参考下这个吧:
http://expert.csdn.net/Expert/topic/1553/1553351.xml?temp=.6691553
http://expert.csdn.net/Expert/topic/1553/1553351.xml?temp=.6691553
解决方案 »
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功能:
1。把图片文件(JPG GIF PNG)上传,
2。保存到指定的路径(在web.config中设置路径,以文件的原有格式保存),
3。并自动生成指定宽度的(在web.config中设置宽度)
4。和指定格式的(在web.config中指定缩略图的格式,支持GIF,JPG,PNG)
5。和原图比例相同的缩略图(根据宽度和原图的宽和高计算所略图的高度)
6。可以判断是否已经存在文件
7。如果不覆盖,则给出错误
8。如果选中"覆盖原图"checkbox,则覆盖原图。
9。可以根据要求,在webform上设置1个以上的file input和相应的checkbox
10。并在文件上传完毕后,显示原图的文件名,尺寸,字节,和
11。缩略图的文件名尺寸,以及
12。显示原图和缩略图。
13。缩略图的文件名格式,以便与管理:
大图(原图): 图片分类代号_图片代表的日期_图片原有文件名.原有格式 (如:28_2002-1-28_test.jpg)
缩略图: 图片分类代号_图片代表的日期_图片原有文件名.原有格式_thumb.指定的缩略图格式 (如:28_2002-1-28_test.jpg_thumb.gif)----------------------
web.config文件中的相应设置:<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.web>
...
...
</system.web>
<appSettings>
...
...
...
...
//FePicSavePath 图片保存在服务器上的实际路径
<add key="FePicSavePath" value="d:/myroot/myapp/content/fepics/" />
//FePicWebPath 图片的网络路径,用于显示图片
<add key="FePicWebPath" value="http://www.mysite.com/fepics/" />
//FePicThumbWidth 缩略图的宽度
<add key="FePicThumbWidth" value="115" />
//所略图的格式
<add key="FePicThumbFormat" value="gif" />
</appSettings>
</configuration>
public int FePicDataSet(string strPicTitle, string strPicDate, string strPicName, int intPicType, string strPicIntro, string strThumbnail, int opID)
{//string strPicTitle,
//string strPicDate,
//string strPicName,
//int intPicType,
//string strPicIntro,
//string strPicName,
//string strThumbnail,
//int opID
SqlConnection myConnection = new SqlConnection(ConfigurationSettings.AppSettings["ConnectionString"]);
SqlCommand myCommand = new SqlCommand("mag_FePicDataSet", myConnection);
// Mark the Command as a SPROC
myCommand.CommandType = CommandType.StoredProcedure;// Add Parameters to SPROC
SqlParameter parameterUserId = new SqlParameter("@opID", SqlDbType.Int);
parameterUserId.Value = opID;
myCommand.Parameters.Add(parameterUserId);SqlParameter parameterPicTitle = new SqlParameter("@picTitle", SqlDbType.Char, 30);
parameterPicTitle.Value = strPicTitle;
myCommand.Parameters.Add(parameterPicTitle);SqlParameter parameterPicDate = new SqlParameter("@picDate", SqlDbType.Char, 10);
parameterPicDate.Value = strPicDate;
myCommand.Parameters.Add(parameterPicDate); SqlParameter parameterPicName = new SqlParameter("@picName", SqlDbType.Char, 50);
parameterPicName.Value = strPicName;
myCommand.Parameters.Add(parameterPicName); SqlParameter parameterPicType = new SqlParameter("@picType", SqlDbType.Int);
parameterPicType.Value = intPicType;
myCommand.Parameters.Add(parameterPicType); SqlParameter parameterPicIntro = new SqlParameter("@picIntro", SqlDbType.Char, 255);
parameterPicIntro.Value = strPicIntro;
myCommand.Parameters.Add(parameterPicIntro);SqlParameter parameterThumbnail = new SqlParameter("@thumbnail", SqlDbType.Char, 50);
parameterThumbnail.Value = strThumbnail;
myCommand.Parameters.Add(parameterThumbnail); SqlParameter parameterHostAddress = new SqlParameter("@opIP", SqlDbType.Char, 15);
parameterHostAddress.Value = Context.Request.UserHostAddress;
myCommand.Parameters.Add(parameterHostAddress); //SqlParameter parameterRID = new SqlParameter("@returnID", SqlDbType.Int);
//parameterReturnUserID.Value = -1;
//parameterRID.Direction = ParameterDirection.Output;
//myCommand.Parameters.Add(parameterRID);// Execute the command in a try/catch to catch duplicate username errors
try
{
// Open the connection and execute the Command
myConnection.Open();
myCommand.ExecuteNonQuery();
}
catch
{// failed to create a new user
return -1;
}
finally
{// Close the Connection
if (myConnection.State == ConnectionState.Open)
myConnection.Close();
}return 1;}
using System;
using System.Collections;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Text;
using cj168.util;
namespace cj168.Web.Mag.Admins.FeData
{
/// <summary>
/// Summary description for fedata.
