程序写完后编译没有问题，填好数据提交就抱错
异常详细信息: System.Exception: 将截断字符串或二进制数据。

下面是这个程序
private void ImageButton1_Click(object sender, System.Web.UI.ImageClickEventArgs e)
        {
            //con.open();
            
            string sqlstr="";
            string uname=this.uname.Value;
            string upwd=this.upwd.Value;
            string upass=this.upass.Value;
            upass=FormsAuthentication.HashPasswordForStoringInConfigFile(upass,"md5");
            string email=this.email.Value;

            if(this.uname.Value=="" || this.upwd.Value=="" || this.upass.Value=="" || this.email.Value=="")
            {
                this.Response.Write("<script>alert('请输入正确的信息！');</script>");
            }
            else
            {
                sqlstr="insert into G_Users (UserName,PassWord,Pass,email) values('"+uname.ToString()+"','"+upwd.ToString()+"','"+upass.ToString()+"','"+email.ToString()+"')";
                DataSet ds=DataLibrary.dataSet(sqlstr);
            
               if(ds.Tables[0].Rows.Count>0)
               {
                this.Response.Write("<script>alert('添加成功！');window.location.href='usersshow.aspx';</script>");
                
               }
               else
               {
                this.Response.Write("<script>alert('添加失败！');window.location.href='usersadd.aspx';</script>");

               }
            }