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6.6

Receiving InvalidCast Exception on aspCheckbox when when attempting to add a record

Asked by rlcrews in Programming for ASP.NET, SQL Server 2005, Microsoft Visual C#.Net

Tags: ASP.NET, IE 7, Specified Cast is not Valid in Insert record form

I am trying to manage and insert records in a telerik datagrid using a custom forms template. Within the template I have bound Checkboxes to my SQL 2005 database. The fields in the database are bit fields
Updates, and deletes work fine. However when I click on the add record button I receive an Invalid Cast Exception.  I am binding the checked state of the checkbox to the bit field in my database and I have the bit field set to allow null values. Can anyone help point me in the right direction as to what I am doing wrong?
Attached is the aspx file code 
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<asp:SqlDataSource ID="SqlDataSource1" runat="server" 
        ConnectionString="<%$ ConnectionStrings:XXXXXX%>" 
        DeleteCommand="DELETE FROM [vaPressRelease] WHERE [PressID] = @PressID" 
        InsertCommand="INSERT INTO [vaPressRelease] ([PressTitle], [PressSumm], [PressDateRel], [PressText], [PressVisible], [PressIsCurrent]) VALUES (@PressTitle, @PressSumm, @PressDateRel, @PressText, @PressVisible, @PressIsCurrent)" 
        SelectCommand="SELECT * FROM [vaPressRelease] ORDER BY [PressDateRel] DESC, [PressIsCurrent] DESC" 
        UpdateCommand="UPDATE [vaPressRelease] SET [PressTitle] = @PressTitle, [PressSumm] = @PressSumm, [PressDateRel] = @PressDateRel, [PressText] = @PressText, [PressVisible] = @PressVisible, [PressIsCurrent] = @PressIsCurrent WHERE [PressID] = @PressID">
        <DeleteParameters>
            <asp:Parameter Name="PressID" Type="Int32" />
        </DeleteParameters>
        <UpdateParameters>
            <asp:Parameter Name="PressTitle" Type="String" />
            <asp:Parameter Name="PressSumm" Type="String" />
            <asp:Parameter Name="PressDateRel" Type="DateTime" />
            <asp:Parameter Name="PressText" Type="String" />
            <asp:Parameter Name="PressVisible" Type="Boolean" />
            <asp:Parameter Name="PressIsCurrent" Type="Boolean" />
            <asp:Parameter Name="PressID" Type="Int32" />
        </UpdateParameters>
        <InsertParameters>
            <asp:Parameter Name="PressTitle" Type="String" />
            <asp:Parameter Name="PressSumm" Type="String" />
            <asp:Parameter Name="PressDateRel" Type="DateTime" />
            <asp:Parameter Name="PressText" Type="String" />
            <asp:Parameter Name="PressVisible" Type="Boolean" />
            <asp:Parameter Name="PressIsCurrent" Type="Boolean" />
        </InsertParameters>
    </asp:SqlDataSource>
    <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
        <AjaxSettings>
            <telerik:AjaxSetting AjaxControlID="RadGrid1">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="RadGrid1" />
                </UpdatedControls>
            </telerik:AjaxSetting>
        </AjaxSettings>
    </telerik:RadAjaxManager>
<br />
<p>
Use the following form to manage or delete a Press Release. To update a release simply click on the press release row you wish to change. To add a press release click on the Add new record located at the top of the grid. To delete a press release click on the Delete link to the far right of the row.<br /><b>BE AWARE YOU WILL NOT BE PROMPTED TO CONFIRM YOUR DELETIONS.</b>
</p>
    <p>
        &nbsp;</p>
 
    <telerik:RadGrid ID="RadGrid1" runat="server" AllowAutomaticDeletes="True" 
        DataSourceID="SqlDataSource1" GridLines="None" 
        AllowAutomaticInserts="True" AllowAutomaticUpdates="True" 
        ShowStatusBar="True" Skin="Gray">
<HeaderContextMenu EnableTheming="True">
<CollapseAnimation Type="OutQuint" Duration="200"></CollapseAnimation>
</HeaderContextMenu>
 
<MasterTableView allowpaging="True" autogeneratecolumns="False" datakeynames="PressID" 
            datasourceid="SqlDataSource1" CommandItemDisplay="Top" ShowFooter="True">
<RowIndicatorColumn>
<HeaderStyle Width="20px"></HeaderStyle>
</RowIndicatorColumn>
 
