Question

ASP.NET 如何点击取消按钮 使得控件内的内容都消失掉

string filename = TextBox1.Text; string sebj = DropDownList1.Text; string filtyp = DropDownList2.Text; string teach = DropDownList3.Text; string filadd = FileUpload1.FileName;

Answer 1

没太明白你的意思，但是你给取消写一个事件，把里面的控件都赋成空值不就完了
前台：
<asp:Button ID="BtnReg" Text ="取消" runat="server" onclick="BtnReg_Click" />
后台
protected void BtnReg_Click(object sender, EventArgs e)
{
TextBox1.Text = "";
DropDownList1.Text = "";
DropDownList2.Text = "";
DropDownList3.Text = "";
FileUpload1.FileName = "";
}