RadGrid Insert Item when Empty Grid

[Aleksander]

So I'm using a radgrid tied to an object data source see grid code below...

<tk:RadGrid ID="rgThreshold" runat="server" AllowPaging="True" Width="100%" PageSize="10" Skin="Black"
                    OnInsertCommand="rgThreshold_InsertCommand" OnDeleteCommand="rgThreshold_DeleteCommand" OnUpdateCommand="rgThreshold_UpdateCommand"
                    AutoGenerateColumns="False" AllowSorting="True" CellSpacing="0" OnNeedDataSource="rgThreshold_NeedDataSource" >
                    <PagerStyle Mode="NextPrevAndNumeric" />
                    <ValidationSettings EnableValidation="true" EnableModelValidation="true" CommandsToValidate="Insert,Edit" />
                    <MasterTableView CommandItemDisplay="Top" EditMode="EditForms" InsertItemDisplay="Top" AutoGenerateColumns="false" DataKeyNames="ThresholdID" EditFormSettings-EditColumn-ButtonType="ImageButton">
                        <CommandItemSettings AddNewRecordText="Add New Threshold" />
                        <Columns>
                            <tk:GridEditCommandColumn UniqueName="EditCommandColumn" ButtonType="ImageButton">
                                <ItemStyle CssClass="myImageButton" />
                            </tk:GridEditCommandColumn>
                            <tk:GridBoundColumn HeaderText="Threshold ID" DataField="ThresholdID" Display="false" UniqueName="ThresholdID" ReadOnly="true" />
                            <tk:GridTemplateColumn HeaderText="Threshold Number" DataField="ThresholdNumber" UniqueName="ThresholdNumber" SortExpression="ThresholdNumber" ColumnEditorID="ThresholdNumberEditor" HeaderStyle-Width="150px" >
                                <ItemTemplate>
                                    <%# Eval("ThresholdNumber") %>
                                </ItemTemplate>
                                <InsertItemTemplate>
                                    <tk:RadNumericTextBox ID="tbThresholdNumber" runat="server" Value="5" DbValue='<%# Bind("ThresholdNumber") %>' Width="50px" ShowSpinButtons="true" NumberFormat-DecimalDigits="0" />
                                    <asp:RequiredFieldValidator ID="rfvThresholdNumber" runat="server" ControlToValidate="tbThresholdNumber" Text="Threshold Number is Required." InitialValue="" Display="Dynamic" CssClass="Validator" />
                                </InsertItemTemplate>
                                <EditItemTemplate>
                                    <tk:RadNumericTextBox ID="tbThresholdNumber" runat="server" DbValue='<%# Bind("ThresholdNumber") %>' Width="50px" ShowSpinButtons="true" NumberFormat-DecimalDigits="0" />
                                    <asp:RequiredFieldValidator ID="rfvThresholdNumber" runat="server" ControlToValidate="tbThresholdNumber" Text="Threshold Number is Required." InitialValue="" Display="Dynamic" CssClass="Validator" />
                                </EditItemTemplate>
                            </tk:GridTemplateColumn>
                            <tk:GridTemplateColumn HeaderText="Threshold Name" DataField="ThresholdName" UniqueName="ThresholdName" ColumnEditorID="ThresholdNameEditor" HeaderStyle-Width="300px">
                                <ItemTemplate>
                                    <%# Eval("ThresholdName") %>
                                </ItemTemplate>
                                <InsertItemTemplate>
                                    <tk:RadTextBox ID="tbThresholdName" runat="server" Text='<%# Bind("ThresholdName") %>' Width="500px" MaxLength="100" />
                                    <asp:RequiredFieldValidator ID="rfvThresholdName" runat="server" ControlToValidate="tbThresholdName" Text="Threshold Name is Required." InitialValue="" Display="Dynamic" CssClass="Validator" />