<ExpandCollapseColumn>
<HeaderStyle Width="20px"></HeaderStyle>
</ExpandCollapseColumn>
    <Columns>
        <telerik:GridEditCommandColumn>
        </telerik:GridEditCommandColumn>
        <telerik:GridBoundColumn DataField="PressID" DataType="System.Int32" 
            HeaderText="ID" ReadOnly="True" SortExpression="PressID" 
            UniqueName="PressID" Visible="False">
        </telerik:GridBoundColumn>
        <telerik:GridBoundColumn DataField="PressTitle" HeaderText="Title" 
            SortExpression="PressTitle" UniqueName="PressTitle">
        </telerik:GridBoundColumn>
        <telerik:GridBoundColumn DataField="PressSumm" HeaderText="Summary" 
            SortExpression="PressSumm" UniqueName="PressSumm">
        </telerik:GridBoundColumn>
        <telerik:GridBoundColumn DataField="PressDateRel" DataType="System.DateTime" 
            HeaderText="Date Released" SortExpression="PressDateRel" 
            UniqueName="PressDateRel" DataFormatString="{0:MM/dd/yyyy}">
        </telerik:GridBoundColumn>
        <telerik:GridBoundColumn DataField="PressText" HeaderText="Body" 
            SortExpression="PressText" UniqueName="PressText">
        </telerik:GridBoundColumn>
        <telerik:GridCheckBoxColumn DataField="PressVisible" DataType="System.Boolean" 
            HeaderText="Is Visible" SortExpression="PressVisible" UniqueName="PressVisible">
        </telerik:GridCheckBoxColumn>
        <telerik:GridCheckBoxColumn DataField="PressIsCurrent" 
            DataType="System.Boolean" HeaderText="Is Current " 
            SortExpression="PressIsCurrent" UniqueName="PressIsCurrent">
        </telerik:GridCheckBoxColumn>
        <telerik:GridButtonColumn CommandName="Delete" Text="Delete" 
            UniqueName="column">
        </telerik:GridButtonColumn>
    </Columns>
    <EditFormSettings EditFormType="Template">
        <EditColumn UniqueName="EditCommandColumn1">
        </EditColumn>
        <FormTemplate>
            <table style="width:100%;">
                <tr>
                    <td width="120px" valign="top">
                        Press Release Title:</td>
                    <td >
                        <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("PressTitle") %>' 
                            Width="351px"></asp:TextBox>
                    </td>
                    <td>
                        <asp:CheckBox ID="CheckBox1" runat="server" 
                            Checked='<%# Bind("PressIsCurrent") %>' Text="Current" />
                    </td>
                    <td >
                        &nbsp;</td>
                </tr>
                <tr>
                    <td width="120px" valign="top">
                        Release Date:</td>
                    <td >
                        <asp:TextBox ID="TextBox2" runat="server" 
                            Text='<%# Bind("PressDateRel", "{0:MM/dd/yyyy}") %>' Width="177px"></asp:TextBox>
                    </td>
                    <td >
                        <asp:CheckBox ID="CheckBox2" runat="server" 
                            Checked='<%# Bind("PressVisible") %>' Text="Visible" />
                    </td>
                    <td>
                        &nbsp;</td>
                </tr>
                <tr>
                    <td width="120px" valign="top">
                        Summary:</td>
                    <td >
                        <asp:TextBox ID="TextBox3" runat="server" Rows="5" 
                            Text='<%# Bind("PressSumm") %>' TextMode="MultiLine" Width="476px"></asp:TextBox>
                    </td>
                    <td >
                        &nbsp;</td>
                </tr>
                <tr>
                    <td width="120px" valign="top">
                        Press Release Body<br />
                        Text</td>
                    <td width="660px" colspan="2">
                        <telerik:RadEditor ID="RadEditor1" Runat="server" 
                            Content='<%# Bind("PressText") %>' Width="650px" Skin="Gray" 
                            BackColor="White">
                            <Tools>
                                <telerik:EditorToolGroup>
                                    <telerik:EditorTool Name="Bold" />
                                    <telerik:EditorTool Name="Italic" />
                                    <telerik:EditorTool Name="Underline" />
                                    <telerik:EditorTool Name="JustifyLeft" />
                                    <telerik:EditorTool Name="JustifyCenter" />
                                    <telerik:EditorTool Name="JustifyRight" />
                                    <telerik:EditorTool Name="JustifyFull" />
                                    <telerik:EditorTool Name="LinkManager" />
                                    <telerik:EditorTool Name="Undo" />
                                    <telerik:EditorTool Name="Redo" />
                                </telerik:EditorToolGroup>
                                <telerik:EditorToolGroup>
                                    <telerik:EditorTool Name="FontName" />
                                    <telerik:EditorTool Name="FontSize" />
                                    <telerik:EditorTool Name="ForeColor" />
                                </telerik:EditorToolGroup>
                                <telerik:EditorToolGroup>
                                    <telerik:EditorTool Name="Copy" />
                                    <telerik:EditorTool Name="Paste" />
                                    <telerik:EditorTool Name="PasteAsHtml" />
                                    <telerik:EditorTool Name="PasteFromWord" />
                                    <telerik:EditorTool Name="PastePlainText" />
                                </telerik:EditorToolGroup>
                            </Tools>
                            <Content>
</Content>
                        </telerik:RadEditor>
                    </td>
                </tr>
                <tr>
                <td>
                <asp:Button ID="btnUpdate" Text='<%# (Container as GridItem).OwnerTableView.IsItemInserted ? "Insert" : "Update" %>' runat="server" CommandName='<%# (Container as GridItem).OwnerTableView.IsItemInserted ? "PerformInsert" : "Update" %>' />
                &nbsp;
                <asp:Button ID="btnCancel" Text="Cancel" runat="server" CausesValidation="false" CommandName="Cancel" />
                </td>
                <td></td>
                </tr>
            </table>
        </FormTemplate>
    </EditFormSettings>
    <PagerStyle Mode="NextPrevAndNumeric" Position="Top" />
</MasterTableView>
 
<FilterMenu EnableTheming="True">
<CollapseAnimation Type="OutQuint" Duration="200"></CollapseAnimation>
</FilterMenu>
    </telerik:RadGrid>
[+][-]12/18/08 05:37 AM, ID: 23203123Accepted Solution

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About this solution

Zones: Programming for ASP.NET, SQL Server 2005, Microsoft Visual C#.Net
Tags: ASP.NET, IE 7, Specified Cast is not Valid in Insert record form
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Solution Provided By: rlcrews
Participating Experts: 0
Solution Grade: A
 
[+][-]12/04/08 06:28 AM, ID: 23095537Author Comment

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