Hi Team,

I am getting error "Object reference not set to an instace of a object" error when I am trying to access any control on the aspx page after adding or deleting a row from a WebDataGrid. Can somebody please let me know what might be the issue?

What is the issur in the below function?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

public 

 

 

void  GetDropdownCategories()

{_db =

 

DatabaseFactory.CreateDatabase("ISDBConnectionString");

_user =

 

WindowsIdentity.GetCurrent().Name;

 

 

 

DataSet oDs = new DataSet();

 

 

 

DbCommand cmd = _db.GetStoredProcCommand("usp_TSS_Category_S");

cmd.CommandType =

 

CommandType.StoredProcedure;

cmd.Connection = GetISDBConnection();

oDs = _db.ExecuteDataSet(cmd);

 

 

 

 

wddCategory.DataSource = oDs;

wddCategory.TextField =

 

"Category";

wddCategory.ValueField =

 

"CategoryId";

}

The ASPX page is shown below:

<

 

 

body>

 

 

 

<form id="form1" runat="server">

 

 

 

<ig:WebScriptManager ID="WebScriptManager1" runat ="server">

 

 

 

</ig:WebScriptManager>

 

 

 

 

<asp:UpdatePanel ID="up1" runat="server">

 

 

 

<ContentTemplate>

 

 

 

<!--#BEGIN SNIPPET#-->

 

 

 

<asp:ObjectDataSource ID="objCategory" runat="server"

 

 

 

SelectMethod="GetCategories"

 

 

 

UpdateMethod

="UpdateCategory"

 

 

 

InsertMethod

="AddCategory"

 

 

 

DeleteMethod="DeleteCategory"

 

 

 

 

TypeName

="TechnologyServies.Maintenance.ApplicationService">

 

 

 

<UpdateParameters

>

 

 

 

<asp:Parameter Name="categoryId" Type="String" />

 

 

 

<asp:Parameter Name="category" Type="String" />

 

 

 

</UpdateParameters

>

 

 

 

<InsertParameters

>

 

 

 

<asp:Parameter Name="category" Type="String" />

 

 

 

</InsertParameters

>

 

 

 

<DeleteParameters

>

 

 

 

<asp:Parameter Name="categoryId" Type="String"

/>

 

 

 

</DeleteParameters

>

 

 

 

</asp:ObjectDataSource>

 

 

 

<table

>

 

 

 

<tr

>

 

 

 

<td

>

 

 

 

<asp:Label ID="lblCategoryStatus1" runat="server" SkinID="h6" Text="Test" ></asp:Label

>

 

 

 

</td

>

 

 

 

</tr

>

 

 

 

<tr>

 

 

 

<td

>

 

 

 

<ig:WebDataGrid ID="wdgCategory" runat="server"

 

 

 

AutoGenerateColumns="false" DataSourceID="objCategory" DataKeyFields="CategoryId" Width="350px" >

 

 

 

<Behaviors

>

 

 

 

<ig:Activation/>

 

 

 

<ig:EditingCore Enabled="true" AutoCRUD

="true">

 

 

 

<Behaviors

>

 

 

 

<ig:RowAdding

>

 

 

 

 

<ColumnSettings

>

 

 

 

<ig:RowAddingColumnSetting ColumnKey="CategoryId" ReadOnly="true"

/>

 

 

 

</ColumnSettings

>

 

 

 

<AddNewRowClientEvents

/>

 

 

 

</ig:RowAdding>

 

 

 

 

 

<ig:RowDeleting

/>

 

 

 

 

<ig:CellEditing

>

 

 

 

<ColumnSettings

>

 

 

 

<ig:EditingColumnSetting ColumnKey="CategoryId" ReadOnly="true"

/>

 

 

 

</ColumnSettings

>

 

 

 

</ig:CellEditing

>

 

 

 

</Behaviors

>

 

 

 

</ig:EditingCore

>

 

 

 

 

<ig:ColumnFixing

/>

 

 

 

<ig:ColumnMoving

/>

 

 

 

<ig:ColumnResizing

/>

 

 

 

<ig:Paging PageSize

="5"/>

 

 

 

<ig:Selection CellClickAction="Row" RowSelectType="Multiple" ColumnSelectType

="Multiple"/>

 

 

 

<ig:RowSelectors RowNumbering="true"

/>

 

 

 

 

</Behaviors>

 

 

 

<Columns

>

 

 

 

<ig:BoundDataField DataFieldName="CategoryId" Key="CategoryId" Header-Text="Category Id" Width

="90px"/>

 

 

 

<ig:BoundDataField DataFieldName="Category" Key="Category" Header-Text="Category" Width="150px"

/>

 

 

 

</Columns

>

 

 

 

</ig:WebDataGrid>

 

 

 

</td

>

 

 

 

</tr

>

 

 

 

</table>

 

 

 

</ContentTemplate

>

 

 

 

</asp:UpdatePanel

>

 

 

 

 

<!--#END SNIPPET#-->

 

 

 

<div style="border-left: 0px; padding: 0px; width

: 350px">

 

 

 

<asp:Button ID="btnSaveData" ClientIDMode="Static" runat="server" CssClass="batch-buttons" Text="Save Category"

/>

 

 

 

<!--<asp:Button ID="btnDefaultData" runat="server" CssClass="batch-buttons" Text="Cancel" CommandName="Cancel" /> -->

 

 

 

</div

>

 

 

 

 

 

 

 

<div

>

 

 

 

<table>

 

 

 

<tr

>

 

 

 

<td

>

 

 

 

<asp:Label ID="lblCategory" runat="server" Text="Category" SkinID="h4"></asp:Label> </td

>

 

 

 

<td>

 

 

 

<ig:WebDropDown ID="wddCategory" runat="server" Width="200px" CurrentValue="Select Category"

 

 

 

DropDownContainerWidth="300px" >

 

 

 

 

</ig:WebDropDown

>

 

 

 

</td

>

 

 

 

</tr

>

 

 

 

 

</table

>

 

 

 

</div>

 

 

 

 

</form

>

</

 

 

body>

Thanks,

pufftuff