c# - C#中的存储过程

Question

我在C＃中遇到存储过程问题，出现此错误：


  过程或函数myQSProcedure_Delete有太多参数
  指定。


我无法解决此问题。请帮助我。

代码如下。

ALTER PROCEDURE [dbo].[myQSProcedure_Delete] 
@Id int
AS
BEGIN
Delete From tblfb where Id = @Id
End

我的C＃代码是：

DataTable dt = (DataTable)ViewState["dt"];
DataTable dtDelete = (DataTable)ViewState["dtDelete"];
dtDelete.Rows.Add(dt.Rows[e.RowIndex]["Id"].ToString(),
dt.Rows[e.RowIndex]["name"].ToString(), dt.Rows[e.RowIndex]["session"].ToString(),
dt.Rows[e.RowIndex]["gender"].ToString(), dt.Rows[e.RowIndex]["email"].ToString(),
dt.Rows[e.RowIndex]["address"].ToString(), dt.Rows[e.RowIndex]["priority"].ToString(),       
dt.Rows[e.RowIndex]["comments"].ToString());
ViewState["dtDelete"] = dtDelete;
dt.Rows[e.RowIndex].Delete();
dt.AcceptChanges();
if (dt.Rows.Count < 1)
dt.Rows.Add(null, "", "", "", "", "", "", "");
GridView1.DataSource = dt;
GridView1.DataBind();
ViewState["dt"] = dt;
if (dt.Rows[0][0].ToString().Equals(""))
    {
        GridView1.Rows[0].Visible = false;
    }
SqlConnection conn = new SqlConnection("data source=Burhan\\SQLEXPRESS;database=mydb;integrated security=true");
    conn.Open();
    SqlCommand cmd = new SqlCommand("myQSProcedure_Delete", conn);
    cmd.CommandType = CommandType.StoredProcedure;
  foreach (DataRow row in dtDelete.Rows)
    {
        cmd.Parameters.Add(new SqlParameter("@Id",row[0]));
        cmd.ExecuteNonQuery();
    }
   conn.Close();
   GridView1.DataSource = dt;
    GridView1.DataBind();
    ViewState["dt"] = dt;

Answer 1

您还可以添加一次参数，并为其分配值n次，如下所示：

  using (var cmd = new SqlCommand("myQSProcedure_Delete", conn))
  {
      cmd.CommandType = CommandType.StoredProcedure;
      cmd.Parameters.Add("@Id",SqlDbType.Int);
      foreach (DataRow row in dtDelete.Rows)
      {
          cmd.Parameters["@Id"].Value = row[0];
          cmd.ExecuteNonQuery();
      }
  }