EditItemTemplate Error

A

Aaron Prohaska

Can anyone tell me why the following code is throwing this error:

System.InvalidCastException: Specified cast is not valid

Line 43: string itemID = e.Item.Cells[2].Text;
Line 44: string manufacturer =
((TextBox)e.Item.Cells[3].Controls[0]).Text;
Line 45: string model = ((TextBox)e.Item.Cells[4].Controls[0]).Text;
Line 46: string shortBlurb =
((TextBox)e.Item.Cells[5].Controls[0]).Text;

aspx code

<asp:DataGrid
AutoGenerateColumns="False"
BorderStyle="Solid"
CellPadding="2"
CellSpacing="0"
Width="100%"
DataKeyField="SpecialID"
OnEditCommand="EditItemClick"
OnUpdateCommand="UpdateItemClick"
OnDeleteCommand="DeleteItemClick"
OnCancelCommand="CancelItemClick"
ID="viewSpecials"
Runat="server">
<HeaderStyle BackColor="#ffffff" Font-Bold="True"/>
<ItemStyle BackColor="#ffffff"/>
<AlternatingItemStyle BackColor="WhiteSmoke"/>
<Columns>
<asp:EditCommandColumn EditText="Edit" UpdateText="Save"
CancelText="Cancel"/>
<asp:ButtonColumn Text="Delete" CommandName="Delete"/>
<asp:BoundColumn DataField="SpecialID" ReadOnly="True"
Visible="False"/>
<asp:TemplateColumn HeaderText="Manufacturer">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "Manufacturer") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="enterManufacturer" Text='<%#
DataBinder.Eval(Container.DataItem, "Manufacturer") %>' Width="100"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Model">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "Model") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox1" Text='<%#
DataBinder.Eval(Container.DataItem, "Model") %>' Width="100"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Blurb">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "ShortBlurb") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox8" Text='<%#
DataBinder.Eval(Container.DataItem, "ShortBlurb") %>' Width="200"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Color">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "Color") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox2" Text='<%#
DataBinder.Eval(Container.DataItem, "Color") %>' Width="100"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Image File">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "Image") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox3" Text='<%#
DataBinder.Eval(Container.DataItem, "Image") %>' Width="100"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Part Type">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "PartType") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox4" Text='<%#
DataBinder.Eval(Container.DataItem, "PartType") %>' Width="60"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Grams">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "Grams") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox5" Text='<%#
DataBinder.Eval(Container.DataItem, "Grams") %>' Width="50"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="MSRP">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "MSRP") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox6" Text='<%#
DataBinder.Eval(Container.DataItem, "MSRP") %>' Width="80"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Discount">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "Discount") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox7" Text='<%#
DataBinder.Eval(Container.DataItem, "Discount") %>' Width="50"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="SalePrice" HeaderText="Sale Price"
ReadOnly="True"/>
<asp:BoundColumn DataField="Savings" HeaderText="Savings"
ReadOnly="True"/>
</Columns>
</asp:DataGrid>

Codebeind C#:

string itemID = e.Item.Cells[2].Text;
string manufacturer = ((TextBox)e.Item.Cells[3].Controls[0]).Text;
string model = ((TextBox)e.Item.Cells[4].Controls[0]).Text;
string shortBlurb = ((TextBox)e.Item.Cells[5].Controls[0]).Text;
string color = ((TextBox)e.Item.Cells[6].Controls[0]).Text;
string image = ((TextBox)e.Item.Cells[7].Controls[0]).Text;
string partType = ((TextBox)e.Item.Cells[8].Controls[0]).Text;
string grams = ((TextBox)e.Item.Cells[9].Controls[0]).Text;
string msrp = ((TextBox)e.Item.Cells[10].Controls[0]).Text;
string discount = ((TextBox)e.Item.Cells[11].Controls[0]).Text;

regards,

Aaron
 
A

Aaron Prohaska

I seem to have found my answer. I'm now using the following to fix it.

