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图片上传代码示例

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using System; using System.IO; using System.Collections; using System.ComponentModel; using System.Data;

作者：中国IT实验室来源：中国IT实验室 2007年9月28日

关键字：代码编程

using System;

using System.IO;

using System.Collections;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Drawing.Imaging;

using System.Web;

using System.Web.SessionState;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

using KunslyNetDll.Common;

using HunMSM.include;

namespace HunMSM.photo

{

/// <summary>

/// 图片上传。

/// </summary>

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

{

public string sPath = "";

public string extension;

public string path;

public string fileName;

public string smobile;

protected void Page_Load(object sender, System.EventArgs e)

{

// 在此处放置用户代码以初始化页面

AddControl();

if (Session["UserMobile"] == null)

Response.Write("<script language=javascript>alert('请先登录，才允许上传图片');history.back(-1)</script>");

else

smobile = Session["UserMobile"].ToString().Trim();

if(!this.IsPostBack)

{

DropDownPhotoType();

DropDownPhotoColl();

}

void AddControl()

Web 窗体设计器生成的代码

protected void Button1_Click(object sender, System.EventArgs e)

{

int ncount = GetRecordCount();

if (ncount == 0)

{

KunslyWebPage.ShowMessage(this,"请先创建相册，才允许上传图片");

return;

}

// Response.Write("<script language=javascript>alert('请先创建相册，才允许上传图片');history.back(-1)</script>");

//else

//{

if(UploadFile.PostedFile.FileName.Trim() == "")

{

//Response.Write("<script language=javascript>alert('老大，没文件怎么传啊');history.back(-1)</script>");

KunslyWebPage.ShowMessage(this,"请选择文件");

return;

}

// else

// {

if (txtMessage.Text.Trim() == "")

{

KunslyWebPage.ShowMessage(this,"请输入简介");

return;

}

//Response.Write("<script language=javascript>alert('老大，请输入简介');history.back(-1)</script>");

extension = Path.GetExtension(UploadFile.PostedFile.FileName).ToUpper();

if (extension != ".JPG" && extension != ".GIF")

{

KunslyWebPage.ShowMessage(this,"非法文件，不允许上传,只允许上传.jpg或.gif文件");

return;

}

//Response.Write("<script language=javascript>alert('非法文件，不允许上传');history.back(-1)</script>");

if (UploadFile.PostedFile.ContentLength >= 1000000) //大于1M不允许上传

{

KunslyWebPage.ShowMessage(this,"文件过大,不能上传,单个文件最大不超过1M");

return;

}

fileName = DateTime.Now.ToString("yyyyMMddhhmmss");

path = Server.MapPath("") + "/upfile/" + fileName + extension;

updata();

}

void updata()#region void updata()

void updata()

{

//这个过程可以更新的数据库，把图片地址插入到数据库

UploadFile.PostedFile.SaveAs(path);

int width,height,newwidth=100,newheight;

System.Drawing.Image image1;

image1 = System.Drawing.Image.FromFile(path);

width=image1.Width;

height=image1.Height;

newheight=height*newwidth/width;

Bitmap bm = new Bitmap(image1,newwidth, newheight);

bm.Save(Server.MapPath("") + "/upfile/" + fileName + "_s" + extension, ImageFormat.Jpeg);

image1 = System.Drawing.Image.FromFile(path);

LblShowPhoto.Text = "照片已经成功上传，文件名为：" + fileName + extension + " 占用空间：";

LblShowPhoto.Text += UploadFile.PostedFile.ContentLength/1024 + "k";

string strtxtMessage = txtMessage.Text;

strtxtMessage = strtxtMessage.Replace("'","＇");

strtxtMessage = strtxtMessage.Replace(""","＂");

strtxtMessage = strtxtMessage.Replace(" ","<br>");

string strSql = "insert into photourl ";

strSql += "(PhotoUrl,PhotoUrl_s,PhotoWidth,PhotoHeight,PhotoSize,Puttime,PhotoIntro,";

strSql += "PhotoColl,Mobile,PhotoColl1)";

strSql += " values ";

strSql += "('"+fileName+extension+"','"+fileName + "_s" + extension+"',"+image1.Width+","+image1.Height;

strSql += ","+UploadFile.PostedFile.ContentLength+",getdate(),'"+strtxtMessage;

strSql += "',"+DdlPhotoType.SelectedValue.ToString().Trim()+",'"+smobile+"',";

strSql += DdlPhotoColl.SelectedValue.ToString().Trim()+")";

SqlConnection dbConn = DbConnection.GetSqlConn();

SqlCommand dbCmd = new SqlCommand(strSql, dbConn);

dbCmd.ExecuteNonQuery();

dbCmd.Dispose();

dbConn.Close();

image1.Dispose();

bm.Dispose();

}

#endregion

void DropDownPhotoType()

void DropDownPhotoColl()

int GetRecordCount()

}

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