如何使用存儲過程更新網格視圖中的數據？

Question

我嘗試使用命令行來更新網格視圖數據，但我得到的錯誤等：

過程或函數「UpdateState」預計參數「@StateName」，但未提供。

存儲過程：

CREATE PROCEDURE UpdateState 
    @StateName varchar(30) 
AS 
    update tblState 
    set StateName = @StateName 

Aspx頁：

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) 
{ 
     GridView1.EditIndex = e.NewEditIndex; 
     FillStates(); 
} 

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) 
{ 
     int Sid = Convert.ToInt16(GridView1.DataKeys[e.RowIndex].Value); 
     TextBox StateName = (TextBox)GridView1.Rows[e.RowIndex].FindControl("TextBox1"); 
     p.Sid = Sid; 
     p.StateName = StateName.Text; 
     p.UpdateState(p); 
     GridView1.EditIndex = -1; 
     FillStates(); 
} 

來源：

public void UpdateState(Property p) 
{ 
     cmd = new SqlCommand("UpdateState", con); 
     cmd.Parameters.AddWithValue("@Sid", p.Sid); 
     cmd.Parameters.AddWithValue("@StateName", p.StateName); 
     con.Open(); 
     cmd.ExecuteNonQuery(); 
     con.Close(); 
} 

Answer 1

添加命令類型

cmd = new SqlCommand("UpdateState", con); 
    cmd.CommandType = CommandType.StoredProcedure; 
    cmd.Parameters.AddWithValue("@Sid", p.Sid); 
    cmd.Parameters.AddWithValue("@StateName", p.StateName); 
    con.Open(); 
    cmd.ExecuteNonQuery(); 
    con.Close();