Не могу разобраться из-за чего ошибка.. Помогите
автор<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ExigenProjectConnectionString %>"
SelectCommand="SELECT * FROM [Projects] ORDER BY [EndDate] DESC"></asp:SqlDataSource>

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ProjectId" DataSourceID="SqlDataSource1">
<Columns>
<asp:CommandField ShowSelectButton="True" />
<asp:BoundField DataField="StartDate" HeaderText="StartDate" SortExpression="StartDate" />
<asp:BoundField DataField="EndDate" HeaderText="EndDate" SortExpression="EndDate" />
<asp:BoundField DataField="Estimated revenue" HeaderText="Estimated revenue" SortExpression="Estimated revenue" />
</Columns>
</asp:GridView>
<br />
<asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False" DataKeyNames="ProjectId" DataSourceID="SqlDataSource2" Height="113px" Width="405px">
<Fields>
<asp:BoundField DataField="ProjectId" HeaderText="ProjectId" InsertVisible="False" ReadOnly="True" SortExpression="ProjectId" />
<asp:BoundField DataField="StartDate" HeaderText="StartDate" SortExpression="StartDate" />
<asp:BoundField DataField="EndDate" HeaderText="EndDate" SortExpression="EndDate" />
<asp:BoundField DataField="Estimated revenue" HeaderText="Estimated revenue" SortExpression="Estimated revenue" />
<asp:CommandField ShowDeleteButton="True" ShowEditButton="True" ShowInsertButton="True" />
</Fields>
</asp:DetailsView>
<br />

<asp:SqlDataSource ID="SqlDataSource2" runat="server"
ConnectionString="<%$ ConnectionStrings:ExigenProjectConnectionString %>"
DeleteCommand="DELETE FROM [Projects] WHERE [ProjectId] = @ProjectId"
InsertCommand="INSERT INTO [Projects] ([StartDate], [EndDate], [Estimated revenue]) VALUES (@StartDate, @EndDate, @Estimated_revenue)"
SelectCommand="SELECT * FROM [Projects] WHERE ([ProjectId] = @ProjectId)"
UpdateCommand="UPDATE [Projects] SET [StartDate] = @StartDate, [EndDate] = @EndDate, [Estimated revenue] = @Estimated_revenue WHERE [ProjectId] = @ProjectId">

<DeleteParameters>
<asp:Parameter Name="ProjectId" Type="Int32" />
</DeleteParameters>
<InsertParameters>
<asp:Parameter DbType="Date" Name="StartDate" />
<asp:Parameter DbType="Date" Name="EndDate" />
<asp:Parameter Name="Estimated_revenue" Type="Decimal" />
</InsertParameters>
<SelectParameters>
<asp:ControlParameter ControlID="GridView1" Name="ProjectId" PropertyName="SelectedValue" Type="Int32" />
</SelectParameters>
<UpdateParameters>
<asp:Parameter DbType="Date" Name="StartDate" />
<asp:Parameter DbType="Date" Name="EndDate" />
<asp:Parameter Name="Estimated_revenue" Type="Decimal" />
<asp:Parameter Name="ProjectId" Type="Int32" />
</UpdateParameters>
</asp:SqlDataSource>


Если есть возможность у кого нибудь можете дать Skype, задам пару простых вопросов и потом пополню Ваш мобильный счет))