软件设计开发 .NET UML OO DataBase c#,winform,progressbar+labe, 联动显示进度

private void btnCount_Click(object sender, EventArgs e)
{
label1.Visible=true;
progressBar.Visible = true;
progressBar.Minimum = 0;
progressBar.Maximum = ds.Tables["表"].Rows.Count;
progressBar.BackColor = Color.Green;
for (int i = 0; i < ds.Tables["表"].Rows.Count; i++) 
{
progressBar.Value++;
Application.DoEvents();
this.label1.Text = Convert.ToString(progressBar.Value);
 }
}

或者

private void btnCount_Click(object sender, EventArgs e)
        {
            label1.Visible=true;
            progressBar.Visible = true;
            progressBar.Minimum = 0;
            progressBar.Maximum = ds.Tables["表"].Rows.Count;
            progressBar.BackColor = Color.Green;
            for (int i = 0; i  < ds.Tables["表"].Rows.Count; i++)
            {
               progressBar.Value++;
               Application.DoEvents();
                this.label1.Text = Convert.ToString(progressBar.Value);this.label1.Refresh();
            }

        }