                                </InsertItemTemplate>
                                <EditItemTemplate>
                                    <tk:RadTextBox ID="tbThresholdName" runat="server" Text='<%# Bind("ThresholdName") %>' Width="500px" MaxLength="100" />
                                    <asp:RequiredFieldValidator ID="rfvThresholdName" runat="server" ControlToValidate="tbThresholdName" Text="Threshold Name is Required." InitialValue="" Display="Dynamic" CssClass="Validator" />
                                </EditItemTemplate>
                            </tk:GridTemplateColumn>
                            <tk:GridTemplateColumn HeaderText="Emails" DataField="Emails" UniqueName="Emails" ColumnEditorID="EmailsEditor" HeaderStyle-Width="400px">
                                <ItemTemplate>
                                    <%# Eval("Emails") %>
                                </ItemTemplate>
                                <InsertItemTemplate>
                                    <tk:RadTextBox ID="tbEmails" runat="server" Text='<%# Bind("Emails") %>' TextMode="MultiLine" Width="500px" Height="100px" MaxLength="2000" />
                                    <asp:RequiredFieldValidator ID="rfvEmails" runat="server" ControlToValidate="tbEmails" Text="Emails are Required." InitialValue="" Display="Dynamic" CssClass="Validator" />
                                </InsertItemTemplate>
                                <EditItemTemplate>
                                    <tk:RadTextBox ID="tbEmails" runat="server" Text='<%# Bind("Emails") %>' TextMode="MultiLine" Width="500px" Height="100px" MaxLength="2000" />
                                    <asp:RequiredFieldValidator ID="rfvEmails" runat="server" ControlToValidate="tbEmails" Text="Emails are Required." InitialValue="" Display="Dynamic" CssClass="Validator" />
                                </EditItemTemplate>
                            </tk:GridTemplateColumn>
                            <tk:GridTemplateColumn HeaderText="CC Emails" DataField="AdminEmails" UniqueName="AdminEmails" ColumnEditorID="AdminEmailsEditor" HeaderStyle-Width="400px">
                                <ItemTemplate>
                                    <%# Eval("AdminEmails") %>
                                </ItemTemplate>
                                <InsertItemTemplate>
                                    <tk:RadTextBox ID="tbAdminEmails" runat="server" Text='<%# Bind("AdminEmails") %>' TextMode="MultiLine" Width="500px" Height="100px" MaxLength="2000" />
                                </InsertItemTemplate>
                                <EditItemTemplate>
                                    <tk:RadTextBox ID="tbAdminEmails" runat="server" Text='<%# Bind("AdminEmails") %>' TextMode="MultiLine" Width="500px" Height="100px" MaxLength="2000" />
                                </EditItemTemplate>
                            </tk:GridTemplateColumn>
                            <tk:GridButtonColumn ConfirmText="Delete this Threshold (All Assignments will also be deleted)?" ConfirmDialogType="RadWindow" ConfirmTitle="Delete Threshold" CommandArgument="ThresholdID" CommandName="Delete" ConfirmDialogHeight="100px" ConfirmDialogWidth="220px" ButtonType="ImageButton" />
                        </Columns>
                        <EditFormSettings ColumnNumber="2" CaptionDataField="ThresholdName" CaptionFormatString="Edit: {0}">
                            <FormCaptionStyle CssClass="EditFormHeader"></FormCaptionStyle>
                        </EditFormSettings>
                    </MasterTableView>
                </tk:RadGrid>
                <tk:RadWindowManager ID="RadWindowManager1" runat="server" Skin="Black" />
                <tk:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server" Skin="Black" />

