复制代码 代码如下:
<%@ Page Language="C#" ResponseEncoding="gb2312" %>
<%@ Import Namespace="System" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Drawing" %>
<%@ Import Namespace="System.Drawing.Imaging" %>
<script runat="server">
 
void Page_Load(Object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
ImgPreview.Visible = false;
}
}
void GetThumbnailImage(int width, int height, string strInfo, int left, int right)
{
string file = "Uploads/" + uploadFile.PostedFile.FileName.Substring(uploadFile.PostedFile.FileName.LastIndexOf('\\') + 1);
string newfile = "Uploads/" + uploadFile.PostedFile.FileName.Substring(uploadFile.PostedFile.FileName.LastIndexOf('\\') + 1) + ".jpg";
string strAdd = strInfo;
System.Drawing.Image oldimage = System.Drawing.Image.FromFile(Server.MapPath(file));
System.Drawing.Image thumbnailImage =
oldimage.GetThumbnailImage(width, height, new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero);
Response.Clear();
Bitmap output = new Bitmap(thumbnailImage);
Graphics g = Graphics.FromImage(output);
g.DrawString(strAdd, new Font("Courier New", 14), new SolidBrush(Color.Red), left, right);
output.Save(Server.MapPath(newfile), System.Drawing.Imaging.ImageFormat.Jpeg);
Response.ContentType = "image/gif";
ImgPreview.Visible = true;
ImgPreview.ImageUrl = newfile;
}
bool ThumbnailCallback()
{
return true;
}
void Button_Click(object sender, EventArgs e)
{
int width, height, left, right;
string strAddInfo = txtAddInfo.Text;
width = Int32.Parse(txtWidth.Text);
height = Int32.Parse(txtHeight.Text);
left = Int32.Parse(txtLeft.Text);
right = Int32.Parse(txtRight.Text);
if (!(uploadFile.PostedFile.ContentLength > 0))
{
lblErrInfo.Text = "没有选择文件";
}
else
{
string path = Server.MapPath("./Uploads/" + uploadFile.PostedFile.FileName.Substring(uploadFile.PostedFile.FileName.LastIndexOf('\\') + 1));
if (File.Exists(path))
{
lblErrInfo.Text = "已经有同名文件";
}
else
{
uploadFile.PostedFile.SaveAs(path);
GetThumbnailImage(width, height, strAddInfo, left, right);
}
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>上传图片并生成缩略图</title>
</head>
<body>
<form id="Form1" method="post" enctype="multipart/form-data" runat="server">
<p>
<input id="uploadFile" type="file" runat="server" />
<asp:Label ID="lblErrInfo" runat="server" ForeColor="Red"></asp:Label>
</p>
<p>
width:<asp:TextBox ID="txtWidth" runat="server" Width="40px">100</asp:TextBox>
height:<asp:TextBox ID="txtHeight" runat="server" Width="40px">150</asp:TextBox>
</p>
<p>
添加信息:<asp:TextBox ID="txtAddInfo" runat="server"> AspxBoy.Com</asp:TextBox>
</p>
<p>
信息位置:left:<asp:TextBox ID="txtLeft" runat="server" Width="40px">10</asp:TextBox>
right:<asp:TextBox ID="txtRight" runat="server" Width="40px">135</asp:TextBox>
</p>
<p>
<input id="button" type="button" value="上传生成所略图" onserverclick="Button_Click" runat="server" />
</p>
<p>
<asp:Image ID="ImgPreview" runat="server"></asp:Image>
</p>
<!-- Insert content here -->
</form>
</body>
</html>

