<!--客户端--><script language="javascript" type="text/javascript">function clearControl() {var Input = div1.getElementsByTagName("input");for (var i = 0; i < Input.length; i++) {if (Input[i].type == "text") {Input[i].value = "";}}return false;}</script><form id="form1" runat="server"><div><div id="div1"><asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><asp:TextBox ID="TextBox3" runat="server"></asp:TextBox><asp:TextBox ID="TextBox4" runat="server"></asp:TextBox><asp:TextBox ID="TextBox5" runat="server"></asp:TextBox></div><asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="return clearControl()" /><asp:Button ID="Button2" runat="server" Text="Button" OnClick="Button2_Click" /></div></form><!--直接在客户端调用了就清除了不要去服务器端-->
//还有一种就是经过服务器然后在调用javascript比如注册成功后提示成功在清空TextBoxprotected void Button2_Click(object sender, EventArgs e){ClientScriptManager cs = Page.ClientScript;Type type = Page.GetType();string key = "key";//判断是否已经注册 if (!cs.IsClientScriptBlockRegistered(type, key)){//此方法是在一开始就加载此方法cs.RegisterClientScriptBlock(type, key, "alert('注册成功')", true);}if (!cs.IsStartupScriptRegistered(type, key)){//这个方法是在</from>结束标签后调用,因为在这里要调用div,所以要等这些控件加载后才能调用 cs.RegisterStartupScript(type, key, "clearControl()", true);}}//服务器端//定义一个方法做递归查找private void ClearControl(System.Web.UI.Control page){int count = page.Controls.Count;for (int i = 0; i <count; i++){foreach(System.Web.UI.Control con in page.Controls[i].Controls){if(con.HasControls()){ClearControl(con);}else{if (con is TextBox){(con as TextBox).Text = string.Empty; }}} }}protected void Button1_Click(object sender, EventArgs e){ ClearControl(Page); }