The problem is it works great if at least one record exists but if I have a collection of object with count = 0 (no records) and I click the add new record button i get a:

Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: DataBinding: 'Telerik.Web.UI.GridInsertionObject' does not contain a property with the name 'ThresholdName'.

What am I doing wrong?

[Jayesh Goyani]

Hello Aleksander,

<InsertItemTemplate>
                                    <tk:RadTextBox ID="tbAdminEmails" runat="server" Text='<%# Bind("AdminEmails") %>' TextMode="MultiLine" Width="500px" Height="100px" MaxLength="2000" />
                                </InsertItemTemplate>

Please remove below code part.

Text='<%# Bind("AdminEmails") %>'

If you want to assign this value on insert mode then assign it using ItemDataBound event.

Let me know if any concern.

Thanks,
Jayesh Goyani

[Aleksander]

I have changed the code to...

<tk:RadGrid ID="rgThreshold" runat="server" AllowPaging="True" Width="100%" PageSize="10" Skin="Black"
                    OnInsertCommand="rgThreshold_InsertCommand" OnDeleteCommand="rgThreshold_DeleteCommand" OnUpdateCommand="rgThreshold_UpdateCommand"
                    AutoGenerateColumns="False" AllowSorting="True" CellSpacing="0" OnNeedDataSource="rgThreshold_NeedDataSource" >
                    <PagerStyle Mode="NextPrevAndNumeric" />
                    <ValidationSettings EnableValidation="true" EnableModelValidation="true" CommandsToValidate="Insert,Edit" />
                    <MasterTableView CommandItemDisplay="Top" EditMode="EditForms" InsertItemDisplay="Top" AutoGenerateColumns="false" DataKeyNames="ThresholdID" EditFormSettings-EditColumn-ButtonType="ImageButton">
                        <CommandItemSettings AddNewRecordText="Add New Threshold" />
                        <Columns>
                            <tk:GridEditCommandColumn UniqueName="EditCommandColumn" ButtonType="ImageButton">
                                <ItemStyle CssClass="myImageButton" />
                            </tk:GridEditCommandColumn>
                            <tk:GridBoundColumn HeaderText="Threshold ID" DataField="ThresholdID" Display="false" UniqueName="ThresholdID" ReadOnly="true" />
                            <tk:GridTemplateColumn HeaderText="Threshold Number" DataField="ThresholdNumber" UniqueName="ThresholdNumber" SortExpression="ThresholdNumber" ColumnEditorID="ThresholdNumberEditor" HeaderStyle-Width="150px" >
                                <ItemTemplate>
                                    <%# Eval("ThresholdNumber") %>
                                </ItemTemplate>
                                <InsertItemTemplate>
                                    <tk:RadNumericTextBox ID="tbThresholdNumber" runat="server" Value="5" Width="50px" ShowSpinButtons="true" NumberFormat-DecimalDigits="0" />
                                    <asp:RequiredFieldValidator ID="rfvThresholdNumber" runat="server" ControlToValidate="tbThresholdNumber" Text="Threshold Number is Required." InitialValue="" Display="Dynamic" CssClass="Validator" />
                                </InsertItemTemplate>
                                <EditItemTemplate>
                                    <tk:RadNumericTextBox ID="tbThresholdNumber" runat="server" DbValue='<%# Bind("ThresholdNumber") %>' Width="50px" ShowSpinButtons="true" NumberFormat-DecimalDigits="0" />
                                    <asp:RequiredFieldValidator ID="rfvThresholdNumber" runat="server" ControlToValidate="tbThresholdNumber" Text="Threshold Number is Required." InitialValue="" Display="Dynamic" CssClass="Validator" />
                                </EditItemTemplate>
                            </tk:GridTemplateColumn>
                            <tk:GridTemplateColumn HeaderText="Threshold Name" DataField="ThresholdName" UniqueName="ThresholdName" ColumnEditorID="ThresholdNameEditor" HeaderStyle-Width="300px">
                                <ItemTemplate>
                                    <%# Eval("ThresholdName") %>
                                </ItemTemplate>
                                <InsertItemTemplate>
                                    <tk:RadTextBox ID="tbThresholdName" runat="server" Text="" Width="500px" MaxLength="100" />
                                    <asp:RequiredFieldValidator ID="rfvThresholdName" runat="server" ControlToValidate="tbThresholdName" Text="Threshold Name is Required." InitialValue="" Display="Dynamic" CssClass="Validator" />
