中南集团中南建设网站,河北省住房和城乡建设厅网站首页,龙岗建设网站,企业网站设置在SQL SERVER中建立这样结构的一个表#xff1a;列名类型目的IDInteger主键IDIMGTITLEVarchar(50)图片的标题IMGTYPEVarchar(50)图片类型. ASP.NET要以辨认的类型IMGDATAImage用于存储二进制数据 using System;using System.Collections;using System.Configuration;using…在SQL SERVER中建立这样结构的一个表列名类型目的IDInteger主键IDIMGTITLEVarchar(50)图片的标题IMGTYPEVarchar(50)图片类型. ASP.NET要以辨认的类型IMGDATAImage用于存储二进制数据 using System;using System.Collections;using System.Configuration;using System.Data;using System.Linq;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Xml.Linq;using System.Drawing;using System.Drawing.Imaging;using System.Drawing.Drawing2D;using System.Data.SqlClient;using System.IO; public partial class ChangeImageSize : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { } private int width; private int height; private Bitmap newpic, savepic; private float k1, k2; /// summary /// 构造函数 /// /summary public ChangeImageSize() { } /// summary /// 传入一张图片并设定它的大小 /// /summary /// param nameTheImage传入的图片对象/param /// param nameTheWidth图片宽的范围/param /// param nameTheHeight图片长的范围/param /// param namepath保存的文件名和路径/param public Bitmap ChangePicMethod(object TheImage, int TheWidth, int TheHeight) { newpic new Bitmap((System.Drawing.Image)TheImage); this.width newpic.Width; this.height newpic.Height; k1 (float)width / (float)TheWidth; k2 (float)height / (float)TheHeight; if (k1 k2) { this.width (int)(width / k1); this.height (int)(height / k1); } else { this.width (int)(width / k2); this.height (int)(height / k2); } savepic new Bitmap(newpic, width, height); return savepic; //savepic.Save(path); } /// summary /// 保存图片到数据库 /// /summary /// returns/returns private bool StoreImage() { bool rs false; Stream imgdatastream this.FileUpload1.PostedFile.InputStream; int imgdatalen this.FileUpload1.PostedFile.ContentLength; string imgtype this.FileUpload1.PostedFile.ContentType; string imgtitle FileUpload1.PostedFile.FileName; // byte[] imgdata new byte[imgdatalen]; //int n imgdatastream.Read(imgdata, 0, imgdatalen); //Bitmap bp ChangePicToSaveMethod(imgdatastream, 200, 200); MemoryStream ms new MemoryStream(); Bitmap bp new Bitmap(imgdatastream); bp ChangePicMethod(bp, 200, 200); //bpbp.GetThumbnailImage(200,200,new System.Drawing.Image.GetThumbnailImageAbort(aa()) ,System.IntPtr.Zero); bp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); ms.Flush(); byte[] imgdata ms.GetBuffer(); ms.Close(); SqlConnection connection Connection.getConnection(); SqlCommand command new SqlCommand(INSERT INTO ImageStore(ImageTitle,ImageType,ImageData)VALUES ( imgtitle, imgtype,imgdata ), connection); SqlParameter paramTitle new SqlParameter(imgtitle, SqlDbType.VarChar, 50); paramTitle.Value imgtitle; command.Parameters.Add(paramTitle); SqlParameter paramData new SqlParameter(imgdata, SqlDbType.Image); paramData.Value imgdata; command.Parameters.Add(paramData); SqlParameter paramType new SqlParameter(imgtype, SqlDbType.VarChar, 50); paramType.Value imgtype; command.Parameters.Add(paramType); connection.Open(); int numRowsAffected command.ExecuteNonQuery(); connection.Close(); rs true; return rs; } /// summary /// 从数据库取出图片 /// /summary /// param namesender/param /// param namee/param private void GetImage(string imgid) { string sql SELECT ImageData, ImageType FROM ImageStore WHERE ID imgid; SqlConnection connection Connection.getConnection(); SqlCommand command new SqlCommand(sql, connection); connection.Open(); SqlDataReader dr command.ExecuteReader(); if (dr.Read()) { Response.ContentType dr[ImageType].ToString(); Response.BinaryWrite((byte[])dr[ImageData]); } connection.Close(); } }转载于:https://www.cnblogs.com/carekee/articles/2083425.html
