c# - 传递参数时sqldatasource的问题

Question

部分sqldatasource参数:

            <asp:SqlDataSource ID="AllQuestionAskedDataSource" runat="server" 
                ConnectionString="<%$ ConnectionStrings:CP_AllQuestionsAnswered %>" SelectCommand="SELECT ThreadTitle
FROM Threads
WHERE UsersID=@UserID">
                <SelectParameters>
                    <asp:Parameter Name="UserID" />
                </SelectParameters>
            </asp:SqlDataSource>

背后的代码:

 Guid userid = UsefulStaticMethods.GetUserNameFromUserGuid(name);
 AllQuestionAskedDataSource.SelectParameters["UserID"].DefaultValue = userid;

它告诉我它无法将用户标识从 Guid 转换为字符串。但是参数必须是Guid，sqldatasource的select语句才能工作

Answer 1

<SelectParameters>
                <asp:Parameter Name="UserID" Type="Guid"  />
     </SelectParameters> 

更新代码

<asp:Parameter Name="UserID" Type="Object" />
<asp:Parameter Name="MemberID" DbType="Guid" />