asp.net(vbscript)上传图片并同时生成缩略图:
复制代码 代码如下:
  <script language="VB" runat="server">
  Sub UploadFile(sender As Object, e As EventArgs)
  If FileUp.PostedFile.ContentLength = 0 Then
  FileInfo.Visible = False
  Exit Sub
  Else
  FileInfo.Visible = True
  FDisplay1.Visible = True
  End If
  FSize.Text ="上传文件大小"+ CStr(FileUp.PostedFile.ContentLength/1024)+"KB"
  FName.Text = "已上传文件名:"+FileUp.PostedFile.FileName+"<br>"+FName.Text
  "写入数据库
  on error resume next
  dim myconn as sqlconnection
  dim mycomm as sqlcommand
  dim sql as string
  dim id as integer
  Dim image,anewimage As System.Drawing.Image
  dim width,height,newwidth,newheight as integer
  Dim callb As System.Drawing.Image.GetThumbnailImageAbort
  myConn=New sqlconnection(ConfigurationSettings.AppSettings("数据库"))
  myconn.open()
  sql="insert into picture (姓名,班级,介绍,属性) values (""&request.cookies("dgxyl").values("dgxylname")&"",""&request.cookies("dgxyl").values("dgxylbj")&"",""&trim(request("TextBox1"))&"",""&request("r1")&"")"
  Mycomm=New sqlcommand(sql,myconn)
  mycomm.executenonquery()
  myconn.close()
  Dim myCommand As New SqlCommand("select top 1 id from picture order by id desc", myConn)
  myCommand.Connection.Open()
  Dim myReader As SqlDataReader=mycommand.executereader()
  if myReader.Read() then
  id=myReader("id")
  end if
  myconn.close()
  "保存图片
  FileUp.PostedFile.SaveAs( Server.MapPath("\classpic\")&cstr(id)&".jpg" )
  "生成缩略图
  image=System.Drawing.Image.FromFile(Server.MapPath("/classpic/"+cstr(id)+".jpg"))
  width=image.Width
  height=image.height
  if width>height then
  newwidth=250
  newheight=image.height/image.Width*newwidth
  else
  newheight=250
  newwidth=image.Width/image.height*newheight
  end if
  response.write("id="+cstr(id)+"width="+cstr(Width)+";height="+cstr(height)+" ")
  response.write("newwidth="+cstr(newwidth)+";newheight="+cstr(newheight)+"<br>")
  aNewImage=image.GetThumbnailImage(newwidth,newheight,callb,new System.IntPtr())
  aNewImage.Save(Server.MapPath("/smallpic/"+cstr(id)+".jpg"))
  image.Dispose()
  Dim FileSplit() As String = Split( FileUp.PostedFile.FileName, "\" )
  Dim FileName As String = FileSplit(FileSplit.Length-1)
  Dim Exts() As String = Split( FileName, "." )
  Dim Ext As String = LCase(Exts(Exts.Length-1))
  FDisplay.Text = "<A Target="_blank" HREF="/classpic/"&cstr(id)&".jpg"& "">查看上传文件</A>"
  FDisplay1.text="<a href="/picture/default.asp?bj="&cstr(request.cookies("dgxyl").values("dgxylbj"))&"">返回</a>"
  End Sub
  </script>
  <SCRIPT language=JavaScript>
  <!--
  var requestsubmitted=false;
  function guestbook_Validator(theForm)
  {
  //检查是否从新提交
  if (requestsubmitted==true){
  alert("你已经提交了留言,请等待服务器应答!");
  return(false);
  }
  requestsubmitted=true;
  return (true);
  }
  //-->
  </SCRIPT>
<Html>
  <Body BgColor=White>
  <H3 align="center">请正确填写下面各项</h3>
  <Hr></H3>
  <Div id="FileInfo" Visible="False" runat="server">
  <Asp:Label id="FSize" runat="server"/><br>
  <Asp:Label id="FName" runat="server"/><br>
  <Asp:Label id="FDisplay" runat="server"/>
  <Asp:Label id="FDisplay1" runat="server"/>
  </Div>
  <Form Enctype="multipart/form-data" onsubmit="return guestbook_Validator(this)" runat="server">
  上传文件
  <Input Type="File" id="FileUp" runat="server" size="20"><br>
  图片属性:<input type="radio" value="<%=request.cookies("dgxyl").values("dgxylbj")%>" name="R1" checked>本班<input type="radio" value="全  校" name="R1">全校(本班则只在本班显示,全校则在全校显示)<P>
  图片说明:<br>
  <asp:TextBox id="TextBox1" runat="server" Width="233px" Height="141px">
  </asp:TextBox>
  <asp:RequiredFieldValidator id="RequiredFieldValidator1" runat="server" ControlToValidate="TextBox1" ErrorMessage="请输入图片说明">
  </asp:RequiredFieldValidator><br>
  <Asp:button id="Upload" OnClick="UploadFile" Text="上传图片" runat="server"/>
  </form>
  <Hr>
  <p>注意:</p>
  <ol>
  <li><b>严禁上传污染环境的照片,否则账号将被删除!</b></li>
  <li><font color="#808000"><b>请详细填写照片说明,图片说明不详细将会被视为乱传图片,将会被删除!</b></font></li>
  </ol>
  </Body>
  </Html>
标签:
asp.net,上传图片,缩略图

免责声明:本站文章均来自网站采集或用户投稿,网站不提供任何软件下载或自行开发的软件! 如有用户或公司发现本站内容信息存在侵权行为,请邮件告知! 858582#qq.com
桃源资源网 Design By www.nqtax.com

RTX 5090要首发 性能要翻倍!三星展示GDDR7显存

三星在GTC上展示了专为下一代游戏GPU设计的GDDR7内存。

首次推出的GDDR7内存模块密度为16GB,每个模块容量为2GB。其速度预设为32 Gbps(PAM3),但也可以降至28 Gbps,以提高产量和初始阶段的整体性能和成本效益。

据三星表示,GDDR7内存的能效将提高20%,同时工作电压仅为1.1V,低于标准的1.2V。通过采用更新的封装材料和优化的电路设计,使得在高速运行时的发热量降低,GDDR7的热阻比GDDR6降低了70%。