如何在asp.net中使用标签绑定文本框值 [英] how to bound a textbox value with a label in asp.net

问题描述

如何使用asp.net中的标签绑定TextBox值，这样无论在TextBox中输入什么，它都会在标签中同时反映出来。

how to bound a TextBox value with a label in asp.net, SO that whatever be typed in the TextBox it reflects the same in same time in the label.

推荐答案

您可以使用TextBox TextChanged事件来执行此操作。在文本框中输入的文本将在按下后输入中显示在标签中

You can use the TextBox TextChanged Event to do that.. Text Entered in Textbox will be displayed in Label after hitting enter

protected void TextBox1_TextChanged(object sender, EventArgs e)
{
    Label1.Text = TextBox1.Text;
}

希望gona帮助......

Hope that gona help...

你可以使用javascript

u can use javascript

<script type="text/javascript">
function CalculateBMI() {
            var Weight = parseFloat(document.getElementById('<%=txtWeigh %>').value);
            var Height = parseFloat(document.getElementById('<%=txtHeight %>').value);
            if (!isNaN(Weight) && !isNaN(Height)) {
                var Ms = parseFloat((Height) / 100);
                document.getElementById('<%lblBmi%>').value = parseFloat((Weight) / (Ms * Ms));
                return false;
            }
            else {
                document.getElementById('<%lblBmi%%>').value = "";
                return false;
            }
        }
 </script>;

这些是您要调用的文本框javascript方法

these are ur textboxes to call javascript method

<asp:TextBox ID="txtWeight" runat="server"

                onkeyup="CheckFirstChar1(this);CalculateBMI();"

                ></asp:TextBox>

 <asp:TextBox ID="txtHeight" runat="server"

                onkeyup="CheckFirstChar1(this);CalculateBMI();"

                ></asp:TextBox>

如果解决问题，请接受答案。

Accept as answer if solve you problem.

<script>
        function WriteText()
        {
            var TextBox1= document.getElementById('TextBox1');
            var Label1= document.getElementById('Label1');
            Label1.innerText=TextBox1.value;
        }
    </script>

使用此WriteText函数的onkeyup = WRITETEXT（）;文本框



喜欢这个

use this WriteText function on onkeyup="WriteText();" of textbox

like this

<asp:textbox id="TextBox1" onkeyup="WriteText();" runat="server" xmlns:asp="#unknown"></asp:textbox>

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