Size属性的大小无效

这是我的SP：

CREATE PROCEDURE _insertAdminProfile ( @Ad_Fname VARCHAR(25), @Ad_Lname VARCHAR(25), @Ad_DOB DATE, @Ad_Sex VARCHAR(25), @Ad_Address VARCHAR(200), @Ad_Phone VARCHAR(12), @Ad_Email VARCHAR(25), @Ad_Pwd VARCHAR(7) OUTPUT ) AS BEGIN DECLARE @MyTableVar TABLE (Ad_Pwd VARCHAR(7)); INSERT INTO dbo.Admin_Profile (Ad_Fname, Ad_Lname, Ad_DOB, Ad_Sex,Ad_Address,Ad_Phone,Ad_Email) OUTPUT INSERTED.Ad_Regid INTO @MyTableVar VALUES (@Ad_Fname, @Ad_Lname, @Ad_DOB, @Ad_Sex, @Ad_Address, @Ad_Phone, @Ad_Email) SELECT @Ad_Pwd = Ad_Pwd FROM @MyTableVar END 

这是我的代码：

 protected void cmdprofile_Click(object sender, EventArgs e) { string _gender; if (rdomale.Checked) { _gender = "Male"; } else { _gender = "Female"; } Class1.con = CreateConnection(); cmd = new SqlCommand("_insertAdminProfile", Class1.con ); cmd.CommandType = System.Data.CommandType.StoredProcedure; cmd.Parameters.AddWithValue("@Ad_Fname", txtfname.Text); cmd.Parameters.AddWithValue("@Ad_Lname", txtlname.Text); cmd.Parameters.AddWithValue("@Ad_DOB", txtdob.Text); cmd.Parameters.AddWithValue("@Ad_Sex", _gender); cmd.Parameters.AddWithValue("@Ad_Address", txtaddress.Text); cmd.Parameters.AddWithValue("@Ad_Phone", txtphone.Text); cmd.Parameters.AddWithValue("@Ad_email", txtemail.Text); SqlParameter _outputparam = new SqlParameter(); _outputparam.ParameterName = "@Ad_Regid"; _outputparam.SqlDbType = System.Data.SqlDbType.VarChar; _outputparam.Direction = System.Data.ParameterDirection.Output; cmd.Parameters.Add(_outputparam); cmd.ExecuteNonQuery(); **// Here shows my error:: String[7]: the Size property has an invalid size of 0.** string _ID = _outputparam.Value.ToString(); ClientScript.RegisterStartupScript(this.GetType(), "message", "alert('New Values Inserted and Your temporary password is: " + _ID + "');", true); MultiView1.SetActiveView(Login_stat); } 

Answer 1

设置参数大小如：

  _outputparam.Size = 7; 

Answer 2

看起来您可能需要将_outputparam上的大小设置为7以匹配存储过程。