string manufacturer = ((TextBox)e.Item.FindControl("controlName")).Text;

thanks anyways,

Aaron

Aaron said:
Can anyone tell me why the following code is throwing this error:

System.InvalidCastException: Specified cast is not valid

Line 43: string itemID = e.Item.Cells[2].Text;
Line 44: string manufacturer =
((TextBox)e.Item.Cells[3].Controls[0]).Text;
Line 45: string model = ((TextBox)e.Item.Cells[4].Controls[0]).Text;
Line 46: string shortBlurb =
((TextBox)e.Item.Cells[5].Controls[0]).Text;

aspx code

<asp:DataGrid
AutoGenerateColumns="False"
BorderStyle="Solid"
CellPadding="2"
CellSpacing="0"
Width="100%"
DataKeyField="SpecialID"
OnEditCommand="EditItemClick"
OnUpdateCommand="UpdateItemClick"
OnDeleteCommand="DeleteItemClick"
OnCancelCommand="CancelItemClick"
ID="viewSpecials"
Runat="server">
<HeaderStyle BackColor="#ffffff" Font-Bold="True"/>
<ItemStyle BackColor="#ffffff"/>
<AlternatingItemStyle BackColor="WhiteSmoke"/>
<Columns>
<asp:EditCommandColumn EditText="Edit" UpdateText="Save"
CancelText="Cancel"/>
<asp:ButtonColumn Text="Delete" CommandName="Delete"/>
<asp:BoundColumn DataField="SpecialID" ReadOnly="True"
Visible="False"/>
<asp:TemplateColumn HeaderText="Manufacturer">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "Manufacturer") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="enterManufacturer" Text='<%#
DataBinder.Eval(Container.DataItem, "Manufacturer") %>' Width="100"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Model">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "Model") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox1" Text='<%#
DataBinder.Eval(Container.DataItem, "Model") %>' Width="100"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Blurb">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "ShortBlurb") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox8" Text='<%#
DataBinder.Eval(Container.DataItem, "ShortBlurb") %>' Width="200"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Color">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "Color") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox2" Text='<%#
DataBinder.Eval(Container.DataItem, "Color") %>' Width="100"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Image File">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "Image") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox3" Text='<%#
DataBinder.Eval(Container.DataItem, "Image") %>' Width="100"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Part Type">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "PartType") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox4" Text='<%#
DataBinder.Eval(Container.DataItem, "PartType") %>' Width="60"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Grams">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "Grams") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox5" Text='<%#
DataBinder.Eval(Container.DataItem, "Grams") %>' Width="50"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="MSRP">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "MSRP") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox6" Text='<%#
DataBinder.Eval(Container.DataItem, "MSRP") %>' Width="80"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Discount">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "Discount") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Textbox7" Text='<%#
DataBinder.Eval(Container.DataItem, "Discount") %>' Width="50"
Runat="server"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="SalePrice" HeaderText="Sale Price"
ReadOnly="True"/>
<asp:BoundColumn DataField="Savings" HeaderText="Savings"
ReadOnly="True"/>
</Columns>
</asp:DataGrid>

Codebeind C#:

string itemID = e.Item.Cells[2].Text;
string manufacturer = ((TextBox)e.Item.Cells[3].Controls[0]).Text;
string model = ((TextBox)e.Item.Cells[4].Controls[0]).Text;
string shortBlurb = ((TextBox)e.Item.Cells[5].Controls[0]).Text;
string color = ((TextBox)e.Item.Cells[6].Controls[0]).Text;
string image = ((TextBox)e.Item.Cells[7].Controls[0]).Text;
string partType = ((TextBox)e.Item.Cells[8].Controls[0]).Text;
string grams = ((TextBox)e.Item.Cells[9].Controls[0]).Text;
string msrp = ((TextBox)e.Item.Cells[10].Controls[0]).Text;
string discount = ((TextBox)e.Item.Cells[11].Controls[0]).Text;

regards,

Aaron
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