Datagrid Postback issues

[Bob Trabucco]

Hello all,

I have a Datagrid on a page. 1 column is a template column with a checkbox
(unbound). The rest of the columns are databound that are added
programatically.

If in the Page_Load I do:


If IsPostBack Then

else

end if

BIND DATA HERE



Then the grid displays correctly every time but the checkboxes are always
cleared so I can never check them.

If I do this...

If IsPostBack Then

else
BIND DATA HERE
end if

The grid posts back the first time but the second pass the grid is empty!

Any clues to what I am doing wrong?

Thanks in advance,
Bob

 

[Ather Ali Shaikh]

are you using the checkbox attribute AutoPostBack = True
make it False.

if it is required to make true then set the code

If IsPostBack Then

else
BIND DATA HERE
end if

Regards
Ather Ali Shaikh

 

[Bob Trabucco]

Thanks for the response but it still isn't working correctly... More
details....

Grid Definition...

<asp:datagrid id="dgEquipment" tabIndex="50" runat="server"
Width="664px" BackColor="White" BorderColor="#CCCCCC"
ToolTip="Equipment at this location" EnableViewState="true"
PageSize="9999" CellPadding="3"
AutoGenerateColumns="False" BorderWidth="1px" BorderStyle="None">
<SelectedItemStyle Font-Size="Smaller" Font-Names="Arial"
Font-Bold="True" ForeColor="White" BackColor="#669999"></SelectedItemStyle>
<EditItemStyle Font-Size="Larger" Font-Names="Arial"></EditItemStyle>
<AlternatingItemStyle Font-Size="XX-Small"
Font-Names="Arial"></AlternatingItemStyle>
<ItemStyle Font-Size="XX-Small" Font-Names="Arial"
ForeColor="#000066"></ItemStyle>
<HeaderStyle Font-Size="Smaller" Font-Names="Arial" Font-Bold="True"
ForeColor="Black" BackColor="#D3F2FE"></HeaderStyle>
<FooterStyle ForeColor="#000066" BackColor="White"></FooterStyle>
<Columns>
<asp:TemplateColumn>
<ItemTemplate>
<asp:CheckBox runat="server" AutoPostBack="false"></asp:CheckBox>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
<PagerStyle Font-Size="Smaller" Font-Names="Arial"
HorizontalAlign="Left" ForeColor="#000066"
BackColor="White" Mode="NumericPages"></PagerStyle>
</asp:datagrid>

Private Sub InitGrid()

' Add the columns programmatically since we will eventually let the
users define which columns are displayed...
If dgEquipment.Columns.Count <= 1 Then

Dim col As BoundColumn

col = New BoundColumn
col.HeaderText = "Counter"
col.HeaderStyle.HorizontalAlign = HorizontalAlign.Center
col.ItemStyle.HorizontalAlign = HorizontalAlign.Left
col.DataField = "Counter"
col.ItemStyle.Font.Size = System.Web.UI.WebControls.FontUnit.XXSmall
col.Visible = False
dgEquipment.Columns.Add(col)

col = New BoundColumn
col.HeaderText = "Make"
col.HeaderStyle.HorizontalAlign = HorizontalAlign.Center
col.ItemStyle.HorizontalAlign = HorizontalAlign.Left
col.DataField = "MFG"
col.ItemStyle.Font.Size = System.Web.UI.WebControls.FontUnit.XXSmall
dgEquipment.Columns.Add(col)

col = New BoundColumn
col.HeaderStyle.HorizontalAlign = HorizontalAlign.Center
col.ItemStyle.HorizontalAlign = HorizontalAlign.Left
col.HeaderText = "Model"
col.DataField = "MODEL"
col.ItemStyle.Font.Size = System.Web.UI.WebControls.FontUnit.XXSmall
dgEquipment.Columns.Add(col)

col = New BoundColumn
col.HeaderStyle.HorizontalAlign = HorizontalAlign.Center
col.ItemStyle.HorizontalAlign = HorizontalAlign.Left
col.HeaderText = "Serial #"
col.DataField = "SERIAL"
col.ItemStyle.Font.Size = System.Web.UI.WebControls.FontUnit.XXSmall
dgEquipment.Columns.Add(col)

col = New BoundColumn
col.HeaderStyle.HorizontalAlign = HorizontalAlign.Center
col.ItemStyle.HorizontalAlign = HorizontalAlign.Right
col.HeaderText = "Install Date"
col.DataField = "INSTALL"
col.DataFormatString = "{0:d}"
col.ItemStyle.Font.Size = System.Web.UI.WebControls.FontUnit.XXSmall
dgEquipment.Columns.Add(col)

col = New BoundColumn
col.HeaderStyle.HorizontalAlign = HorizontalAlign.Center
col.ItemStyle.HorizontalAlign = HorizontalAlign.Right
col.HeaderText = "Warranty"
col.DataField = "Warranty"
col.DataFormatString = "{0:d}"
col.ItemStyle.Font.Size = System.Web.UI.WebControls.FontUnit.XXSmall
dgEquipment.Columns.Add(col)

col = New BoundColumn
col.HeaderStyle.HorizontalAlign = HorizontalAlign.Center
col.ItemStyle.HorizontalAlign = HorizontalAlign.Right
col.HeaderText = "Agreement #"
col.DataField = "SerAgrNo"
col.ItemStyle.Font.Name = "Arial"
col.ItemStyle.Font.Size = System.Web.UI.WebControls.FontUnit.XXSmall
dgEquipment.Columns.Add(col)

End If
End Sub

Private Sub LoadGrid()

' Equipment Grid

Dim equip As New clsEquip
equip.InitDBConnection(Session("ConnectionString"))
equip.Load(Session("CustNo"), Session("LocNo"))
dgEquipment.DataSource = equip

DataBind()

equip = Nothing

End Sub


With the following the grid displays all the data and the checkbox
correctly. But when I click any button on the screen any checks I have made
are cleared so I can't check and see what the user checked....

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load

If IsPostBack Then

' Do some stuff here

Else

' Do other stuff here

End If

InitGrid()
LoadGrid()

Exit Sub


With this one the second time around the grid is empty except for the
checkbox column...

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load


If IsPostBack Then

' Do some stuff here

Else

' Do other stuff here
InitGrid()
LoadGrid()
End If


Exit Sub


I am sure I am just missing something. Thanks in advance!

Bob