ASP.Net文本框onblur事件 [英] ASP.Net textbox onblur event

问题描述

我有一个文本框，其值我需要验证（如果文本框的值是50，则显示lblShowMsg消息）当用户切换到该文本框（onBlur事件）的。我似乎无法得到正确的语法

I have a textbox, whose values I need to validate (if value of textbox is 50, then display message in lblShowMsg) when the user tabs out of the textbox (onBlur event). I can't seem to get the syntax right.

我有我的页面加载事件代码：

I have this code on my pageload event:

protected void Page_Load(object sender, EventArgs e)
{
    txtCategory.Attributes.Add("onblur", "validate()"); 

}

但我似乎无法得到javascript代码正确。 ？任何建议

But I can't seem to get the javascript code correct. Any suggestions?

推荐答案

在后面的代码：（VB.NET）

In the Code behind: (VB.NET)

在页面加载事件

txtAccountNumber.Attributes["onBlur"] = "IsAccNumberValid(" & txtAccountNumber.ClientID & ")";

在哪里txtAccountNumber是在标记网页的文本框的ID和你通过文本框因为客户端ID JavaScript是客户端而不是服务器端。而现在在标记页面（的.aspx）有这样的javascript在页面的头部分：

Where txtAccountNumber is the ID of the TextBox in the markup page and you pass the ClientID of the textbox because JavaScript is client side not server side. And now in the markup page(.aspx) have this javascript in the head section of the page:

<script type="text/javascript">                     
function IsAccNumberValid(txtAccountNumber) {                                             
    if (txtAccountNumber.value.length < 6) {    
                      alert(txtAccountNumber.value);
            }    
        }    
</script>

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