
                    objtable.Rows.Add(grdview.HeaderRow)
                End If	
			
                ' add each of the data rows to the table
                For Each row As GridViewRow In grdview.Rows
                    objtable.Rows.Add(row)
                Next

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I use snapshot above to bind gridview to a table however on boundfield of the gridview the cells.text return empty.
eg. objtable.rows(0).cells(0).Text returns empty (header position row 0) however for the rest of the rows I can get text objtable.rows(1).cells(0).Text etc

How can I get the gridview header text data. it seems to work sometimes for template field itemdata.
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Question by:crashjam
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5 Comments
 
LVL 23

Expert Comment

by:Roopesh Reddy
ID: 38746011
Hi,

How you configured you HeaderRow in the GridView?

I have a GridView like this -

 <asp:GridView runat="server" ID="gridView"  AutoGenerateColumns="false">
        <Columns>
            <asp:TemplateField HeaderText="A" >
                <ItemTemplate>
                    <asp:Label Text='<%#Eval("Name")%>' runat="server" />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="B">
                <ItemTemplate>
                    <asp:TextBox runat="server" ID="txt1"  />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="C">
                <ItemTemplate>
                    <asp:TextBox runat="server" ID="txt2" CssClass="myCss" />
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>

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and this code seems to be working fine -

Dim table As New Table()
table.Rows.Add(gridView.HeaderRow)

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Hope it helps u...
0
 

Author Comment

by:crashjam
ID: 38746289
The issue is when AllowSorting="True" the GridView Column (if a SortExpression) becomes an hyperlink and the Text column becomes empty.

example below RecordID Boundfield will be empty for Gridview headerrow
when objtable.rows(0).cells(0).Text is used.

<asp:GridView runat="server" ID="gridView"  AutoGenerateColumns="false" AllowPaging="True" AllowSorting="True">
        <Columns>
<asp:BoundField DataField ="RecordID" HeaderText="RecordID" SortExpression="RecordID" />
            <asp:TemplateField HeaderText="A" >
                <ItemTemplate>
                    <asp:Label Text='<%#Eval("Name")%>' runat="server" />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="B">
                <ItemTemplate>
                    <asp:TextBox runat="server" ID="txt1"  />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="C">
                <ItemTemplate>
                    <asp:TextBox runat="server" ID="txt2" CssClass="myCss" />
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>

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.
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LVL 23

Expert Comment

by:Roopesh Reddy
ID: 38749800
Hi,

Moreover, since you are using asp:TemplateField , then you may have to use FindControl instead of Text!

http://forums.asp.net/t/1736121.aspx/1

Some thing like this -

Dim txtBox As TextBox = TryCast(gridView.Rows(i).FindControl("txt1"), TextBox)
txtBox.Text - > Retrieves the text

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Hope it helps u...
0
 

Accepted Solution

by:
crashjam earned 0 total points
ID: 38750073
To get the gridview headertext even if the column is set as sortable the following modification was done to the code by dynamically building a datarow.

' Create a table to contain the grid
Dim objtable As New Table()

Dim objDataRow As New TableRow

' add the header row to the table
If grdview.HeaderRow IsNot Nothing Then
	Dim headertext1 As String = String.Empty
	Dim rowi As Integer = 0

	For rowi = 0 To grdview.Columns.Count - 1
		headertext1 = grdview.Columns(rowi).HeaderText
		Dim objTableCell As New TableCell
		objTableCell.Text = headertext1
		objDataRow.Cells.Add(objTableCell)	
	Next					
	objtable.Rows.Add(objDataRow)
End If	

' add each of the data rows to the table
For Each row As GridViewRow In grdview.Rows
	objtable.Rows.Add(row)
Next

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0
 

Author Closing Comment

by:crashjam
ID: 38766444
Building the TableRow TableCell to get the HeaderText from looping though the gridview's column is a method that's safe to get the headertext even if the column is sortable.
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