C# 在文件系统中插入图像文件

我得到这个错误：

不允许从数据类型sql_variant隐式转换为uniqueidentifier。使用CONVERT函数运行此查询

矿山代码如下：

源代码：

<asp:ListView ID="ListView1" runat="server" DataKeyNames="UserId" DataSourceID="SqlDataSource1" InsertItemPosition="LastItem" >

       <InsertItemTemplate>

            <asp:TextBox ID="UserPicUrlTextBox" runat="server" Text='<%# Bind("UserPicUrl") %>' />
            <asp:FileUpload ID="FileUpload1" runat="server" />

            <asp:Button ID="InsertButton" runat="server" CommandName="Insert" Text="Insert" />
            <asp:Button ID="CancelButton" runat="server" CausesValidation="false" CommandName="Cancel" Text="Clear" />

        </InsertItemTemplate>
</asp:ListView>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Security;

public partial class userProfile : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void SqlDataSource1_Selecting(object sender, SqlDataSourceSelectingEventArgs e)
    {
        // Get a reference to the currently logged on user
        MembershipUser currentUser = Membership.GetUser();
        // Determine the currently logged on user's UserId value
        Guid currentUserId = (Guid)currentUser.ProviderUserKey;
        // Assign the currently logged on user's UserId to the @UserId parameter
        e.Command.Parameters["@UserId"].Value = currentUserId;
    }

    protected void SqlDataSource1_Inserting(object sender, SqlDataSourceCommandEventArgs e)
    {
        FileUpload FileUpload1 = (FileUpload)ListView1.InsertItem.FindControl("FileUpload1");
        string virtualFolder = "~/UserPics/";
        string physicalFolder = Server.MapPath(virtualFolder);
        string fileName = Guid.NewGuid().ToString();
        string extension = System.IO.Path.GetExtension(FileUpload1.FileName);
        FileUpload1.SaveAs(System.IO.Path.Combine(physicalFolder, fileName + extension));

        string UserPicUrl = virtualFolder + fileName + extension;
        e.Command.Parameters["@UserPicUrl"].Value = UserPicUrl;
    }
}

目标：我正在尝试将图像存储在文件夹中，并将相应的Url保存在数据库中

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非常有帮助。谢谢。

SqlDataSource1\u插入

将set UserId值添加为插入参数

e.Command.Parameters["@UserId"].Value =(Guid)Membership.GetUser().ProviderUserKey;

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您的表中是否有uniqueidentifier列？您在

InsertParameters

中给出的类型是什么？应该是

DbType=“Guid”

@Damith，谢谢您的回答，先生，我表中的uniqueidentifier是UserId，我给的类型是object。您能用设置UserId和type参数值的代码更新问题吗？@Damith；就这么做了。请看一看。

e.Command.Parameters["@UserId"].Value =(Guid)Membership.GetUser().ProviderUserKey;