.net文件上传(整理)

最新推荐文章于 2024-02-28 11:55:11 发布

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最新推荐文章于 2024-02-28 11:55:11 发布

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分类专栏： .NET 文章标签： .net server string asp image 服务器

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传输快慢和最大的传输大小和网速及服务器端的内存大小有很大的关系.建议服务器端内存加大.

<system.web>

</system.web>

第一个文件大小。第二个参数是超时时间。102400=100m

2
http://blog.youkuaiyun.com/Josion/archive/2006/12/04/1429465.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Login.aspx.cs" Inherits="Login" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<title>::::上传管理系统::::</title>

</head>

<body>

<br />

<asp:Label ID="LabelTitle" runat="server" Font-Bold="True" Font-Size="XX-Large" ForeColor="Black"

Text="上传管理"></asp:Label><br />

<br />

<asp:FileUpload ID="FileUpload1" runat="server" Width="369px"/>

 <asp:Button ID="ButtonUp" runat="server" Height="21px" Text="上传" Width="67px" OnClick="ButtonUp_Click" /><br />

<br />

<asp:Label ID="LabelTitle2" runat="server" ForeColor="Red" Text="*上传文件不能超过2M"></asp:Label><br />

<b>上传到服务器：</b><span id="SaveDir" runat="server" /><br />

<b>缩略图地址：</b><span id ="sSaveDir" runat ="server" /><br />

<b>文件拓展名：</b><span id="FileExtention" runat="server" /><br />

图片预览:<br />

<asp:Image ID="Image1" runat="server" ImageUrl="~/Login.aspx" BorderColor="#0000C0"/><br />

</b>

<br />

 </div>

</form>

</body>

</html>

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using MWO.Model.Info;

using MWO.DAL.Info;

public partial class Login : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

protected void ButtonUp_Click(object sender, EventArgs e)

{

if (FileUpload1.PostedFile.FileName != null)

{

try

{

FileName.InnerHtml = FileUpload1.PostedFile.FileName;//GetPhotoName

UpDateTime.InnerHtml = DateTime.Now.ToShortDateString();//UpDateTime

SetPhotoSize

}

catch (Exception m_Ex)

{

Response .Write ("<script>alert('"+m_Ex.ToString ()+"');</script>");

}

else if (FileUpload1.PostedFile.FileName == "")

{

Response.Write("<script>alert('上传文件不能为空！');</script>");

}

...

SaveSmallPhoto#region SaveSmallPhoto

/// <summary>

/// 高清晰缩略图算法

/// </summary>

/// <param name="postFile">图片文件对象</param>

/// <param name="saveImg">要保存为缩略图的源文件</param>

/// <param name="Width">宽度</param>

/// <param name="Height">高度</param>

public void MakeSmallImg(System.Web.HttpPostedFile postFile, string saveImg, System.Double Width, System.Double Height)

{

//SourcePhotoName

string m_OriginalFilename = postFile.FileName;

string m_strGoodFile = saveImg;

//GetPhotoObject From SourceFile

System.Drawing.Image m_Image = System.Drawing.Image.FromStream(postFile.InputStream, true);

System.Double NewWidth, NewHeight;

if (m_Image.Width > m_Image.Height)

{

NewWidth = Width;

NewHeight = m_Image.Height * (NewWidth / m_Image.Width);

}

else

{

NewHeight = Height;

NewWidth = (NewHeight / m_Image.Height) * m_Image.Width;

}

if (NewWidth > Width)

{

NewWidth = Width;

}

if (NewHeight > Height)

{

NewHeight = Height;

}

//GetPhotoSize

System.Drawing.Size size =new System.Drawing.Size((int)NewWidth, (int)NewHeight);

//The New of Bimp Photo

System.Drawing.Image bitmap = new System.Drawing.Bitmap(size.Width, size.Height);

// The New of Palette

System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);

// Set HightQuality Arithmetic For Graphics

g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;

//设置高质量,低速度呈现平滑程度

g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

//ClearCanvas

g.Clear(System.Drawing.Color.White);

//在指定位置画图

g.DrawImage(m_Image, new System.Drawing.Rectangle(0, 0, bitmap.Width, bitmap.Height),

new System.Drawing.Rectangle(0, 0, m_Image.Width, m_Image.Height),

System.Drawing.GraphicsUnit.Pixel);

//SavePhoto Of HightFocus

bitmap.Save(m_strGoodFile, System.Drawing.Imaging.ImageFormat.Jpeg);

//DisposeRes

g.Dispose();

m_Image.Dispose();

bitmap.Dispose();

}

#endregion

}