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应用场景:例如选择一个单据号打击打印后先去数据库检索是否有打打印过,如果有则提示,已打印,是否再打
如果没有则不提示,直接进行打印。
实现原理:多做一个隐藏按钮去实现打印功能,页面上的打印按钮则进行数据库的后台操作,跟据取出的数据
可以在后台直接调用打印,或用脚本调用前台confirm
代码Demo:
后台:
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace WebApplication1 { public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { //sql string result = TextBox1.Text.Trim(); if (!string.IsNullOrEmpty(result)) { Page.ClientScript.RegisterStartupScript(GetType(),"", "<script>CheckPrint(‘单号:" + result + "已打印,是否继续打印?‘)</script>"); } else { Button2_Click(sender,e); } } protected void Button2_Click(object sender, EventArgs e) { this.Response.Write("执行了!!!!"); } } }
前台:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1._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"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <script type="text/jscript"> function CheckPrint(obj) { var IsHave = confirm(obj); if (IsHave)//调用后台方法 { document.getElementById("Button2").click(); } } </script> </head> <body> <form id="form1" runat="server"> <div> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <asp:Button ID="Button1" runat="server" Text="print" OnClick="Button1_Click" /> <asp:Button ID="Button2" runat="server" Text="Button" OnClick="Button2_Click" Width="1px"/> </div> </form> </body> </html>
C#先执行一段sql等后台操作后再提示是否后续操作confrim
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原文地址:http://www.cnblogs.com/longling2344/p/5661152.html