技术文章 > 图片上传的Codebehind(自动生成所略图)

图片上传的Codebehind(自动生成所略图)

2017-12-12 04:37

文档管理软件,文档管理系统,知识管理系统,档案管理系统的技术资料:
[code]
csharp
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 description for fedata.
///

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("错误:文件(" + (i + 1) + ") " + imgNameOnly + " 已经存在,请修改文件名
");
}
}
else
{
erroNumber = erroNumber + 1;
if (fileExt == "")
picInfo.Append("错误:请选择文件
");
else
picInfo.Append("错误:文件(" + (i + 1) + ") " + imgNameOnly + " 扩展名 " + fileExt + " 不被许可
");
}
}
if (erroNumber > 0)
{
picInfo.Append("全部操作均未完成,请修改错误,再进行操作
");
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;
case ".gif":
oriImg.Save(strFePicSavePath + imgNameOnly, System.Drawing.Imaging.ImageFormat.Gif);
break;
case ".png":
oriImg.Save(strFePicSavePath + imgNameOnly, System.Drawing.Imaging.ImageFormat.Png);
break;
}
//oriImg.Save(ConfigurationSettings.AppSettings["FePicSavePath"] + imgNameNoExt + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);

switch (strFePicThumbFormat)
{
//jpeg format can get the smallest file size, and the png is the largest size
//case "jpeg":
case "jpg":
newImg.Save(strFePicSavePath + imgNameOnly + "_thumb.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
imgThumbnail = imgNameOnly + "_thumb.jpg";
break;
case "gif":
newImg.Save(strFePicSavePath + imgNameOnly + "_thumb.gif", System.Drawing.Imaging.ImageFormat.Gif);
imgThumbnail = imgNameOnly + "_thumb.gif";
break;
case "png":
newImg.Save(strFePicSavePath + imgNameOnly + "_thumb.png", System.Drawing.Imaging.ImageFormat.Png);
imgThumbnail = imgNameOnly + "_thumb.png";
break;
default:
newImg.Save(strFePicSavePath + imgNameOnly + "_thumb.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
imgThumbnail = imgNameOnly + "_thumb.jpg";
break;
}//switch
picInfo.Append("文件 名:" + imgNameOnly + " ( " + oriImg.Width + " x " + oriImg.Height + " ) " + PostedFile.ContentLength / 1024 + "KB
");
picInfo.Append("缩略图名:" + imgThumbnail + " ( " + newImg.Width + " x " + newImg.Height + " )

");
hlkOriPic.ImageUrl = strFePicWebPath + imgNameOnly;
hlkOriPic.ToolTip = "◆原图◆\n文件名:" + imgNameOnly + "\n尺寸:" + oriImg.Width + " x " + oriImg.Height + "\n字节:" + PostedFile.ContentLength / 1024 + "KB";
hlkNewPic.ImageUrl = strFePicWebPath + imgThumbnail;
hlkNewPic.ToolTip = "◆缩略图◆\n文件名:" + imgThumbnail + "\n尺寸:" + newImg.Width + " x " + newImg.Height;

oriImg.Dispose();
newImg.Dispose();
picInfo.Append("图片上传成功
");
if (admins.FePicDataSet(strPicTitle, strPicDate, imgNameOnly, intPicType, strPicIntro, imgThumbnail, 0) < 0)
picInfo.Append("保存信息到数据库失败
");
else
picInfo.Append("保存信息到数据库成功
");
}//for
picInfo.Append("所有操作成功
");
}// if erronumber = 0

}
else
{
picInfo.Append("有错误,请检查。操作未成功
");
hlkOriPic.ImageUrl = "";
hlkOriPic.ToolTip = "";
hlkNewPic.ImageUrl = "";
hlkNewPic.ToolTip = "";
}
for (int i = 0; i < Request.Files.Count; i++)
{
checkboxlistRewrite.Items[i].Selected = false;
}
lblPicInfo.Text = picInfo.ToString();
}
public void CalDateSelected(object sender, System.EventArgs e)
{
txtboxPicDate.Text = calPicDate.SelectedDate.ToShortDateString();
}
public void ServerValidateCheckDate(object sender, System.Web.UI.WebControls.ServerValidateEventArgs value)
{
cj168.util.iUtil iUtils = new cj168.util.iUtil();
if (!iUtils.IsDate(value.Value))
value.IsValid = false;
else
value.IsValid = true;
}

#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
///
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///

private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}
[/code]