遇到过要在工作线程中去更新UI以让用户知道进度，而在多线程中直接调用UI控件操作是错误的做法。
最后解决方法是将操作UI的代码封装，通过Invoke / BeginInvoke 去委托调用。
private void UpdatelblText(string str)
{
if (lblText.InvokeRequired)
{
lblText.Invoke(new Action<string>(UpdatelblText), str);
}
else
{
lblText.Text = str;
}
}
或
private void ChangeColor(int row, string ShowColor, string InvoiceStatus, string PrintStatus)
{
if (dataGridView1.InvokeRequired)
{
this.Invoke(new Action<int, string, string, string>(ChangeColor), new object[] { row, ShowColor, InvoiceStatus, PrintStatus });
}
else
{
if (ShowColor == "Green")
{
dataGridView1.Rows[row].DefaultCellStyle.BackColor = Color.Green;
dataGridView1.Rows[row].DefaultCellStyle.ForeColor = Color.White;
}
else if (ShowColor == "Yellow")
{
dataGridView1.Rows[row].DefaultCellStyle.BackColor = Color.Yellow;
dataGridView1.Rows[row].DefaultCellStyle.ForeColor = Color.Black;
}
else if (ShowColor == "Red")
{
dataGridView1.Rows[row].DefaultCellStyle.BackColor = Color.Red;
dataGridView1.Rows[row].DefaultCellStyle.ForeColor = Color.White;
}
dataGridView1.Rows[row].Cells[2].Value = InvoiceStatus;//开票状态
dataGridView1.Rows[row].Cells[3].Value = PrintStatus;//打印状态
} }