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();
    }
}            

 或简单点：

private void Form1_Load(object sender, EventArgs e)
{
    int nMax = 100;
    progressBar1.Maximum = nMax;

    Task.Factory.StartNew(() =>
    {
        for (int i = 1; i <= 100; i++)
        {
            SetVal(i, nMax);
            Thread.Sleep(50);
        }
    });
}

private void SetVal(int nVal, int nMax)
{
    if (this.InvokeRequired)
        this.BeginInvoke(new Action(() => { SetVal(nVal, nMax); }));
    else
    {
        textBox1.Text = nVal.ToString();
        progressBar1.Value = nVal;
        label1.Text = $"{nVal}/{nMax}";
    }
}