确定哪个文本框已触发文本更改事件

I have a number of text boxes that are dynamically created via code.

我有许多通过代码动态创建的文本框。

I would like to be able to assign a generic event handler to all the textboxes for the text changed even and then within the handler determine which text box has fired the event.

我希望能够为所有文本框分配一个通用事件处理程序,以便更改文本,然后在处理程序中确定哪个文本框已触发事件。

Code I have is:

我的代码是:

txtStringProperty.TextChanged += TextBoxValueChanged;

private void TextBoxValueChanged(object sender, RoutedEventArgs e)
{
    string propertyName = // I would like the name attribute of the textbox here
}

Please let me know if you require anymore information.

如果您需要更多信息,请告诉我。

3 个解决方案

#1

The sender parameter contains which control has fired the event. You can cast it to a TextBox and get the name property from it:

sender参数包含触发事件的控件。您可以将其强制转换为TextBox并从中获取name属性:

string propertyName = ((TextBox)sender).Name;

#2

Cast object sender(your textbox which fired event) to TextBox.

将对象发送者(您触发事件的文本框)转换为TextBox。

If only one property is what you want then write

如果只有一个属性是你想要的那么写

string propertyName = ((TextBox)sender).Name;

But when more than one property is required, then it is better to create a Textbox variable and use it like.

但是当需要多个属性时,最好创建一个Textbox变量并使用它。

TextBox txtbox =  (TextBox)sender;

Then you can use any property of it like

然后你可以使用它的任何属性

string propertyName = txtbox.Name; 

MessageBox.Show(proptertyName);
MessageBox.Show(txtbox.Content.ToString());

#3

My advice is to look at the base class hierarchy at MSDN and just cast the control to it and extract the properties defined on it:

我的建议是在MSDN上查看基类层次结构,然后将控件转换为它并提取在其上定义的属性:

var name = ((ContentControl) sender).Name;

this is also a good practice for a more generic implementation because casting it to 'TextBox' means you can apply the handling logic to that type of control only.

对于更通用的实现,这也是一种很好的做法,因为将其转换为“TextBox”意味着您只能将处理逻辑应用于该类型的控件。

#1