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Kevin
1315
Client Side Data Binding From Page Method
posted

I trying to DataBind to a WebDataGrid from the client side from a page method.  I'm really close but I'm getting the following error message:

Unable to get value of the property  set_dataSource  object is null or undefined

Here is my form file contents:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="ztest2.aspx.vb" Inherits="labor.ztest2" %>
<%@ Register assembly="Infragistics35.Web.v11.1, Version=11.1.20111.2178, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb" namespace="Infragistics.Web.UI.LayoutControls" tagprefix="ig" %>
<%@ Register assembly="Infragistics35.Web.v11.1, Version=11.1.20111.2178, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb" namespace="Infragistics.Web.UI.GridControls" tagprefix="ig" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head id="Head1" runat="server">
 <script type="text/javascript" src="jquery-1.7.1.js"></script>
 <title></title>
</head>

<script type="text/javascript">
   
    var tabelem = null;
    function WebTab1_SelectedIndexChanging(sender, eventArgs)
        {
            var tabnum = eventArgs.get_tabIndex();
            var tab = $find("WebTab1");
            var tabid = tab.get_tabs()[tabnum];
            var tabfield = null;

            if (tabnum == 0)
            {
                tabfield = tabid.findChild('qty1');
                tabelem = tabfield;
                window.setTimeout('try{tabelem.focus();}catch(ex){}', 1);
            } 
                     
            if (tabnum == 1)
            {
                tabfield = tabid.findChild('qty2');
                tabelem = tabfield;
                window.setTimeout('try{tabelem.focus();}catch(ex){}', 1);
            }
           
            if (tabnum == 2)
            {
                tabfield = tabid.findChild('qty3');
                tabelem = tabfield;
                window.setTimeout('try{tabelem.focus();}catch(ex){}', 1);
            }
        }

    function QtyChange()
        {
            var totsale, qty, price;
            var parms;

            totsale = 0;
            qty = 0;
            price = 0;
            parms = "";

            qty = $get('<%=qty1.ClientID%>').value;
            price = $get('<%=price1.ClientID%>').value;
            totsale = qty * price;
            document.getElementById("<%=totsale1.ClientID%>").value = totsale;

            parms = '{"qty":"' + qty + '"}';

            $.ajax({ type: "POST", url: "ztest2.aspx/QtyMsg", data: parms, contentType: "application/json; charset=utf-8", datatype: "json",
                     success: function(datatable)
                     {
                      var qtygrid = $find("WebDataGrid1");
                      qtygrid.set_dataSource(datatable.d);
                      qtygrid._pi.show(qtygrid);
                      qtygrid.applyClientBinding();
                      qtygrid._pi.hide(qtygrid);
                     }
            });
        }       

      
</script>

<body>

<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="True"></asp:ScriptManager>
<table>
 <tr>
  <td>
   <ig:WebTab ID="WebTab1" runat="server" Height="400px" Width="650px">
    <tabs>
        <ig:ContentTabItem runat="server" Text="Sales Scenario 1">
            <Template>
             <br />
             <table>
              <tr>
               <td><asp:Label ID="Label1" runat="server" Font-Bold="True" Text="Quantity"></asp:Label></td>
               <td><asp:TextBox ID="qty1" runat="server" Font-Bold="True" Font-Names="Arial" TabIndex="1" Width="70px"></asp:TextBox></td>
               <td>&nbsp;&nbsp;</td>
               <td><asp:Label ID="Label2" runat="server" Font-Bold="True" Text="Price"></asp:Label></td>
               <td><asp:TextBox ID="price1" runat="server" Font-Bold="True" Font-Names="Arial" TabIndex="2" Width="70px"></asp:TextBox></td>
               <td>&nbsp;&nbsp;</td>
               <td><asp:Label ID="Label3" runat="server" Font-Bold="True" Text="Total Sales"></asp:Label></td>
               <td><asp:TextBox ID="totsale1" runat="server" Font-Bold="True" Font-Names="Arial" TabIndex="3" Width="70px" BackColor="PaleGoldenrod"></asp:TextBox></td>
              </tr>
             </table>
            </Template>
        </ig:ContentTabItem>
        <ig:ContentTabItem runat="server" Text="Sales Scenario 2" Hidden="True">
            <Template>
             <br />
             <table>
              <tr>
               <td><asp:Label ID="Label4" runat="server" Font-Bold="True" Text="Quantity"></asp:Label></td>
               <td><asp:TextBox ID="qty2" runat="server" Font-Bold="True" Font-Names="Arial" TabIndex="5" Width="70px"></asp:TextBox></td>
               <td>&nbsp;&nbsp;</td>
               <td><asp:Label ID="Label5" runat="server" Font-Bold="True" Text="Price"></asp:Label></td>
               <td><asp:TextBox ID="price2" runat="server" Font-Bold="True" Font-Names="Arial" TabIndex="6" Width="70px"></asp:TextBox></td>
               <td>&nbsp;&nbsp;</td>
               <td><asp:Label ID="Label6" runat="server" Font-Bold="True" Text="Total Sales"></asp:Label></td>
               <td><asp:TextBox ID="totsale2" runat="server" Font-Bold="True" Font-Names="Arial" TabIndex="7" Width="70px" BackColor="PaleGoldenrod" ReadOnly="true"></asp:TextBox></td>
              </tr>
             </table>
            </Template>       
        </ig:ContentTabItem>
        <ig:ContentTabItem runat="server" Text="Sales Scenario 3" Hidden="True">
            <Template>
             <br />
             <table>
              <tr>
               <td><asp:Label ID="Label7" runat="server" Font-Bold="True" Text="Quantity"></asp:Label></td>
               <td><asp:TextBox ID="qty3" runat="server" Font-Bold="True" Font-Names="Arial" TabIndex="9" Width="70px"></asp:TextBox></td>
               <td>&nbsp;&nbsp;</td>
               <td><asp:Label ID="Label8" runat="server" Font-Bold="True" Text="Price"></asp:Label></td>
               <td><asp:TextBox ID="price3" runat="server" Font-Bold="True" Font-Names="Arial" TabIndex="10" Width="70px"></asp:TextBox></td>
               <td>&nbsp;&nbsp;</td>
               <td><asp:Label ID="Label9" runat="server" Font-Bold="True" Text="Total Sales"></asp:Label></td>
               <td><asp:TextBox ID="totsale3" runat="server" Font-Bold="True" Font-Names="Arial" TabIndex="11" Width="70px" BackColor="PaleGoldenrod" ReadOnly="true"></asp:TextBox></td>
              </tr>
             </table>
            </Template>       
        </ig:ContentTabItem>
    </tabs>
    <ClientEvents SelectedIndexChanging="WebTab1_SelectedIndexChanging" />
   </ig:WebTab>
  </td>
  <td>&nbsp;&nbsp;</td>
  <td>
   <ig:WebTab ID="WebTab2" runat="server" Height="400px" Width="650px">
    <tabs>
        <ig:ContentTabItem runat="server" Text="Grid Display 1">
            <Template>
             <br />
             <table>
              <tr>
               <td><ig:WebDataGrid ID="WebDataGrid1" runat="server" Height="150px" Width="500px" /></td>
              </tr>
              <tr>
               <td>&nbsp;</td>
              </tr>
              <tr>
               <td><ig:WebDataGrid ID="WebDataGrid2" runat="server" Height="150px" Width="500px" /></td>
              </tr>            
             </table>
            </Template>
        </ig:ContentTabItem>
    </tabs>
   </ig:WebTab>
  </td>
 </tr>
</table>
<br />
<asp:Button ID="salebutt" runat="server" Text="New Sales Scenario" Font-Bold="True" />

