Intersoft Solutions - Community - WebGrid Enterprise - BindingOperationMode="ClientBinding" PrepareDataBinding doesn't run and grid show blank

BindingOperationMode="ClientBinding" PrepareDataBinding doesn't run and grid show blank

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using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data; using ISNet.WebUI.WebGrid; namespace TestWebGrid { public partial class Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void WebGrid1_InitializeDataSource(object sender, ISNet.WebUI.WebGrid.DataSourceEventArgs e) { DataTable dt = new DataTable(); dt.Columns.Add(new DataColumn("CustomerID", typeof(string))); dt.Columns.Add(new DataColumn("CompanyName", typeof(string))); dt.Columns.Add(new DataColumn("Phone", typeof(string))); //if (((ISNet.WebUI.WebGrid.WebGrid)(sender)).ActionName == PostBackAction.LoadData) //{ for (int i = 1; i <= 20; i++) dt.Rows.Add(new object[] { i.ToString(), "Company " + i.ToString(), "12345678" + i.ToString() }); //} e.DataSource = dt; } protected void WebGrid1_PrepareDataBinding(object sender, DataSourceEventArgs e) { WebGrid1.RetrieveStructure(); } } }

<%@ Register assembly="ISNet.WebUI.WebGrid" namespace="ISNet.WebUI.WebGrid" tagprefix="ISWebGrid" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <ISWebGrid:WebGrid ID="WebGrid1" runat="server" Height="250px" UseDefaultStyle="True" Width="500px" BindingOperationMode="ClientBinding" OnInitializeDataSource="WebGrid1_InitializeDataSource" OnPrepareDataBinding="WebGrid1_PrepareDataBinding"> <LayoutSettings AllowContextMenu="False" ContextMenuAnimation="False" AlwaysShowHelpButton="False"> </LayoutSettings> </ISWebGrid:WebGrid> </div> <div> </div> </form> </body> </html>

Yudi Member

Posted: January 22, 2015 8:08 AM in response to Alan Tran

I managed to resolve this by removing RetrieveStructure() from PrepareDataBinding and add it to OnLoad server-side event (such as shown in the following snippet code).

protected void WebGrid1_PrepareDataBinding(object sender, DataSourceEventArgs e)
{
    // remove RetrieveStructure from
    // PrepareDataBinding server-side event
    // WebGrid1.RetrieveStructure();
}

protected void WebGrid1_Load(object sender, EventArgs e)
{
    // invoke RetrieveStructure in
    // OnLoad server-side event
    WebGrid1.RetrieveStructure();
}

Hope this helps.

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Alan TranMember

Posted: January 23, 2015 3:09 AM in response to Yudi

Hi Judi,
Is this the issue of Webgrid or Is this by designed?
Because I have to manually add/remove columns in PrepareDataBinding method. So if do like your suggestion, I'll have to duplicate code in PrepareDataBinding to Webgrid_Load. And this is not the best practice (duplicate code everywhere). Otherwise I have a hundreds of forms need to migrate and because of this issue I'll have much work to do.
Beside in your proposal here, I can see the flow that client side binding call initalizadatasource -> preparedatabinding. But in fact, your webgrid didn't call preparedatabinding when turn on client side "ServerDataSource" mode. I think this is your webgrid bug and if it is, please add it to your issues and tell me about the hotfix that fixed this bug.

Regards

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Yudi Member

Posted: January 27, 2015 2:31 AM in response to Alan Tran

I will have this discussed with the WebGrid development team. I will get back to you with any news regarding this.

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