ASP.NET保存图片到sql2008
//将图片转行为二进制的方式,存储到数据库 string name = FileUpload1.PostedFile.FileName; string type = name.Substring(name.LastIndexOf(".") + 1); FileStream fs = File.OpenRead(name); byte[] content = new byte[fs.Length]; fs.Read(content, 0, content.Length); fs.Close(); //操作SQL数据库存储,请结合自己的软件 SqlConnection conn = new SqlConnection("Data Source=;Initial Catalog=;Persist Security Info=True;User ID=;Pooling=False;Password="); SqlCommand cmd = conn.CreateCommand(); conn.Open(); cmd.CommandText = "insert into Images(Image_Content) values (@content)"; cmd.CommandType = CommandType.Text; if (type == "jpg" || type == "gif" || type == "bmp" || type == "png") { SqlParameter para = cmd.Parameters.Add("@content", SqlDbType.Image); para.Value = content; cmd.ExecuteNonQuery(); } //读取数据库字段,并展示图片 string imgid = Request.QueryString["imgid"]; SqlConnection conn1 = new SqlConnection("Data Source=;Initial Catalog=;Persist Security Info=True;User ID=sa;Pooling=False;Password="); SqlCommand cmd1 = new SqlCommand("select Image_Content from Images where Image_ID=3", conn1); //固定显示Image_ID为3的图片 conn1.Open(); SqlDataReader sdr = cmd1.ExecuteReader(); if (sdr.Read()) { Response.BinaryWrite((byte[])sdr["Image_Content"]); } Response.End();
using System; using System.Web; using System.IO; using System.Data; using System.Data.SqlClient; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; namespace UploadImage { public class UploadImage : Page { protected HtmlInputFile UP_FILE; //HtmlControl、WebControls控件对象 protected TextBox txtDescription; protected Label txtMessage; protected Int32 FileLength = 0; //记录文件长度变量 protected void Button_Submit(System.Object sender, System.EventArgs e) { HttpPostedFile UpFile = UP_FILE.PostedFile; //HttpPostedFile对象,用于读取图象文件属性 FileLength = UpFile.ContentLength; //记录文件长度 try { if (FileLength == 0) { //文件长度为零时 txtMessage.Text = "< b>请你选择你要上传的文件< /b>"; } else { Byte[] FileByteArray = new Byte[FileLength]; //图象文件临时储存Byte数组 Stream StreamObject = UpFile.InputStream; //建立数据流对像。读取图象文件数据,FileByteArray为数据储存体,0为数据指针位置、FileLnegth为数据长度 StreamObject.Read(FileByteArray,0,FileLength); //建立SQL Server链接 SqlConnection Con = new SqlConnection("Data Source=Localhost;Initial Catalog=testdb;User ID=sa;Pwd=;"); String SqlCmd = "INSERT INTO ImageStore (ImageData, ImageContentType, ImageDescription, ImageSize) VALUES (@Image, @ContentType, @ImageDescription, @ImageSize)"; SqlCommand CmdObj = new SqlCommand(SqlCmd, Con); CmdObj.Parameters.Add("@Image",SqlDbType.Binary, FileLength).Value = FileByteArray; CmdObj.Parameters.Add("@ContentType", SqlDbType.VarChar,50).Value = UpFile.ContentType; //记录文件类型 //把其它单表数据记录上传 CmdObj.Parameters.Add("@ImageDescription", SqlDbType.VarChar,200).Value = txtDescription.Text; //记录文件长度,读取时使用 CmdObj.Parameters.Add("@ImageSize", SqlDbType.BigInt,8).Value = UpFile.ContentLength; Con.Open(); CmdObj.ExecuteNonQuery(); Con.Close(); txtMessage.Text = "< p>< b>OK!你已经成功上传你的图片< /b>";//提示上传成功 } } catch (Exception ex) { txtMessage.Text = ex.Message.ToString(); }}}}
ReadImage.cs程序内容如下: using System; using System.Data; using System.Data.SqlClient; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; namespace ReadImage { public class MainDisplay : System.Web.UI.Page { public void Page_Load(System.Object sender, System.EventArgs e) { int ImgID = Convert.ToInt32(Request.QueryString["ImgID"]); //ImgID为图片ID //建立数据库链接 SqlConnection Con = new SqlConnection("Data Source=KING;Initial Catalog=testdb;User ID=sa;Pwd=;"); String SqlCmd = "SELECT * FROM ImageStore WHERE ImageID = @ImageID"; SqlCommand CmdObj = new SqlCommand(SqlCmd, Con); CmdObj.Parameters.Add("@ImageID", SqlDbType.Int).Value = ImgID; Con.Open(); SqlDataReader SqlReader = CmdObj.ExecuteReader(); SqlReader.Read(); Response.ContentType = (string)SqlReader["ImageContentType"];//设定输出文件类型 //输出图象文件二进制数制 Response.OutputStream.Write((byte[])SqlReader["ImageData"], 0, (int)SqlReader["ImageSize"]); Response.End(); Con.Close(); //很简单吧^_^ } } }
ShowImage.hml < html> < body> 这个是从数据库读取出来的图象:< img src="ReadImage.aspx?ImgID=1"> < body> < /html>