Code1 using System;
2 using System.Text;
3 using System.Collections;
4 using System.ComponentModel;
5 using System.Data;
6 using System.IO;
7 using System.Drawing;
8 using System.Web;
9 using System.Web.SessionState;
10 using System.Web.UI;
11 using System.Web.UI.WebControls;
12 using System.Web.UI.HtmlControls;
13
14 namespace wuliang
15 {
16 public class WebForm1 : System.Web.UI.Page
17 {
18 protected System.Web.UI.WebControls.TextBox TextBox1;
19 protected System.Web.UI.WebControls.TextBox TextBox2;
20 protected System.Web.UI.WebControls.Button Button1;
21 protected System.Web.UI.WebControls.Button Button2;
22
23 private void Page_Load(object sender, System.EventArgs e)
24 {
25 }
26
27 #region Web
28 override protected void OnInit(EventArgs e)
29 {
30 InitializeComponent();
31 base.OnInit(e);
32 }
33
34 private void InitializeComponent()
35 {
36 this.Button1.Click += new System.EventHandler(this.Button1_Click);
37 this.Button2.Click += new System.EventHandler(this.Button2_Click);
38 this.Load += new System.EventHandler(this.Page_Load);
39
40 }
41 #endregion
42
43 // let the button1 do the check ,
44 // if ng, make the textbox bdcolor red,
45 // if ok, make the textbox bdcolor white, and call the doDownload method.
46 private void Button1_Click(object sender, System.EventArgs e)
47 {
48 if (string.Compare(this.TextBox1.Text,this.TextBox2.Text)>0)
49 {
50 this.TextBox1.BackColor=System.Drawing.Color.Red;
51 this.TextBox2.BackColor=System.Drawing.Color.Red;
52 }
53 else
54 {
55 this.TextBox1.BackColor=System.Drawing.Color.White;
56 this.TextBox2.BackColor=System.Drawing.Color.White;
57 doDownload();
58
59 // You can try the method what you have done yestoday to see the result again
60 // Comment out the doDownload() before and run the source down↓
61
62 // String test="aaaaaaaaaaaaaaaaaaaaaaaa";
63 // Response.Clear();
64 // Response.ClearHeaders();
65 // Response.Buffer=false;
66 // Response.ContentType="application/octet-stream";
67 // Response.AppendHeader("Content-Disposition","attachment;filename=test");
68 // Response.Write(test.ToCharArray(0,test.Length),0,test.Length);
69 // Response.Flush();
70 // Response.End();
71 }
72
73 }
74
75 // let the button2 to do the download
76 private void Button2_Click(object sender, System.EventArgs e)
77 {
78 String test="aaaaaaaaaaaaaaaaaaaaaaaa";
79 Response.Clear();
80 Response.ClearHeaders();
81 Response.Buffer=false;
82 Response.ContentType="application/octet-stream";
83 Response.AppendHeader("Content-Disposition","attachment;filename=test");
84 Response.Write(test.ToCharArray(0,test.Length),0,test.Length);
85 Response.Flush();
86 Response.End();
87 }
88
89 // RegisterStartupScript a client StartupScript, let the client javascript to call the Button2's click method
90 private void doDownload()
91 {
92 StringBuilder builder = new StringBuilder();
93 String newLine = Environment.NewLine;
94 builder.Append("<script language=\"javascript\">");
95 builder.Append(newLine);
96 builder.Append("document.all.Button2.click(); ");
97 builder.Append(newLine);
98 builder.Append("</script>");
99 this.Page.RegisterStartupScript("downld",builder.ToString(0,builder.Length));
100
101 }
102 }
103 }
104