TextBox 控件用于创建用户可输入文本的文本框。
TextBox 控件用于创建用户可输入文本的文本框。
TextBox 控件的特性和属性列在我们的 WebForms 控件参考手册页面。
下面的实例演示了您可能会用到的 TextBox 控件的一些属性：
| <html> |
| <body> |
| <form runat="server"> |
| A basic TextBox: |
| <asp:TextBox id="tb1" runat="server" /> |
| <br /><br /> |
| A password TextBox: |
| <asp:TextBox id="tb2" TextMode="password" runat="server" /> |
| <br /><br /> |
| A TextBox with text: |
| <asp:TextBox id="tb4" Text="Hello World!" runat="server" /> |
| <br /><br /> |
| A multiline TextBox: |
| <asp:TextBox id="tb3" TextMode="multiline" runat="server" /> |
| <br /><br /> |
| A TextBox with height: |
| <asp:TextBox id="tb6" rows="5" TextMode="multiline" |
| runat="server" /> |
| <br /><br /> |
| A TextBox with width: |
| <asp:TextBox id="tb5" columns="30" runat="server" /> |
| </form> |
| </body> |
| </html> |
当表单被提交时，TextBox 控件的内容和设置可能会被服务器脚本修改。表单可通过点击一个按钮或当用户修改 TextBox 控件的值的时候进行提交。
在下面的实例中，我们在 .aspx 文件中声明了一个 TextBox 控件、一个 Button 控件和一个 Label 控件。当提交按钮被触发时，submit 子例程将被执行。submit 子例程将写入一行文本到 Label 控件中：
| <script runat="server"> |
| Sub submit(sender As Object, e As EventArgs) |
| lbl1.Text="Your name is " & txt1.Text |
| End Sub |
| </script> |
| <html> |
| <body> |
| <form runat="server"> |
| Enter your name: |
| <asp:TextBox id="txt1" runat="server" /> |
| <asp:Button OnClick="submit" Text="Submit" runat="server" /> |
| <p><asp:Label id="lbl1" runat="server" /></p> |
| </form> |
| </body> |
| </html> |
| <script runat="server"> |
| Sub change(sender As Object, e As EventArgs) |
| lbl1.Text="You changed text to " & txt1.Text |
| End Sub |
| </script> |
| <html> |
| <body> |
| <form runat="server"> |
| Enter your name: |
| <asp:TextBox id="txt1" runat="server" |
| text="Hello World!" |
| ontextchanged="change" autopostback="true"/> |
| <p><asp:Label id="lbl1" runat="server" /></p> |
| </form> |
| </body> |
| </html> |