</form>

</body>

</html>


And here is my code behind:


Imports System.Web.Script.Serialization
Imports Infragistics.Web.UI.GridControls
Imports Infragistics.Web.UI.LayoutControls

Partial Public Class ztest2
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        Dim confocus, jsfocus As String

        confocus = qty1.ClientID
        jsfocus = "window.setTimeout(""try{document.getElementById('" & confocus & "').focus();} catch(e){}"",1000);"
        ScriptManager.RegisterClientScriptBlock(Me, Me.GetType(), "TabFocusKey", jsfocus, True)

        qty1.Attributes.Add("onchange", "BLOCKED SCRIPTQtyChange()")

    End Sub

    Protected Sub salebutt_Click(ByVal sender As Object, ByVal e As EventArgs) Handles salebutt.Click

        Dim tabflag As String

        tabflag = ""

        If WebTab1.Tabs(1).Hidden = True Then
            tabflag = "Y"
            WebTab1.Tabs(1).Hidden = False
            totsale2.BackColor = Drawing.Color.PaleGoldenrod
            totsale2.Font.Bold = True
        End If
        If WebTab1.Tabs(2).Hidden = True And Len(Trim(tabflag)) = 0 Then
            tabflag = "Y"
            WebTab1.Tabs(2).Hidden = False
            totsale3.BackColor = Drawing.Color.PaleGoldenrod
            totsale3.Font.Bold = True
        End If

    End Sub

    <System.Web.Services.WebMethod()> _
    Public Shared Function QtyMsg(ByVal qty As String) As String

        Dim serializer As JavaScriptSerializer = New JavaScriptSerializer
        Dim tabrows As New List(Of Dictionary(Of String, Object))
        Dim tabrow As Dictionary(Of String, Object)
        Dim dtrow As DataRow
        Dim dttab As New DataTable()

        If IsNumeric(qty) Then
        Else
            qty = 0
        End If

        dttab.Columns.Add("Quantity Message", System.Type.GetType("System.String"))
        dtrow = dttab.NewRow

        If CDec(qty) <= 500 Then
            dtrow(0) = "Quantity Less Than Equal To 500"
        End If
        If (CDec(qty) >= 501 And CDec(qty <= 1000)) Then
            dtrow(0) = "Quantity Is Between 501 And 1000"
        End If
        If (CDec(qty) >= 1001 And CDec(qty <= 1500)) Then
            dtrow(0) = "Quantity Is Between 1001 And 1500"
        End If
        If (CDec(qty) >= 1501 And CDec(qty <= 2000)) Then
            dtrow(0) = "Quantity Is Between 1501 And 2000"
        End If
        If CDec(qty) >= 2001 Then
            dtrow(0) = "Quantity Over What We Expected!!!"
        End If

        dttab.Rows.Add(dtrow)

        For Each dr As DataRow In dttab.Rows
            tabrow = New Dictionary(Of String, Object)

            For Each dc As DataColumn In dttab.Columns
                tabrow.Add(dc.ColumnName, dr(dc))
            Next

            tabrows.Add(tabrow)
        Next

        Return serializer.Serialize(tabrows)

    End Function

End Class


What am I missing?  I'm on version 11.1

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