取得文件后缀名,保存文件,加入文字水印代码,Asp.Net代码库,德仔网

代码语言
代码分类
【Asp.Net】取得文件后缀名,保存文件,加入文字水印
作者:Dezai.CN / 发布于2013/6/8/ 661
后缀名

	using System;
	using System.Data;
	using System.Configuration;
	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 System.Drawing;
	using System.IO;
	using System.Drawing.Imaging;

	namespace EC
	{
	/// <summary>
	/// 上传类
	/// </summary>
	public class UploadObj
	{

	public UploadObj()
	{
	//
	// TODO: 在此处添加构造函数逻辑
	//
	}
	/// <summary>
	/// 允许文件上传的类型枚举
	/// </summary>
	public enum FileType
	{
	jpg,gif,bmp,png
	}

	#region 取得文件后缀
	/// <summary>
	/// 取得文件后缀
	/// </summary>
	/// <param name="filename">文件名称</param>
	/// <returns></returns>
	public static string GetFileExtends(string filename)
	{
	string ext = null;
	if (filename.IndexOf('.') > 0)
	{
	string[] fs = filename.Split('.');
	ext = fs[fs.Length - 1];
	}
	return ext;
	}
	#endregion

	#region 检测文件是否合法
	/// <summary>
	/// 检测上传文件是否合法
	/// </summary>
	/// <param name="fileExtends">文件后缀名</param>
	/// <returns></returns>
	public static bool CheckFileExtends(string fileExtends)
	{
	bool status = false;
	fileExtends = fileExtends.ToLower();
	string[] fe = Enum.GetNames(typeof(FileType));
	for (int i = 0; i < fe.Length; i++)
	{
	if (fe[i].ToLower() == fileExtends)
	{
	status = true;
	break;
	}
	}
	return status;
	}
	#endregion

	#region 保存文件
	/// <summary>
	/// 保存文件
	/// </summary>
	/// <param name="fpath">全路径,Server.MapPath()</param>
	/// <param name="myFileUpload">上传控件</param>
	/// <returns></returns>
	public static string PhotoSave(string fpath,FileUpload myFileUpload)
	{
	string s = "";
	string fileExtends = "";
	string fileName = myFileUpload.FileName;
	if (fileName != "")
	{
	//取得文件后缀
	fileExtends = EC.UploadObj.GetFileExtends(fileName);
	if (!EC.UploadObj.CheckFileExtends(fileExtends))
	{
	EC.MessageObject.ShowPre("上传文件类型不合法");
	}
	Random rd = new Random();
	s = EC.RandomObject.DateRndName(rd) + "." + fileExtends;
	string file = fpath + "\\" + s;
	try
	{
	myFileUpload.SaveAs(file);
	}
	catch (Exception ee)
	{
	throw new Exception(ee.ToString());
	}
	}
	return s;
	}

	#endregion

	#region 加入文字水印

	/// <summary>
	/// 加入文字水印
	/// </summary>
	/// <param name="fileName">文件名称路径(全路径)</param>
	/// <param name="text">文件</param>
	public void AddTextToImg(string fileName, string text)
	{
	if (!File.Exists(fileName))
	{
	throw new FileNotFoundException("文件不存在");
	}
	if (text == string.Empty)
	{
	return;
	}
	//判断文件类型是否为图像类型

	System.Drawing.Image image = System.Drawing.Image.FromFile(fileName);
	Bitmap bitmap = new Bitmap(image, image.Width, image.Height);
	Graphics g = Graphics.FromImage(bitmap);
	float fontSize = 12.0f;//字体大小
	float textWidth = text.Length * fontSize;//文本的长度
	//下面定义一个矩形区域,以后在这个矩形里面画上白底黑字
	float rectX = 0;
	float rectY = 0;
	float rectWidth = text.Length * (fontSize + 8);
	float rectHeight = fontSize + 8;
	//声明矩形域
	RectangleF textArea = new RectangleF(rectX, rectY, rectWidth, rectHeight);
	Font font = new Font("宋体", fontSize);//定义字体
	Brush whiteBrush = new SolidBrush(Color.White);//白笔刷,画文字用
	Brush blackBrush = new SolidBrush(Color.Black);//黑笔刷，画背景用
	g.FillRectangle(blackBrush, rectX, rectY, rectWidth, rectHeight);
	g.DrawString(text, font, whiteBrush, textArea);
	MemoryStream ms = new MemoryStream();
	bitmap.Save(ms, ImageFormat.Jpeg);
	//输出处理后的图像，这里为了演示方便，我将图片显示在页面中了
	//Response.Clear();
	//Response.ContentType = "image/jpeg";
	//Response.BinaryWrite(ms.ToArray());
	g.Dispose();
	bitmap.Dispose();
	image.Dispose();
	}
	#endregion
	}
	}
试试其它关键字
　文件后缀名　
同语言下
可能有用的
Dezai.CN贡献的其它代码(4037)