C#网站开发之 CustomValidator验证控件用法

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于 2019-08-13 16:07:44 发布

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本文链接：https://blog.csdn.net/qq_38992403/article/details/99441947

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常用的几种数据验证控件有这几块
1.正则表达式验证控件:RegularExpressionValidator

     <asp:RegularExpressionValidator ID="revEmail" runat="server" 
                        ControlToValidate="tbEmail" Display="Dynamic" 
                        ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*" 
                        ErrorMessage="电子邮件格式不正确，请参照如下格式：<br/>aaa@bbb.com "></asp:RegularExpressionValidator>
                                </td>

2.非空验证控件:RequiredFieldValidator

  <asp:RequiredFieldValidator ID="rftitle" runat="server" 
ControlToValidate="tbTitle" ErrorMessage="留言标题不能为空！" 
Display="Dynamic"></asp:RequiredFieldValidator>

3.限定文字输入控件:CustomValidator

  <asp:CustomValidator ID="cvMessage" runat="server" 
                        ErrorMessage="长度应大于10，最多为8000个字符" 
                        ClientValidationFunction="MessageValidator" ControlToValidate="tbMessage" 
                        Display="Dynamic"></asp:CustomValidator>

其基本格式和包含元素如下
1.<asp:RegularExpressionValidator ID=“revEmail” runat=“server” >声明所需使用控件并且挂上ID 和 runat=“server”
2.ControlToValidate:进行绑定所需验证控件如TextBox控件的ID
3.ErrorMessage:报错所显示的信息
4.Display="Dynamic 用于防止错误信息不那么密集(非必须)

在正则表达式中需要用ValidationExpression=""填写正则表达式的规则

在限定文字中需添加代码来验证的自定义客户端脚本函数的名称。

  <script language="javascript" type="text/javascript">
        function MessageValidator(source,argument)
        {
		    if(argument.Value.length > 10 && argument.Value.length < 8000)argument.IsValid = true;
		    else argument.IsValid = false;
        }
    </script>

