行篩選器崩潰，System.Data.EvaluateException C＃應用程序是未處理的消息

Question

我想添加一行篩選功能在我的DataGridView但不斷收到以下錯誤消息：

System.Data.EvaluateException was unhandled 
Message: An unhandled exception of type 'System.Data.EvaluateException' occurred in System.Data.dll 
Additional information: Cannot perform 'Like' operation on System.Int32 and System.String. 

這種情況發生，每次我在我的文本框中輸入內容。任何想法爲什麼？代碼如下：

的App.config

​​

Form1.cs的

// driver no search 

    private void driverNo_TextChanged(object sender, EventArgs e) 
    { 
     BindingSource bs = new BindingSource(); 
     bs.DataSource = dataGridView1.DataSource; 
     bs.Filter = "DriverNo like '%" + driverNo.Text + "%'"; 
     dataGridView1.DataSource = bs; 
    } 

Answer 1

試試這個在Form1.cs

private void driverNo_TextChanged(object sender, EventArgs e) 
    { 

     if (string.IsNullOrEmpty(driverNo.Text)) 
     { 
      ((DataTable)dataGridView1.DataSource).DefaultView.RowFilter = string.Empty; 
      return; 
     } 

     int _driverNo; 

     if (int.TryParse(driverNo.Text,out _driverNo)) 
      ((DataTable)DataGridViews.DataSource).DefaultView.RowFilter = "DriverNo = " + _driverNo; 
     else 
      MessageBox.Show("Invalid driver no."); 
    }