大家好，又见面了，我是你们的朋友全栈君。
循环绑定数据到DropDownList1
foreach (SPList ls in web.Lists)
{
LIColl.Add(ls.Title);//将数据保存list中
}
dwlist.DataSource = LIColl;//绑定
dwlist.DataBind();//绑定
默认值
DataBound事件：
protected void DropDownList1_DataBound(object sender, EventArgs e)
{
DropDownList1.Items.Insert(0, new ListItem(“—请选择—“, “0”));
DropDownList1.SelectedIndex = 0;
}
获取选的值
写到SelectedIndexChanged事件里面
要先把dropdownlist控件的autopostback属性改为true
private void DropDownList1_SelectedIndexChanged(object sender, System.EventArgs e)
{
this.Label3.Text=this.DropDownList2.SelectedItem.ToString();//text this.Label4.Text=this.DropDownList2.SelectedValue.ToString();//value
}
如果用按钮就可以直接写
private void Button1_Click(object sender, System.EventArgs e)
{
this.Label1.Text=this.DropDownList1.SelectedItem.ToString();
this.Label2.Text=this.DropDownList1.SelectedValue.ToString();
}
转载于:https://www.cnblogs.com/914556495wxkj/p/3629850.html
发布者：全栈程序员-站长，转载请注明出处：https://javaforall.net/161241.html原文链接：https://javaforall.net
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