使用存储过程更新C＃中的列

Question

I am trying to update columns in my table by filling out text boxes and clicking save; I don't get an error or anything. Just nothing happens!

Here is my stored procedure:

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

and it works when I run it in SQL Server Management Studio, given an ID and Title name

Here is my C# code

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

You're setting everything up (almost) correctly - but you're never actually executing the stored procedure!

Try this code:

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

There are some errors in the Button_Save_Click event handler:

1. When you use commandType is StoredProcedure you have to pass just the stored procedure name

2. With having a stored procedure with sp_ prefix create performance issue ( Using sp_ as prefix for user stored procedures in SQL server causing performance impact )

3. You forgot to call the ExecuteNonQuery method

Try this code:

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

Your query line should just be:

string query = "sp_UpdateProj";

You already have the parameters as objects below that.

Then add

cmd.ExecuteNonQuery();

to execute

Answer 4

Here is the brief info bout executing stored procedure using C#

Call a stored procedure with parameter in c#