做前台功能设计的时候,遇到以下需求:
文本框显示数据库中原来的文本,鼠标点击文本框即变为编辑状态,编辑结束时执行内容存储的后台事件。
显示文本时的样式和与编辑状态时的样式风格也要求有不同。
实验中遇到以下问题:初次页面展现时,如果文本框输入不正确,触发了验证控件。改变文本框的输入正确后,焦点离开事件顺利执行。当再次将文本框的值输入异常时,验证控件没有显示异常,后台事件依然进行了。显然与逻辑不符合了,用验证控件的目的就是如果前台页面验证不满足的情况下,肯定不允许执行后台事件的。
辛苦一番之后,问题解决:
验证控件需设置以下2个属性,让其不做客户端脚本处理,直接调后台事件,但又要显示错误信息
EnableClientScript="False"
Display="Dynamic"
同时在后台TextChanged事件中也应检查页面验证的情况
protected void TextBox1_TextChanged(object sender, EventArgs e)
{
if (Page.IsValid)
{
[YourCode]
}
}
{
if (Page.IsValid)
{
[YourCode]
}
}
为了让使用效果更加友好,把这些控件又放在了UpdatePanel中。不闪的才是最好的。
测试项目
ASP.NET代码:(TextBox的样式变更,放在了皮肤文件中)
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<table id="table1" border="0" cellpadding="0" cellspacing="0" width="500">
<tr>
<td style="width:47px; font-size: 9pt;" align="center">标题1</td>
<td style="width:124px;" align="left">
<asp:TextBox ID="TextBox1" runat="server" SkinID="txtchange" OnTextChanged="TextBox1_TextChanged"
CausesValidation="True" AutoPostBack="True">你好啊!</asp:TextBox>
</td>
<td style="width:200px;" align="left"><asp:RequiredFieldValidator id="RequiredFieldValidator1" runat="server" Width="155px" ErrorMessage="必须输入" Display="Dynamic" EnableClientScript="False" ControlToValidate="TextBox1" Font-Size="Small"></asp:RequiredFieldValidator></tr>
<tr>
<td style="width:47px; font-size: 9pt;" align="center">标题2</td>
<td style="width:124px;" align="left">
<asp:TextBox ID="TextBox2" runat="server" OnTextChanged="TextBox1_TextChanged" SkinID="txtchange"
CausesValidation="True" AutoPostBack="True">heekui</asp:TextBox></td>
<td style="width:200px;" align="left">
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="TextBox2"
EnableClientScript="False" Display="Dynamic" ErrorMessage="必须输入" Width="155px" Font-Size="Small"></asp:RequiredFieldValidator></td>
</tr>
<tr>
<td style="width:100%;" colspan="3" align="left"><asp:Label ID="Label1" runat="server" Width="166px" Font-Size="Small" ForeColor="#C04000"></asp:Label>
</td>
</tr>
<tr>
<td align="left" colspan="3" style="width: 100%; font-size: 9pt;">
点击黄色区域,可进行编辑</td>
</tr>
</table>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<table id="table1" border="0" cellpadding="0" cellspacing="0" width="500">
<tr>
<td style="width:47px; font-size: 9pt;" align="center">标题1</td>
<td style="width:124px;" align="left">
<asp:TextBox ID="TextBox1" runat="server" SkinID="txtchange" OnTextChanged="TextBox1_TextChanged"
CausesValidation="True" AutoPostBack="True">你好啊!</asp:TextBox>
</td>
<td style="width:200px;" align="left"><asp:RequiredFieldValidator id="RequiredFieldValidator1" runat="server" Width="155px" ErrorMessage="必须输入" Display="Dynamic" EnableClientScript="False" ControlToValidate="TextBox1" Font-Size="Small"></asp:RequiredFieldValidator></tr>
<tr>
<td style="width:47px; font-size: 9pt;" align="center">标题2</td>
<td style="width:124px;" align="left">
<asp:TextBox ID="TextBox2" runat="server" OnTextChanged="TextBox1_TextChanged" SkinID="txtchange"
CausesValidation="True" AutoPostBack="True">heekui</asp:TextBox></td>
<td style="width:200px;" align="left">
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="TextBox2"
EnableClientScript="False" Display="Dynamic" ErrorMessage="必须输入" Width="155px" Font-Size="Small"></asp:RequiredFieldValidator></td>
</tr>
<tr>
<td style="width:100%;" colspan="3" align="left"><asp:Label ID="Label1" runat="server" Width="166px" Font-Size="Small" ForeColor="#C04000"></asp:Label>
</td>
</tr>
<tr>
<td align="left" colspan="3" style="width: 100%; font-size: 9pt;">
点击黄色区域,可进行编辑</td>
</tr>
</table>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
文本框皮肤文件:
<asp:TextBox SkinId="txtchange" onblur="this.style.backgroundColor='#FFFACD';this.style.border='solid 0px';" onfocus="this.style.backgroundColor='#FFFFFF';this.style.border='solid 1px';" runat="server" BackColor="#FFFACD" BorderStyle="Solid" BorderWidth="0px" />
后台代码:
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_PreInit(object sender, EventArgs e)
{
this.Theme = "default";
}
protected void Page_Load(object sender, EventArgs e)
{
}
protected void TextBox1_TextChanged(object sender, EventArgs e)
{
if (Page.IsValid)
{
string strOut = this.TextBox1.Text + " " + this.TextBox2.Text;
this.Label1.Text = strOut;
}
}
}
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_PreInit(object sender, EventArgs e)
{
this.Theme = "default";
}
protected void Page_Load(object sender, EventArgs e)
{
}
protected void TextBox1_TextChanged(object sender, EventArgs e)
{
if (Page.IsValid)
{
string strOut = this.TextBox1.Text + " " + this.TextBox2.Text;
this.Label1.Text = strOut;
}
}
}
示例工程下载:
/Files/heekui/TxtChange.rar