C# 更新按钮不工作

我正试图通过C#中的windows窗体按钮更新我的数据库。当我运行即将显示的代码时，它不会显示任何错误，但不会更改数据库或数据网格中的数据

private void update_Click(object sender, EventArgs e)
{
    SqlConnection NewCon = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=E:\ASPNET\cd\cdcwk2\cddatabase.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True");
    SqlCommand cmd = new SqlCommand("UPDATE cdstock set cd_title='" + cdtext.Text + "', artist='" + artisttext.Text + "',genre='" + genretext.Text + "', rating=" + ratingtext.Text + ", cd_discription='" + distext.Text + "' where cd_id =" + idtext.Text + ";", NewCon);
    MessageBox.Show("UPDATE cdstock  set cd_title='" + cdtext.Text + "', artist='" + artisttext.Text + "',genre='" + genretext.Text + "', rating='" + ratingtext.Text + "', cd_discription='" + distext.Text + "' where cd_id ='" + idtext.Text + "'");

    NewCon.Open();

    cmd.ExecuteNonQuery();

    NewCon.Close();
    MessageBox.Show("Record Has Now Been UPDATED!!");

}

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您好，我找到了解决方案，现在效果很好，谢谢您抽出时间。解决方案如下

             String NewCon = @"Data Source=.\SQLEXPRESS;AttachDbFilename=E:\ASPNET\cd\cdcwk2\cddatabase.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True";

         SqlConnection con = new SqlConnection(NewCon);
         SqlCommand cmd = new SqlCommand();

         cmd.CommandText = "UPDATE cdstock set cd_title='" + cdtext.Text + "', artist='" + artisttext.Text + "',genre='" + genretext.Text + "', cd_discription='" + distext.Text + "', rating=" + ratingtext.Text + " where cd_id = " + dataGridView1.CurrentRow.Cells[0].Value;
         cmd.Connection = con;
         cmd.Connection.Open();

         cmd.ExecuteNonQuery();
         cmd.Connection.Close();

cddatabaseDataSet3.GetChanges（）； this.cdstockTableAdapter.Fill（this.cddatabaseDataSet3.cdstock）

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您是否尝试手动运行显示的查询？是否使用SQL Management studio或其他SQL客户端运行生成的命令？什么是

cmd.ExecuteNonQuery（）返回？请检查下一行受影响的行数，int result=cmd.ExecuteNonQuery（）；您可以运行SQL Profiler，并查看服务器上的命令，然后对其进行调试。请使用参数化查询。使用参数化查询！使用参数化查询！！-我们需要多久重复一次？
        MessageBox.Show("Record Has Now Been UPDATED!!");