前端html代码
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div > <table style="500px ; text-align:left; margin:auto;"> <tr> <td style="text-align:right"> <asp:Label ID="Label1" runat="server" Text="用户名:"></asp:Label> </td> <td> <asp:TextBox ID="txtname" runat="server"></asp:TextBox> </td> </tr> <tr> <td style="text-align:right"> <asp:Label ID="Label2" runat="server" Text="密码:" ></asp:Label> </td> <td> <asp:TextBox ID="txtpwd" runat="server" TextMode="Password"></asp:TextBox> </td> </tr> <tr> <td style="text-align:right; left:50px;"> <asp:Label ID="Label3" runat="server" Text="性别:"></asp:Label> </td> <td> <asp:RadioButtonList ID="rblsex" RepeatDirection="Horizontal" runat="server" Width="173px"> <asp:ListItem Selected="True">男</asp:ListItem> <asp:ListItem>女</asp:ListItem> </asp:RadioButtonList> </td> </tr> <tr> <td style="text-align:right"> <asp:Label ID="Label4" runat="server" Text="住址:"></asp:Label> </td> <td> <asp:TextBox ID="txtaddress" runat="server"></asp:TextBox> </td> </tr> <tr> <td colspan="2" style="text-align:center;"> <asp:Button ID="btnreg" runat="server" Text="注册" onclick="btnreg_Click" /> <asp:Button ID="btncancel" runat="server" Text="重置" onclick="btncancel_Click" /> </td> </tr> </table> </div> </form> </body> </html>
后台CS代码(含如何向客户端发送js代码)
protected void btnreg_Click(object sender, EventArgs e) { if (txtname.Text.Length == 0) { Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('请输入用户名')", true); } else { if (txtpwd.Text.Trim().Length == 0) { Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('请输入密码!')", true); } else { if (txtaddress.Text.Trim().Length == 0) { Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('请输入地址!')", true); } else { this.gender = rblsex.SelectedItem.Text; } } } /* if (rblsex.SelectedIndex == 0) { // Page.ClientScript.RegisterClientScriptBlock()：添加脚本块, 页面加载前执行 //RegisterStartupScript 注册脚本并在页面加载完时执行。 Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('男')", true); //Page.ClientScript.RegisterClientScriptInclude //把JavaScript放置在.js文件中,使用RegisterClientScriptInclude方法可以注册.js文件中的 JavaScript //string myScript = “myJavaScriptCode.js” //Page.ClientScript.RegisterClientScriptInclude(“myKey”, myScript); //这将在ASP.NET页面产生如下结构： //<script src=”myJavaScriptCode.js” type=”text/javascript”></script> } else { Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('女')", true); } */ } protected void btncancel_Click(object sender, EventArgs e) { for (int i = 0; i < Page.Controls.Count; i++) { foreach (Control item in Page.Controls[i].Controls) { if (item is TextBox) { ((TextBox)item).Text=""; //对象转换 } } } }