/// </summary>
public class feUploadPic : System.Web.UI.Page
{
protected System.Web.UI.WebControls.TextBox txtboxPicTitle;
protected System.Web.UI.WebControls.Calendar calPicDate;
protected System.Web.UI.WebControls.DropDownList ddlPicType;
protected System.Web.UI.WebControls.TextBox txtboxPicIntro;
protected System.Web.UI.HtmlControls.HtmlInputFile filePicName;
protected System.Web.UI.WebControls.Button btnSubmit;
protected System.Web.UI.WebControls.Label lblPicInfo;
protected System.Web.UI.WebControls.TextBox txtboxPicDate;
protected System.Web.UI.WebControls.RequiredFieldValidator Requiredfieldvalidator1;
protected System.Web.UI.WebControls.RegularExpressionValidator vldCatName;
protected System.Web.UI.WebControls.RequiredFieldValidator Requiredfieldvalidator2;
protected System.Web.UI.WebControls.CustomValidator CustomValidator1;
protected System.Web.UI.WebControls.RegularExpressionValidator RegularExpressionValidator1;
protected System.Web.UI.WebControls.HyperLink hlkOriPic;
protected System.Web.UI.WebControls.HyperLink hlkNewPic;
protected System.Web.UI.WebControls.RegularExpressionValidator Regularexpressionvalidator2;
protected System.Web.UI.WebControls.RegularExpressionValidator Regularexpressionvalidator3;
protected System.Web.UI.WebControls.CheckBoxList checkboxlistRewrite;private void Page_Load(object sender, System.EventArgs e)
{
// Put user code to initialize the page here
//if(Page.IsPostBack)
//txtboxPicDate.Text = calPicDate.SelectedDate.ToString(); if(!Page.IsPostBack)
{
Bind2DropDownListPicType();//for(int i = 0;i < Request.Files.Count; i++)
//{
// checkboxlistRewrite.Items[i].Selected = false;
//}
}}public void Bind2DropDownListPicType()
{
cj168.DataAccess.Admins admins = new cj168.DataAccess.Admins();
DataSet ds = admins.FePicTypeGet();
//ddlPicType.DataSource = ;
DataView dv = new DataView(ds.Tables["PicType"]);DataRowView drv = dv.AddNew();
//DataColumnView dcv = dv.AddNew();
drv["Title"] = "请选择";
drv["fePicTypeID"] = "0";
drv.EndEdit();
dv.Sort = "fePicTypeID"; ddlPicType.DataSource = dv;ddlPicType.DataBind();
}public void UploadFile(object sender, System.EventArgs e)
{string imgNameOnly, imgNameNoExt, imgExt;
string imgThumbnail;
int erroNumber = 0;
System.Drawing.Image oriImg, newImg;
string strFePicSavePath = ConfigurationSettings.AppSettings["FePicSavePath"].ToString();
string strFePicThumbFormat = ConfigurationSettings.AppSettings["FePicThumbFormat"].ToString().ToLower();
int intFeThumbWidth = Int32.Parse(ConfigurationSettings.AppSettings["FePicThumbWidth"]);
string fileExt;
string strPicTitle = txtboxPicTitle.Text;
string strPicIntro = txtboxPicIntro.Text;
string strPicDate = txtboxPicDate.Text;int intPicType = Int32.Parse(ddlPicType.SelectedItem.Value);
string strPicType = intPicType.ToString() + "_" + DateTime.Now.Date.ToShortDateString() + "_";
string strFePicWebPath = ConfigurationSettings.AppSettings["FePicWebPath"];cj168.DataAccess.Admins admins = new cj168.DataAccess.Admins();//if(admins.FePicTypeSet(textboxTitle.Text,0) < 0)
// lblAddPicInfo.Text = "操作失败:已经存在相同名称类型,请修改";
//else
// lblAddPicInfo.Text = "操作成功";
StringBuilder picInfo = new StringBuilder();if(Page.IsValid)
{
for(int i = 0;i < Request.Files.Count; i++)
{
HttpPostedFile PostedFile = Request.Files[i];
fileExt = (System.IO.Path.GetExtension(PostedFile.FileName)).ToString().ToLower();
//5-test.jpg
imgNameOnly = strPicType + System.IO.Path.GetFileName(PostedFile.FileName);
if(fileExt == ".jpg" || fileExt == ".gif" || fileExt == ".png")
{if(System.IO.File.Exists(strFePicSavePath + imgNameOnly) && (checkboxlistRewrite.Items[i].Selected == false))
{
erroNumber = erroNumber + 1;
picInfo.Append("<b>错误:</b>文件("+ (i+1) +") " + imgNameOnly + " 已经存在,请修改文件名<br>" );
}
}
else
{
erroNumber = erroNumber + 1;
if(fileExt == "")
picInfo.Append("<b>错误:</b>请选择文件<br>" );
else
picInfo.Append("<b>错误:</b>文件("+ (i+1) +") " + imgNameOnly + " 扩展名 " + fileExt + " 不被许可<br>" );
} }if(erroNumber > 0)
{
picInfo.Append("<font color=red>全部操作均未完成,请修改错误,再进行操作</font><br>");hlkOriPic.ImageUrl = "";
hlkOriPic.ToolTip = "";
hlkNewPic.ImageUrl = "";
hlkNewPic.ToolTip = "";
}
else
{
for(int i = 0;i < Request.Files.Count; i++)
{HttpPostedFile PostedFile = Request.Files[i];
imgNameOnly = strPicType + System.IO.Path.GetFileName(PostedFile.FileName);
imgNameNoExt = System.IO.Path.GetFileNameWithoutExtension(PostedFile.FileName);
imgExt = System.IO.Path.GetExtension(PostedFile.FileName).ToString().ToLower();
oriImg = System.Drawing.Image.FromStream(PostedFile.InputStream);
newImg = oriImg.GetThumbnailImage(intFeThumbWidth, intFeThumbWidth * oriImg.Height/oriImg.Width,null,new System.IntPtr(0));
switch(imgExt)
{
//case ".jpeg":
case ".jpg":
oriImg.Save(strFePicSavePath + imgNameOnly , System.Drawing.Imaging.ImageFormat.Jpeg);
break;