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
     
      (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
     
      (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            }        }