Question

我有一个包含多个文本框和数据表的表单，数据表绑定到文本框，我正在处理数据表的RowChanged事件。

但是，只有在加载表单时（有两个以上的文本框）才会调用RowChanged事件两次，来自数据表的数据可以很好地加载到文本框中，但是当我更改文本框中的文本时文本框没有触发事件。然而，直接从数据表显示数据显示数据已更新。

代码：

private Clients.DataSetClients.ClientsDataTable dtClients = new DataSetClients.ClientsDataTable();
private Clients.DataSetClientsTableAdapters.ClientsTableAdapter taClients = new DataSetClientsTableAdapters.ClientsTableAdapter();

    private void ClientsEdit_Load(object sender, EventArgs e)
    {
        dtClients.RowChanged += new DataRowChangeEventHandler(dtClients_RowChanged);

        taClients.FillByID(dtClients, ClientID);

        textForename.DataBindings.Add("Text", dtClients, "Forename", true, DataSourceUpdateMode.OnPropertyChanged);
        //.......
        // etc
        //.......
        textEmail.DataBindings.Add("Text", dtClients, "Email", true, DataSourceUpdateMode.OnPropertyChanged);
    }

    void dtClients_RowChanged(object sender, DataRowChangeEventArgs e)
    {
        MessageBox.Show("dtClients_RowChanged");
    }

    private void simpleButton1_Click(object sender, EventArgs e)
    {
        MessageBox.Show(dtClients.Rows[0]["Email"].ToString());
    }

Answer 1

您可以尝试连接绑定的BindingComplete事件而不是DataTable上的RowChanged事件（更多用于添加行和行位置更改等）。

private void ClientsEdit_Load(object sender, EventArgs e)
{
  // loading stuff
  Binding ForenameBinding = new Binding("Text", dtClients, "Forename", true, DataSourceUpdateMode.OnPropertyChanged);
  ForenameBinding.BindingComplete += Table_BindingComplete;
  textForename.DataBindings.Add(ForenameBinding);
  // loading stuff
}

void Table_BindingComplete(object sender, BindingCompleteEventArgs e) {
  if (e.BindingCompleteContext == BindingCompleteContext.DataSourceUpdate)
    MessageBox.Show("Source Updated!");
}

每次用户更改TextBox中的文本时，都会弹出MessageBox，因此它会在每个键击中触发。为避免这种情况，请将绑定模式更改为OnValidation：

  Binding ForenameBinding = new Binding("Text", dtClients, "Forename", true, DataSourceUpdateMode.OnValidation);

Answer 2

  private void button1_Click(object sender, EventArgs e)
        {
            List<string> names=new List<string>(){"Forename","Email","Phone"};
            foreach (var name in names)
            {
                var txt = this.Controls["text" + name] as TextBox;
                txt.DataBindings.Add("Text", dtClients, name, true, DataSourceUpdateMode.OnPropertyChanged);
            }

        }

文本框绑定更新事件

2 个答案: