是否有可能textchanged事件只發生在文本框的重點？

Question

我有這樣的方法。

public void CheckEmployee() 
    { 
      ConnectionStringSettings myConnectionString = ConfigurationManager.ConnectionStrings["LibrarySystem.Properties.Settings.LibraryConnectionString"]; 
      using (SqlConnection myDatabaseConnection = new SqlConnection(myConnectionString.ConnectionString)) 
      { 
       myDatabaseConnection.Open(); 
       using (SqlCommand mySqlCommand = new SqlCommand("Select * from Employee where EmployeeID = '" + EmployeeIDtextBox.Text + "' ", myDatabaseConnection)) 
       using (SqlDataReader sqlreader = mySqlCommand.ExecuteReader()) 
       { 

        if (sqlreader.Read()) 
        { 
         string EmployeeID = sqlreader.GetInt32(0).ToString(); 
         string Name = sqlreader.GetString(1); 
         string Address = sqlreader.GetString(2); 

         EmployeeIDtextBox.Text = EmployeeID; 
         NametextBox.Text = Name; 
         AddresstextBox.Text = Address; 
        } 
       } 
      } 
    } 

而且我必須寫這樣的代碼。

private void EmployeeIDtextBox_TextChanged(object sender, EventArgs e) 
{ 
    CheckBook(); 
    NametextBox.Clear(); 
    AddresstextBox.Clear(); 
} 

private void NametextBox_TextChanged(object sender, EventArgs e) 
{ 
    CheckBook(); 
    EmployeetextBox.Clear(); 
    AddresstextBox.Clear(); 
} 

問題是NametextBox_TextChanged也觸發當我在EmployeeIDtextBox輸入，因爲方法從數據庫中的值，並顯示它NametextBox。

NametextBox_TextChanged只有在關注NametextBox時纔可能發生？反之亦然。

謝謝:)

Answer 1

關閉我的頭頂，儘量簡單地忽略TextChanged事件如果NametextBox不集中 - 是這樣的：

private void NametextBox_TextChanged(object sender, EventArgs e) 
{ 
    if (NametextBox.IsFocused) 
    { 
     CheckBook(); 
     EmployeetextBox.Clear(); 
     AddresstextBox.Clear(); 
    } 
}