我在这里看不到问题，您应该能够在代码背后读取文本框的值.

I don''t see a problem here, you should be able to read the textbox value in your code-behind.

同意Shameel.只需阅读文本框&的textchanged事件中的文本即可.在标签上显示.或者，您可以在客户端使用onchange的javascript来做到这一点.

Agree with Shameel. Just read the text in textchanged event of the textbox & show that in label. Or you may do that in clientside using javascript by onchange.