<div>        <h1>RequiredFieldValidator 驗證控件</h1>          用戶名：        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>        <asp:RequiredFieldValidator ID="RequiredFieldValidator1" ControlToValidate="TextBox1" runat="server" Display="Dynamic"
               ErrorMessage="用戶名不能為空！"></asp:RequiredFieldValidator>        <br/>        <asp:Button ID="Button1" runat="server" Text="登錄"></asp:Button>        <hr/>        <hr/><span style="font-size:12px;"></div></span>

<div>        <h1>CompareValidator 驗證控件</h1>          價格:        <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>                 <asp:CompareValidator ID="CompareValidator" runat="server" ControlToValidate="TextBox2"             ErrorMessage="輸入大于0的數值" Operator="GreaterThan" Type="Double" ValueToCompare="0">        </asp:CompareValidator>        <asp:Button ID="Button2" runat="server" Text="提交"/>        <hr/>        <hr/></div>

<div>          <h1>RangeValidator 控件</h1>            價格：          <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>          <asp:RangeValidator ID="RangeValidator" runat="server" ControlToValidate="TextBox3"               ErrorMessage="請輸入300~900之間的數" MaximumValue="900" MinimumValue="300" Type="Double" >          </asp:RangeValidator>  </div>  

<div>        <h1>RegularExpressionValidator 控件</h1>          電話號碼：        <asp:TextBox ID="TextBox4" runat="server"/>        <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="TextBox4"             Display="Dynamic" ErrorMessage="輸入合格電話號碼如423-875416952" ValidationExpression="(/(/d{3}/)|/d{3}-)?/d{8}"/>        <asp:Button ID="Button3" runat="server" Text="提交"/></div>

<div>        <h1>CustomValidator控件</h1>        <table>            <tr>                <td style="width:100px" align="right">用戶名</td>                <td style="width:100px">                    <asp:TextBox ID="TextBox5" runat="server"/>                </td>            </tr>            <tr>                <td style="width:100px" align="right">密碼</td>                <td style="width :100px">                    <asp:TextBox ID="TextBox6" runat="server"/>                </td>            </tr>            <tr>                <td style="width:100px">                </td>                <td style="width:100px">                <asp:Button ID="Button4" runat="server" Text="提交"/>                </td>            </tr>            <tr>                <td style="width:100px"/>                <td style="width:150px">                    <asp:CustomValidator ID="CustomValidator1" runat="server" ErrorMessage="用戶名或密碼錯誤"                        ValidateEmptyText="true" ControlToValidate="TextBox6" OnServerValidate="CustomValidator1_ServerValidate"                        DisPlay="Dynamic">                    </asp:CustomValidator>                </td>            </tr>        </table>    </div>

 //自定義驗證函數        private bool IsPassed(string userName, string passWord)        {            if (userName == "zhouzhou" && password == "123456")                return true;            else                return false;        }        protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)        {            if (IsPassed(this.TextBox5.Text.ToString(), this.TextBox6.Text.ToString()))//調用自定義函數                args.IsValid = true;//通過驗證            else                args.IsValid = false;//未通過驗證        }