HI
Having read a few artivles on the following problem I am still not able to achieve the desired result.
Problem:
I have a dataview grid (actually a c1webgrid) displaying the contents of an SqlDataSource. The first time the page displays everything works fine and I can sort and page through the grid no problems.
The problem is that I want to limit the rows displayed based on other values on the web form. I just don't seem to be able to get the grid to reflect the changed datasource records. (It my be that the datasource doesn't actually change)
Here's the code:
Protected Sub DropDownList1_SelectedInde
'filter the data based on map set selected
strVehSQL_Where = " where veh_mapset = " & Me.DropDownList1.SelectedV
Me.T3Data.SelectCommand = strVehSQL & strVehSQL_Where & strVehSql_OrderBy
Me.T3Data.DataBind()
Me.C1WebGrid1.DataBind()
End Sub
The T3Data SqlDataSoiurce has an empty selectcommand - it is populated during page load as follows:
Me.T3Data.SelectCommand = strVehSQL & strVehSQL_Where & strVehSql_OrderBy
Me.T3Data.DataSourceMode = SqlDataSourceMode.DataSet
Me.C1WebGrid1.DataBind()
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Hi,
When set the select query and call the databind, it does not work because the databind only binds to the resultset available and setting the select query does not execute it. If you are using dataset or datatable, i would recommend using the rowfilter property on the defaultview of a datatable. For example
dTable.defaultview.rowfilt
C1Webgrid1.datasource=dTab
Hope it helps
Code Cruiser
CodeCruiser
Thanks for reply - I'm using an SqlDataSource which doesn't exxpose a DataTable. I have tried applying the filter to the SqlDataSource ( Me.T3Data.FilterExpression
For info the grid is refreshed on a timer and background data changes are being reflected by the grid, it just appears that changes to the select statement or filter conditions are being ignored
ian
Ian,
Check to make sure that the dropdownlist1.selectedvalu
me.T3Data.FilterExpression
Also, after setting the filterexpression in the code behind, call the T3Data.Select method which will force the execution of the select command with the filter.
Hi Codecruiser
Thanks for your message
OK I've made some progress but still don't have a solution - the following code (called in the dropdownlist selected ndexchanged event) proves 2 things - 1) the dropdownlist.value is valied and 2) the sqldatasource is getting updated - as the record count of the datavie is 2 as opposed to the unfiltered count of 96)
Me.Tr3Data.FilterExpressio
Me.T3Data.Select(New DataSourceSelectArguments(
Dim dv As System.Data.DataView
dv = CType(Me.T3Data.Select(New
Me.C1WebGrid1.DataBind()
but despite all that the grid still shows exactly the same as it did before the above code executed (i.e. the 96 records)
What am I missing?
I had already tried that - it actually took a step backwards which wasn't what I expected. It didn't sort out the problem and also disconnected all the automatic column sort & paging events. I think that is largely due to the fact that I have to de-link the DataSourceID (previously the SQLdataSource name) from the grid in order to link to the dataview as a DataSouce other wise I get an error saying the grid can't be linked to a DataSource and DatasouceID.
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Answer for Membership
by: RadicalSoftwareSolutionsPosted on 2008-08-28 at 23:09:39ID: 22342875
I thought it might help to include key parts of the aspx file
<asp:Content ID="Content2" ContentPlaceHolderID="Cont
<asp:SqlDataSource ID="Tracker3Data" runat="server"
ConnectionString="<%$ ConnectionStrings:Tracker3
</asp:SqlDataSource>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Label ID="Label1" runat="server" BorderColor="White" BorderWidth="6px"
Text="Select map set"></asp:Label>
<asp:DropDownList ID="DropDownList1" runat="server">
<asp:ListItem Selected="True" Value="0">All map sets</asp:ListItem>
<asp:ListItem Value="1">Map set 1</asp:ListItem>
<asp:ListItem Value="2">Map set 2</asp:ListItem>
<asp:ListItem Value="3">Map set 3</asp:ListItem>
<asp:ListItem Value="4">Map set 4</asp:ListItem>
<asp:ListItem Value="5">Map set 5</asp:ListItem>
</asp:DropDownList>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<C1WebGrid:C1WebGrid ID="C1WebGrid1" runat="server" AllowPaging="True"
AllowSorting="True" AutoGenerateColumns="False
BorderColor="#E7E7FF" BorderStyle="None" BorderWidth="1px" CellPadding="3"
DataKeyField="veh_ID" DataSourceID="Tracker3Data
PageSize="20" AllowAutoSize="True" DefaultRowHeight="20px" Width="1403px"
HorizontalAlign="Left">
<FooterStyle BackColor="#B5C7DE" ForeColor="#4A3C8C" />
<ItemStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" HorizontalAlign="Left" />
<Columns>
<C1WebGrid:C1ButtonColumn CommandName="Select" Text="Select"
AllowAutoSize="False" ButtonType="PushButton">
</C1WebGrid:C1ButtonColumn>
<C1WebGrid:C1BoundColumn DataField="veh_Regno" HeaderText="Regno"
SortExpression="veh_Regno"
</C1WebGrid:C1BoundColumn>
<C1WebGrid:C1BoundColumn DataField="veh_Description
SortExpression="veh_Descri
</C1WebGrid:C1BoundColumn>
</Columns>
<PagerStyle BackColor="#4A3C8C" ForeColor="#E7E7FF" HorizontalAlign="Right"
Mode="NumericPages" Position="TopAndBottom" />
<HeaderStyle BackColor="#4A3C8C" Font-Bold="True" ForeColor="#F7F7F7" />
<SelectedItemStyle BackColor="#738A9C" ForeColor="#F7F7F7" />
<AlternatingItemStyle BackColor="#F7F7F7" />
</C1WebGrid:C1WebGrid>
</ContentTemplate>
</asp:UpdatePanel>