写一个页面传值入数据库另一个页面通过数据库读取数据的
简易邮件模式

分为两张aspx 其中用到 ef 实体模型用于快速添加数据库结构

<%@ 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>写邮件</title>
    <style type="text/css">
        .style1
        {
            width: 86px;
        }
    </style>
     <script language="javascript" type="text/javascript">
        function MessageValidator(source,argument)
        {
		    if(argument.Value.length > 10 && argument.Value.length < 8000)argument.IsValid = true;
		    else argument.IsValid = false;
        }
    </script>
</head>
<body style="font-size:12px">
    <form id="form1" runat="server">
    <div>    
    <table border="0" cellpadding="1" cellspacing="2" bgcolor="#CCCC00">
      <tr>
        <td height="25" colspan="2" bgcolor="#FFFFFF">&nbsp;&nbsp;&nbsp;
            <asp:Label ID="Label1" runat="server" Text="&gt;&gt; 签写留言"></asp:Label>
        </td>
      </tr>
      <tr>
        <td height="25" colspan="2" bgcolor="#FFFFFF">
            <table border="0" cellpadding="1" cellspacing="2">             
              <tr>
                <td height="22" align="right" valign="middle" bgcolor="#FFFFFF" class="style1">留言标题：</td>
                <td height="22" align="left" valign="middle" bgcolor="#FFFFFF">
                    <asp:TextBox ID="tbTitle" runat="server" Width="300px" 
                        MaxLength="100"></asp:TextBox>
                    <asp:RequiredFieldValidator ID="rftitle" runat="server" 
                        ControlToValidate="tbTitle" ErrorMessage="留言标题不能为空！" Display="Dynamic"></asp:RequiredFieldValidator>       
                                </td>
              </tr>
              <tr>
                <td height="22" align="right" valign="middle" bgcolor="#FFFFFF" class="style1">
                    E-mail地址：</td>
                <td height="22" align="left" valign="middle" bgcolor="#FFFFFF">
                    <asp:TextBox ID="tbEmail" runat="server" Width="260px" 
                        MaxLength="100"></asp:TextBox>
                                <asp:RequiredFieldValidator ID="rfEmail" runat="server" 
                        ControlToValidate="tbEmail" Display="Dynamic" ErrorMessage="E-mail地址不能为空！"></asp:RequiredFieldValidator>
                    <asp:RegularExpressionValidator ID="revEmail" runat="server" 
                        ControlToValidate="tbEmail" Display="Dynamic" 
                        ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*" 
                        ErrorMessage="电子邮件格式不正确，请参照如下格式：<br/>aaa@bbb.com "></asp:RegularExpressionValidator>
                                </td>
              </tr>
              <tr>
                <td height="22" align="right" valign="middle" bgcolor="#FFFFFF" class="style1">留言内容：</td>
                <td height="22" align="left" valign="middle" bgcolor="#FFFFFF">
                    <asp:TextBox ID="tbMessage" runat="server" Rows="6" TextMode="MultiLine" 
                        Width="300px"></asp:TextBox>
                    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" 
                        ControlToValidate="tbMessage" Display="Dynamic" ErrorMessage="留言内容不能为空！"></asp:RequiredFieldValidator>
                    <asp:CustomValidator ID="cvMessage" runat="server" 
                        ErrorMessage="长度应大于10，最多为8000个字符" 
                        ClientValidationFunction="MessageValidator" ControlToValidate="tbMessage" 
                        Display="Dynamic"></asp:CustomValidator>
                                </td>
              </tr>
              <tr>
                <td height="22" align="right" valign="middle" bgcolor="#FFFFFF" class="style1">&nbsp;</td>
                <td height="22" align="left" valign="middle" bgcolor="#FFFFFF">
                    <asp:Button ID="btnSend" runat="server" Text="发表" onclick="btnSend_Click" />
                    &nbsp;&nbsp;&nbsp;
                    <asp:Button ID="btnReset" runat="server" Text="清空" CausesValidation="False" 
                        onclick="btnReset_Click" UseSubmitBehavior="False" />
            </td>
              </tr>
            </table>
        </td>
      </tr>
    </table>           
    </div>
    </form>
</body>
</html>

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
       


    }
    protected void btnSend_Click(object sender, EventArgs e)
    {
        db_22Entities lqDB = new db_22Entities();
        Leaveword info = new Leaveword();
        //要添加的内容        
        info.Title = tbTitle.Text;
        info.Email = tbEmail.Text;
        info.Message = tbMessage.Text;
        info.AddDate = DateTime.Now;
        //执行添加
        lqDB.Leaveword.Add(info);
        lqDB.SaveChanges();
        Page.ClientScript.RegisterStartupScript(GetType(), "", "alert('留言成功!');location.href='Default.aspx';", true);
    }
    protected void btnReset_Click(object sender, EventArgs e)
    {
        tbTitle.Text = tbEmail.Text = tbMessage.Text = string.Empty;



    }   
}

读取邮件

<%@ 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>读取邮件</title>
</head>
<body style="font-size:12px">
    <form id="form1" runat="server">
    <div>
    
        <asp:GridView ID="GridView1" runat="server" BackColor="White" 
            BorderColor="#E7E7FF" BorderStyle="None" BorderWidth="1px" CellPadding="3" 
            GridLines="Horizontal">
            <FooterStyle BackColor="#B5C7DE" ForeColor="#4A3C8C" />
            <RowStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" />
            <PagerStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" HorizontalAlign="Right" />
            <SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="#F7F7F7" />
            <HeaderStyle BackColor="#4A3C8C" Font-Bold="True" ForeColor="#F7F7F7" />
            <AlternatingRowStyle BackColor="#F7F7F7" />
        </asp:GridView>
    
    </div>
    </form>
</body>
</html>

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        db_22Entities lqDB = new db_22Entities();

        


        var result = from r in lqDB.Leaveword
                     where r.id > 0
                     select r;
        GridView1.DataSource = result.ToList();
        GridView1.DataBind();

    }
}

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C#网站开发之 CustomValidator验证控件用法

常用的几种数据验证控件有这几块1.正则表达式验证控件:RegularExpressionValidator <asp:RegularExpressionValidator ID="revEmail" runat="server" ControlToValidate="tbEmail" Display="Dynamic" ...
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