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Delete Parameter - Value cannot be null. Parameter name g.

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Grid

This is a migrated thread and some comments may be shown as answers.

Gullo asked on 13 Feb 2012, 11:17 AM

Hi,

I have the following problem, in my RadGrid i have the operation update select and delete. Update and Select works fine. but the delete operation give me always the error that the parameter is null.

this is my grid

<telerik:RadGrid ID="radGrid1" AutoGenerateEditColumn="True" DataSourceID="objectDataSource1"

runat="server" GridLines="None" Skin="Office2010Blue" AutoGenerateColumns="False">

<MasterTableView AllowAutomaticUpdates="True" AllowAutomaticDeletes="True" CommandItemDisplay="Top" DataSourceID="ObjectDataSource1">

<CommandItemSettings ShowAddNewRecordButton="false" />

<Columns>

<telerik:GridEditCommandColumn ButtonType="ImageButton" UniqueName="EditCommandColumn">

<ItemStyle CssClass="MyImageButton" />

</telerik:GridEditCommandColumn>

<telerik:GridDropDownColumn DataField="AddressType" DataSourceID="objectDataSource1"

HeaderText="Category" ListTextField="AddressType" ListValueField="AddressType"

UniqueName="AddressType">

</telerik:GridDropDownColumn>

<telerik:GridDropDownColumn DataField="CategoryType" DataSourceID="objectDataSource1"

HeaderText="CategoryType" ListTextField="CategoryType" ListValueField="CategoryType"

UniqueName="CategoryType">

</telerik:GridDropDownColumn>

<telerik:GridDateTimeColumn DataField="NotificationDate" HeaderText="NotificationDate"

UniqueName="NotificationDate" />

<telerik:GridCheckBoxColumn DataField="NoticeOfReceipt" UniqueName="NoticeOfReceipt"

HeaderText="NoticeOfReceipt" />

<telerik:GridBoundColumn DataField="id" HeaderText="id" SortExpression="id" UniqueName="id" />

<telerik:GridButtonColumn ConfirmText="Delete this product?" ConfirmDialogType="RadWindow"

ConfirmTitle="Delete" ButtonType="ImageButton" CommandName="Delete" Text="Delete"

UniqueName="DeleteColumn">

<ItemStyle HorizontalAlign="Center" CssClass="MyImageButton" />

</telerik:GridButtonColumn>

</Columns>

</MasterTableView>

</telerik:RadGrid>

and this is my datasource

<asp:ObjectDataSource ID="objectDataSource1" TypeName="ESTV.A3.Logic.AddressCaseRelationBll" SelectMethod="Select" UpdateMethod="Update" DeleteMethod="Delete"

runat="server">

<SelectParameters>

<asp:QueryStringParameter Name="addressId" Type="String" Direction="Input" QueryStringField="id">

</asp:QueryStringParameter>

</SelectParameters>

<UpdateParameters>

<asp:Parameter Name="id" Type="String" Direction="Input" />

<asp:Parameter Name="NotificationDate" Type="DateTime" />

<asp:Parameter Name="NoticeOfReceipt" Type="Boolean" />

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

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

</UpdateParameters>

<DeleteParameters>

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

</DeleteParameters>

</asp:ObjectDataSource>

in my DAO i have for the delete method the following code

public void Delete(string id)

{

Guid guidId = new Guid(id);

AddressCaseRelation addressCaseRelation = entityDao.GetById(guidId);

entityDao.Delete(addressCaseRelation);

entityDao.CommitChanges();

}

Regards

Delete Parameter - Value cannot be null. Parameter name g.

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