                                </InsertItemTemplate>
                                <EditItemTemplate>
                                    <tk:RadTextBox ID="tbThresholdName" runat="server" Text='<%# Bind("ThresholdName") %>' Width="500px" MaxLength="100" />
                                    <asp:RequiredFieldValidator ID="rfvThresholdName" runat="server" ControlToValidate="tbThresholdName" Text="Threshold Name is Required." InitialValue="" Display="Dynamic" CssClass="Validator" />
                                </EditItemTemplate>
                            </tk:GridTemplateColumn>
                            <tk:GridTemplateColumn HeaderText="Emails" DataField="Emails" UniqueName="Emails" ColumnEditorID="EmailsEditor" HeaderStyle-Width="400px">
                                <ItemTemplate>
                                    <%# Eval("Emails") %>
                                </ItemTemplate>
                                <InsertItemTemplate>
                                    <tk:RadTextBox ID="tbEmails" runat="server" Text="" TextMode="MultiLine" Width="500px" Height="100px" MaxLength="2000" />
                                    <asp:RequiredFieldValidator ID="rfvEmails" runat="server" ControlToValidate="tbEmails" Text="Emails are Required." InitialValue="" Display="Dynamic" CssClass="Validator" />
                                </InsertItemTemplate>
                                <EditItemTemplate>
                                    <tk:RadTextBox ID="tbEmails" runat="server" Text='<%# Bind("Emails") %>' TextMode="MultiLine" Width="500px" Height="100px" MaxLength="2000" />
                                    <asp:RequiredFieldValidator ID="rfvEmails" runat="server" ControlToValidate="tbEmails" Text="Emails are Required." InitialValue="" Display="Dynamic" CssClass="Validator" />
                                </EditItemTemplate>
                            </tk:GridTemplateColumn>
                            <tk:GridTemplateColumn HeaderText="CC Emails" DataField="AdminEmails" UniqueName="AdminEmails" ColumnEditorID="AdminEmailsEditor" HeaderStyle-Width="400px">
                                <ItemTemplate>
                                    <%# Eval("AdminEmails") %>
                                </ItemTemplate>
                                <InsertItemTemplate>
                                    <tk:RadTextBox ID="tbAdminEmails" runat="server" Text="" TextMode="MultiLine" Width="500px" Height="100px" MaxLength="2000" />
                                </InsertItemTemplate>
                                <EditItemTemplate>
                                    <tk:RadTextBox ID="tbAdminEmails" runat="server" Text='<%# Bind("AdminEmails") %>' TextMode="MultiLine" Width="500px" Height="100px" MaxLength="2000" />
                                </EditItemTemplate>
                            </tk:GridTemplateColumn>
                            <tk:GridButtonColumn ConfirmText="Delete this Threshold (All Assignments will also be deleted)?" ConfirmDialogType="RadWindow" ConfirmTitle="Delete Threshold" CommandArgument="ThresholdID" CommandName="Delete" ConfirmDialogHeight="100px" ConfirmDialogWidth="220px" ButtonType="ImageButton" />
                        </Columns>
                        <EditFormSettings ColumnNumber="2" CaptionDataField="ThresholdName" CaptionFormatString="Edit: {0}">
                            <FormCaptionStyle CssClass="EditFormHeader"></FormCaptionStyle>
                        </EditFormSettings>
                    </MasterTableView>
                </tk:RadGrid>
                <tk:RadWindowManager ID="RadWindowManager1" runat="server" Skin="Black" />
                <tk:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server" Skin="Black" />

and i still get Error: Sys.WebForms.PageRequestManagerServerErrorException: DataBinding: 'Telerik.Web.UI.GridInsertionObject' does not contain a property with the name 'ThresholdName'.

[Tsvetina]

Hello Aleksander,

You could try setting a default insert value for the column in question. Use the DefaultInsertValue property of the GridTemplateColumn or do this manually in ItemCommand (when the command name is InitInsert).
For more information you could check out this help article on know reasons for error messages in RadGrid;
http://www.telerik.com/help/aspnet-ajax/grid-error-messages.html

All the best,
Tsvetina
the Telerik team