MutiLoad控件
1
using System;
2using System.Data;
3using System.Configuration;
4using System.Web;
5using System.Web.Security;
6using System.Web.UI;
7using System.Web.UI.WebControls;
8using System.Web.UI.WebControls.WebParts;
9using System.Web.UI.HtmlControls;
10using System.Web.UI.MobileControls;
11using System.Collections.Generic;
12
13
14namespace WebApplication1
15
{
16
public class MutiLoad:WebControl
17
{
18 string strFiles = "";
19 List<int> list = new List<int>();
20
21 public int Count
22 {
23 get
24 {
25
26 return list.Count;
27
}
28 }
29 public int[] FileIndex
30 {
31 get
32 {
33 return list.ToArray();
34 }
35 }
36 protected override void OnLoad(EventArgs e)
37 {
38 base.OnLoad(e);
39 if (Page.IsPostBack)
40 {
41 if (Page.Request.Form["hidvalue"] == null)
42 strFiles ="";
43 else
44 strFiles = ","+Page.Request.Form["hidvalue"].Trim(',')+",";
45 HttpFileCollection files1 =HttpContext.Current.Request.Files;
46 for (int i = 0; i < files1.Count; i++)
47 {
48 if (CheckFile(files1[i].FileName))
49 list.Add(i);
50 }
51
52 }
53 }
54 private bool CheckFile(string FileName)
55 {
56 if (strFiles.IndexOf("," + FileName + ",") == -1)
57 return false;
58 strFiles = strFiles.Replace(FileName + ",","");
59 return true;
60 }
61 protected override void OnPreRender(EventArgs e)
62 {
63 if (!Page.ClientScript.IsClientScriptBlockRegistered("MyJavaScript"))
64 {
65 Page.ClientScript.RegisterClientScriptBlock
66 (Page.GetType(), "MyJavaScript", strScript);
67 }
68 base.OnPreRender(e);
69 HtmlForm form = this.Page.Form;
70 if ((form != null) && (form.Enctype.Length == 0))
71 {
72 form.Enctype = "multipart/form-data";
73 }
74 }
75 protected override void Render(HtmlTextWriter writer)
76 {
77 base.Render(writer);
78 writer.Write("<input type='hidden' id='hidvalue' name='hidvalue' />");
79 writer.Write(strTable);
80 }
81
82 WriteTable#region WriteTable
83 private readonly string strTable = @" <table border='0' cellpadding='0' cellspacing='0' width='100%'>
84 <tr>
85 <td>
86 <p id='MyFile'>
87 <span num='1'>
88 <input type='file' size='60' name='File' style='width:100%;height:25px' /></span></p>
89 </td>
90 <td align='left' style='width:100px'>
91 <input type='button' value='增加' onclick='addFile()' />
92 <input type='button' value='删除'
93 onclick='javascript:removeOptionSelected()' />
94 </td>
95 </tr>
96 <tr>
97 <td colspan='2' align='left'>
98 <select size='10' name='SelectListBox' id='SelectListBox' style='width:100%'>
99 </select>
100 </td>
101 </tr>
102 </table>";
103 #endregion
104 script#region script
105 private readonly string strScript = @"<script language='JavaScript' type='text/javascript'>
106 <!--
107var count =1;
108 var SelectControlID='SelectListBox';
109 function addFile()
110 {
111
112 if(!CheckFile())
113 return;
114 count++;
115 var str = ""<span Num='""+count+""'><INPUT type='file' size='60' NAME='File' style='width:100%;height:25px'/></span>"";
116 document.getElementById('MyFile').insertAdjacentHTML('beforeEnd',str)
117 }
118 function CheckFile()
119 {
120 var filenames = document.getElementById('MyFile').getElementsByTagName('span');
121 for(var i =0;i<filenames.length;i++)
122 {
123 if( filenames[i].getAttribute('Num') == count)
124 {
125 var file = filenames[i].getElementsByTagName('input').item(0).value;
126 if(file == '')
127 {
128 alert('请选择文件');
129 return false;
130 }
131 if(CheckOption(file))
132 {
133 alert('文件已经在列表中存在。');
134 return false;
135 }
136 filenames[i].style.display='none';
137 appendOptionLast(file);
138 return true;
139 }
140
141 }
142 return true;
143 }
144 function CheckUpload()
145 {
146 var str = getOption();
147 if(str == '')
148 {
149 alert('请选择要上载的文件。');
150 return false;
151 }
152 document.all.hidvalue.value=str;
153 return true;
154 }
155
156
157 function insertOptionBefore(num)
158 {
159 var elSel = document.getElementById(SelectControlID);
160 if (elSel.selectedIndex >= 0) {
161 var elOptNew = document.createElement('option');
162 elOptNew.text = num;
163 elOptNew.value = num;
164 var elOptOld = elSel.options[elSel.selectedIndex];
165 try {
166 elSel.add(elOptNew, elOptOld); // standards compliant; doesn't work in IE
167 }
168 catch(ex) {
169 elSel.add(elOptNew, elSel.selectedIndex); // IE only
170 }
171 }
172 }
173
174 function removeOptionSelected()
175 {
176 var elSel = document.getElementById(SelectControlID);
177 var i;
178 for (i = elSel.length - 1; i>=0; i--) {
179 if (elSel.options[i].selected) {
180 elSel.remove(i);
181 }
182 }
183 }
184
185 function appendOptionLast(num)
186 {
187 var elOptNew = document.createElement('option');
188 elOptNew.text = num;
189 elOptNew.value =num;
190 var elSel = document.getElementById(SelectControlID);
191
192 try {
193 elSel.add(elOptNew, null); // standards compliant; doesn't work in IE
194 }
195 catch(ex) {
196 elSel.add(elOptNew); // IE only
197 }
198 }
199
200 function removeOptionLast()
201 {
202 var elSel = document.getElementById(SelectControlID);
203 if (elSel.length > 0)
204 {
205 elSel.remove(elSel.length - 1);
206 }
207 }
208 function getOption(split)
209 {
210 if(!split)
211 split = ',';
212 var elSel = document.getElementById(SelectControlID);
213 var i;
214 var str='';
215 for (i = elSel.length - 1; i>=0; i--) {
216 str+=elSel.options[i].value+split;
217 }
218 return str;
219 }
220 function CheckOption(value)
221 {
222 var elSel = document.getElementById(SelectControlID);
223 var i;
224 for (i = elSel.length - 1; i>=0; i--) {
225 if(elSel.options[i].value == value)
226 return true;
227 }
228 return false;
229 }
230 //-->
231</script>";
232 #endregion
233 }
234
}
235
使用方法如下：
在页面中加入上面的控件，ID为：FileUpLoadEx1
使用方法code
1if (FileUpLoadEx1.Count == 0)
2 {
3 InfoTips = "请选择要上传的文件.";
4 return;
5 }
6 HttpFileCollection files = HttpContext.Current.Request.Files;
7 bool IsError = false;
8 foreach (int i in FileUpLoadEx1.FileIndex)
9 {
10 try
11 {
12 uploadfile(files[i], folder);
13 InfoTips = string.Format("文件\"{0}\"上载成功!", files[i].FileName);
14 }
15 catch (Exception ee)
16 {
17 IsError = true;
18 InfoTipsLog.Exception(string.Format("文件\"{0}\"上载出错!错误:{1}", files[i].FileName, ee.Message));
19