关于下拉列表更改事件 [英] about dropdown list changed event

问题描述

我想在下拉列表中更改事件的标签中显示消息..

但是当我选择下拉值时它会转到更改事件但是它默认值...所以PLZ帮助我...

i want to display message in label on changed event of dropdownlist..
but when i select dropdown value then it goes to change event but it takes by default value...so plz help me...

推荐答案

这是因为您直接在Page_Load事件中绑定了下拉列表。尝试绑定DropDownList，如下所示：

This is happening just because you bound your dropdownlist in Page_Load event directly. Try binding your DropDownList like this:

protected void Page_Load(object sender, EventArgs e) 
{
    if(!IsPostBack)
    {
        DropDown1.DataSource = YourDataSource;
        DropDown1.DataTextField = "YourDataTextField";
        DropDown1.DataValueField = "YourDataValueField";
        DropDown1.DataBind();
    }
}

--Amit

--Amit

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