更新按钮不起作用

我想通过C＃中的窗体按钮更新我的数据库。当我运行我将要显示的代码时，它不显示任何错误，但它不会更改数据库或数据网格中的数据。更新按钮不起作用

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!!"); 

}

来源

2013-03-07 kenbo

您是否尝试过手动运行显示的查询？ – 2013-03-07 13:33:14

您是否使用SQL Management Studio或其他SQL客户端运行生成的commang？ – 2013-03-07 13:33:31

'cmd.ExecuteNonQuery（）;'返回什么？ – 2013-03-07 13:34:10

嗨我发现了解决方案，它现在工作正常，谢谢你的时间。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）;

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

来源

2013-03-08 09:27:40 kenbo

更新按钮不起作用

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