1 //使用FileUpload，ListBox1控件实现图片的批量上传
2 //原理：通过FileUpload控件向listbox中
3 //添加图片（实际在listbox里显示的是图片在服务器中的路径）
4 //点击上传后，图片会动态显示在listbox下方的div控件里，而且可为图片添加
5 //标签，描述等 做的比较粗糙，还请各位大牛勿喷，有需要改进的地方请指正
6
7 public partial class Control_批量上传 : System.Web.UI.UserControl
8 {
9 //Business层的类 usrInfo
10 usrInfo oneUsr =
new usrInfo();
11 protected void Page_Load(
object sender, EventArgs e)
12 {
13 //点击“上传”按钮 页面将会刷新，所以需要重新加载所有动态的控件
14 //用ViewState来保持客户端和服务器端往返的状态
15 if (ViewState[
"img0"] !=
null && (
bool)ViewState[
"img0"])
16 {
17 //container 是页面div的ID
18 container.Visible =
false;
19 CreateMyControls();
20 }
21 }
22 //向listbox 中添加图片（路径）
23 protected void btn_add_Click(
object sender, EventArgs e)
24 {
25 if (FileUpload1.HasFile)
26 {
27 string name =
FileUpload1.FileName;
28 string time = DateTime.Now.ToString(
"yyyymmddhhmmssffff");
29 int n = name.LastIndexOf(
'.');
//查找name中‘.’的索引
30 string suffix =
name.Substring(n);
31 //限制图片的格式
32 if (suffix ==
".jpg" || suffix ==
".png" || suffix ==
".bmp" || suffix ==
".jpeg")
33 {
34 string newName =
name.Insert(n, time);
35 string path = Server.MapPath(
"~//picture//" +
newName);
36 FileUpload1.SaveAs(path);
37 ListBox1.Items.Add(newName);
38 }
39 else
40 {
41 Response.Write(
"<script>alert('暂不支持上传格式!')</script>");
42 }
43 }
44 }
45
46
47 private void CreateMyControls()
48 {
49 int i =
0;
50 //动态添加控件
51 foreach (ListItem ItemValue
in ListBox1.Items)
52 {
53 Image img =
new Image();
54 //以下的Image,TextBox等控件之所以进行ID“有序”赋值，是因为上传到数据库的时候需要抓取这些html控件
55 img.ID =
"img" +
i;
56 ViewState[
"img" + i] =
true;
57 img.ImageUrl =
"~//picture//" +
ItemValue;
58 img.Height =
new Unit(
100);
59 img.BorderWidth =
new Unit(
"0.2cm");
60 img.Attributes.Add(
"onmouseout",
"this.style.border='0.2cm solid gainsboro'");
61 img.Attributes.Add(
"onmouseover",
"this.style.border='0.2cm solid black'");
62
63 TextBox txt_content =
new TextBox();
64 txt_content.ID =
"txt_content" +
i;
65
66 ViewState[
"txt_content" + i] =
true;
67 txt_content.Text =
"描述";
68 txt_content.TextMode =
TextBoxMode.MultiLine;
69
70 TextBox txt_title =
new TextBox();
71 txt_title.ID =
"txt_title" +
i;
72 ViewState[
"txt_title" + i] =
true;
73 txt_title.Text =
"标题";
74
75 TextBox txt_tags =
new TextBox();
76 txt_tags.ID =
"txt_tags" +
i;
77 ViewState[
"txt_tags" + i] =
true;
78 txt_tags.Text =
"标签";
79
80 txt_title.Width =
new Unit(
180);
81 txt_title.Height =
new Unit(
10);
82 txt_tags.Width =
new Unit(
180);
83 txt_tags.Height =
new Unit(
10);
84 txt_content.Width =
new Unit(
180);
85 txt_content.Height =
new Unit(
60);
86
87 //使用asp:Literal控件显示Html代码
88 Literal li1 =
new Literal();
89 Literal li2 =
new Literal();
90 Literal li3 =
new Literal();
91 Literal li4 =
new Literal();
92 Literal li5 =
new Literal();
93
94 string table1 =
"<table style='width:360px;height:120px;text-align:center;display:inline-block;margin-bottom:50px'> <tr><td rowspan='3' style='height:120px'>";
95 string table2 =
"</td><td style='height:15px;width:200px'>";
96 string table3 =
" </td></tr><tr><td style='height=15px;width:200px'>";
97 string table4 =
"</td></tr> <tr><td style='width:200px;height:100px'>";
98 string table5 =
"</td></tr> </table>";
99
100 li1.Text =
table1;
101 li2.Text =
table2;
102 li3.Text =
table3;
103 li4.Text =
table4;
104 li5.Text =
table5;
105
106 container.Controls.Add(li1);
107 container.Controls.Add(img);
108 container.Controls.Add(li2);
109 container.Controls.Add(txt_title);
110 container.Controls.Add(li3);
111 container.Controls.Add(txt_tags);
112 container.Controls.Add(li4);
113 container.Controls.Add(txt_content);
114 container.Controls.Add(li5);
115 i++
;
116 if (i %
2 ==
0)
//控制每行显示几个图片
117 {
118 Literal li6 =
new Literal();
119 li6.Text =
"<br />";
120 container.Controls.Add(li6);
121 }
122 }
123 Session[
"num"] =
i.ToString();
124 }
125
126 //listbox 删除内容
127 protected void delete_Click(
object sender, EventArgs e)
128 {
129 if (ListBox1.SelectedIndex <
0)
130 Response.Write(
"请选择要删除的选项");
131 else
132 ListBox1.Items.Remove(ListBox1.SelectedItem);
133 }
134
135 protected void btn_upLoad_Click(
object sender, EventArgs e)
136 {
137 int i =
int.Parse(Session[
"num"].ToString());
138 //dropdownlist控件显示相册名，这里省略具体实现细节
139 string album_name=
ddl_show_album.SelectedValue;
140 object obj = oneUsr.get_value_by_album_name(album_name, Session[
"user"].ToString());
141
142 string album_id =
obj.ToString();
143 //捕捉页面动态加载的控件，这也是上文为各个控件添加有序ID的原因了
144 for (
int j =
0; j <= i -
1; j++
)
145 {
146 DateTime time =
DateTime.Now;
147
148 string url = (container.FindControl(
"img" + j)
as Image).ImageUrl;
149
150 string txt_title = (container.FindControl(
"txt_title" + j)
as TextBox).Text;
151
152 string txt_tags = (container.FindControl(
"txt_tags" + j)
as TextBox).Text;
153
154 string txt_content = (container.FindControl(
"txt_content" + j)
as TextBox).Text;
155 //数据库插入操作
156 oneUsr.pic_insert(url, time, txt_tags, txt_content, txt_title, album_id, url);
157 }
158 Response.Write(
"<script>alert('上传成功')</script>");
159 }
160 }
转载于:https://www.cnblogs.com/dominix/archive/2012/10/28/2743954.html
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