Question

数据库没有更新，它只是重定向而不是崩溃这是代码：

    protected void cmdUpdate_Click(object sender, EventArgs e)
    {

        MySqlConnection conn = new MySqlConnection("server=localhost;uid=root;" + "pwd=password;database=ddt_data");
        conn.Open();

        string command = String.Format("update `fixture` set `referee`='" + this.txtRef.Text + "',`ScoreA`='" + this.txtScoreA.Text + "',`ScoreB`='" + this.txtScoreB.Text + "',`Winner`='" + this.txtWinner.Text + "' where `idfixture`='" + this.txtFixtureID.Text + "';", conn);
        //MySqlDataReader Reader;
        MySqlCommand Update = new MySqlCommand(command, conn);
        Update.Connection = conn;


        //Update.Parameters.AddWithValue("@Date", txtDate.Text);
        //Update.Parameters.AddWithValue("@Time", txtTime.Text);
        //Update.Parameters.AddWithValue("@Team A", txtTeamA.Text);
        //Update.Parameters.AddWithValue("@Team B", txtTeamB.Text);
        //Update.Parameters.AddWithValue("@Referee", txtRef.Text);
        //Update.Parameters.AddWithValue("@ScoreA", txtScoreA.Text);
        //Update.Parameters.AddWithValue("@ScoreB", txtScoreB.Text);
        //Update.Parameters.AddWithValue("@Winner", txtWinner.Text);
        //Reader = Update.ExecuteReader();
        //while (Reader.Read()) 

        //{
        //}

        Update.ExecuteNonQuery();

        conn.Close();
        Response.Redirect("FixtureEdit.aspx");

    }

Answer 1

我修复了CommandText值并使用了参数化的SQL语句。确保参数名称与下面的列表匹配。

protected void cmdUpdate_Click(object sender, EventArgs e)
{
    MySqlConnection conn = new MySqlConnection("server=localhost;uid=root;" + 
        "pwd=password;database=ddt_data");
    conn.Open();
    string command = "UPDATE fixture SET referee=@referee, scorea=@scorea, " +
        "scoreb=@scoreb, winner=@winner WHERE idfixture=@idfixture";
    MySqlCommmand update = new MySqlCommand(command, conn);
    update.Parameters.AddWithValue("@referee", this.txtRef.Text);
    update.Parameters.AddWithValue("@scorea", this.txtScoreA.Text);
    update.Parameters.AddWithValue("@scoreb", this.txtScoreB.Text);
    update.Parameters.AddWithValue("@winner", this.txtWinner.Text);
    update.Parameters.AddWithValue("idfixture", this.txtFixtureID.Text);

    // not sure what you want to achieve from this
    // MySqlDataReader reader = update.ExecuteReader();
    // while (reader.Read())
    // {
         // do something here?
    // }

    update.ExecuteNonQuery(); // use this if you don't need the DataReader
    conn.Close();
    conn.Dispose();
    Response.Redirect("FixtureEdit.aspx");

}

MySql Update语句（DDT-mygroupname）

1 个答案: