Question

我试图通过填写文本框并单击保存来更新表中的列；我没有收到任何错误。没事！

这是我的存储过程：

ALTER PROCEDURE [dbo].[sp_UpdateProj]
    @ORAID INT = NULL,
    @FullTitle NVARCHAR(250) = NULL
AS
BEGIN
    UPDATE tbl_ProjectFile
    SET FullTitle = @FullTitle
    WHERE ORAID = @ORAID
END

，当我在SQL Server Management Studio中运行它时，只要指定ID和标题名称，它就可以工作

这是我的C＃代码

protected void Button_Save_Click(object sender, EventArgs e)
{
    string connectionStr = ConfigurationManager.ConnectionStrings["ORAProjectConnectionString"].ConnectionString;
    using (SqlConnection con = new SqlConnection(connectionStr))
    {
        con.Open();

        string query = "sp_UpdateProj Where ORAID=" + int.Parse(TextBox_ORAID.Text);

        SqlCommand cmd = new SqlCommand(query, con);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Connection = con;

        cmd.Parameters.AddWithValue("@ORAID", Convert.ToInt32(TextBox_ORAID.Text));
        cmd.Parameters.AddWithValue("@FullTitle", TextBox_FullTitle.Text);

        con.Close();
    }
}

Answer 1

您（几乎）正确地设置了所有内容-但您从未实际执行存储过程！

尝试以下代码：

protected void Button_Save_Click(object sender, EventArgs e)
{
    string connectionStr = ConfigurationManager.ConnectionStrings["ORAProjectConnectionString"].ConnectionString;
    // the query string should be **ONLY** the stored procedure name - nothing else!
    string query = "dbo.sp_UpdateProj";

    // you should put **both** SqlConnection and SqlCommand in "using" blocks
    using (SqlConnection con = new SqlConnection(connectionStr))
    using (SqlCommand cmd = new SqlCommand(query, con))
    {
        cmd.CommandType = CommandType.StoredProcedure;

        // fill the parameters - avoiding "AddWithValue"
        cmd.Parameters.Add("@ORAID", SqlDbType.Int).Value = Convert.ToInt32(TextBox_ORAID.Text);
        cmd.Parameters.Add("@FullTitle", SqlDbType.NVarChar, 250).Value = TextBox_FullTitle.Text;

        con.Open();
        // you need to **EXECUTE** the command !
        cmd.ExecuteNonQuery();
        con.Close();
    }
}

Answer 2

Button_Save_Click事件处理程序中存在一些错误：

当您使用commandType为StoredProcedure时，您只需传递存储过程名称
使用具有sp_前缀的存储过程会导致性能问题（Using sp_ as prefix for user stored procedures in SQL server causing performance impact）
您忘记调用ExecuteNonQuery方法

尝试以下代码：

protected void Button_Save_Click(object sender, EventArgs e)
{
 string connectionStr = ConfigurationManager.ConnectionStrings["ORAProjectConnectionString"].ConnectionString;
 string procedureName = "dbo.UpdateProj";


 using (SqlConnection con = new SqlConnection(connectionStr))
 using(SqlCommand cmd = new SqlCommand(procedureName , con))
 {

    cmd.CommandType = CommandType.StoredProcedure;

    cmd.Parameters.AddWithValue("@ORAID", Convert.ToInt32(TextBox_ORAID.Text));
    cmd.Parameters.AddWithValue("@FullTitle", TextBox_FullTitle.Text);
    con.Open();
    cmd.ExecuteNonQuery()
    con.Close();
 }
}

Answer 3

您的查询行应为：

string query = "sp_UpdateProj";

您已经将参数作为其下方的对象。

然后添加

cmd.ExecuteNonQuery();

执行

Answer 4

这是使用C＃执行存储过程的简短信息

Call a stored procedure with parameter in c#

使用存储过程更新C＃

4 个答案: