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ASP.NET2.0中将文件上传到数据库

此问题经常被人问,本文列出将文字和图片上传到数据库的方法。包括Access数据库和SQL Server数据库。

Access数据库代码

<%&#64; Page Language="C#" EnableViewState="true" %> <%&#64; Import Namespace="System.Data.OleDb" %> <!doctype html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> protected void Button1_Click( object sender, EventArgs e ) { System.IO.Stream fileDataStream = FileUpload1.PostedFile.InputStream; if (fileDataStream.Length < 1) { Msg.Text = "请选择文件。"; return; } //得到文件大小 int fileLength = FileUpload1.PostedFile.ContentLength; //创建数组 byte[] fileData = new byte[fileLength]; //把文件流填充到数组 fileDataStream.Read(fileData, 0, fileLength); //得到文件类型 string fileType = FileUpload1.PostedFile.ContentType; //构建数据库连接,SQL语句,创建参数 string strCnn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("Image2Access.mdb"); OleDbConnection myConnection = new OleDbConnection(strCnn); OleDbCommand command = new OleDbCommand("INSERT INTO Person (PersonName,PersonEmail,PersonSex,PersonImageType,PersonImage)" + "VALUES (&#64;PersonName,&#64;PersonEmail,&#64;PersonSex,&#64;PersonImageType,&#64;PersonImage)", myConnection); command.Parameters.AddWithValue("&#64;PersonName",TextBox1.Text); command.Parameters.AddWithValue("&#64;PersonEmail", "mengxianhui&#64;dotnet.aspx.cc"); command.Parameters.AddWithValue("&#64;paramPersonSex", "男"); command.Parameters.AddWithValue("&#64;PersonImageType", fileType); command.Parameters.AddWithValue("&#64;PersonImage", fileData); //打开连接,执行查询 myConnection.Open(); command.ExecuteNonQuery(); myConnection.Close(); Response.Redirect(Request.RawUrl); } protected void Page_Load( object sender, EventArgs e ) { if (!Page.IsPostBack) { BindGrid(); } } private void BindGrid( ) { string strCnn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("Image2Access.mdb"); OleDbConnection myConnection = new OleDbConnection(strCnn); OleDbCommand myCommand = new OleDbCommand("SELECT * FROM Person", myConnection); try { myConnection.Open(); GridView1.DataSource = myCommand.ExecuteReader(System.Data.CommandBehavior.CloseConnection); GridView1.DataBind(); } catch (OleDbException SQLexc) { Response.Write("提取数据时出现错误:" + SQLexc.ToString()); } } protected string FormatURL( object strArgument ) { return "ReadImage.aspx?id=" + strArgument.ToString(); } </script> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>上传文件到数据库</title> </head> <body> <form id="MengXianhui" runat="server"> <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false"> <columns> <asp:TemplateField> <itemtemplate> <%#Eval("PersonName") %> </itemtemplate> </asp:TemplateField> <asp:TemplateField> <itemtemplate> <%#Eval("PersonEmail") %> </itemtemplate> </asp:TemplateField> <asp:TemplateField> <itemtemplate> <%#Eval("PersonSex") %> </itemtemplate> </asp:TemplateField> <asp:TemplateField> <itemtemplate> <img src="<%#FormatURL(Eval("PersonID")) % alt="" />" /></itemtemplate> </asp:TemplateField> </columns> </asp:GridView> <br /> <br /> 姓名:<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <br /> 照片:<asp:FileUpload ID="FileUpload1" runat="server" /> <asp:Button ID="btnUpload" runat="server" Text="上传" OnClick="Button1_Click"></asp:Button> <p> <asp:Label ID="Msg" runat="server" ForeColor="Red"></asp:Label></p> </form> </body> </html>

 

SQL Server数据库代码

<%&#64; Page Language="C#" EnableViewState="true" %> <%&#64; Import Namespace="System.Data.SqlClient" %> <!doctype html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> string strCnn = "Persist Security Info=False;User ID=sa;Password=;Initial Catalog=Book;Server=(local);"; protected void Button1_Click( object sender, EventArgs e ) { System.IO.Stream fileDataStream = FileUpload1.PostedFile.InputStream; if (fileDataStream.Length < 1) { Msg.Text = "请选择文件。"; return; } //得到文件大小 int fileLength = FileUpload1.PostedFile.ContentLength; //创建数组 byte[] fileData = new byte[fileLength]; //把文件流填充到数组 fileDataStream.Read(fileData, 0, fileLength); //得到文件类型 string fileType = FileUpload1.PostedFile.ContentType; //构建数据库连接,SQL语句,创建参数 SqlConnection myConnection = new SqlConnection(strCnn); SqlCommand command = new SqlCommand("INSERT INTO UserPhoto (UserName,ContentType,Photo)" + "VALUES (&#64;UserName,&#64;ContentType,&#64;Photo)", myConnection); command.Parameters.AddWithValue("&#64;UserName", TextBox1.Text); command.Parameters.AddWithValue("&#64;ContentType", fileType); command.Parameters.AddWithValue("&#64;Photo", fileData); //打开连接,执行查询 myConnection.Open(); command.ExecuteNonQuery(); myConnection.Close(); Response.Redirect(Request.RawUrl); } protected void Page_Load( object sender, EventArgs e ) { if (!Page.IsPostBack) { BindGrid(); } } private void BindGrid( ) { SqlConnection myConnection = new SqlConnection(strCnn); SqlCommand myCommand = new SqlCommand("SELECT * FROM UserPhoto Order By id DESC", myConnection); try { myConnection.Open(); GridView1.DataSource = myCommand.ExecuteReader(System.Data.CommandBehavior.CloseConnection); GridView1.DataBind(); } catch (Exception SQLexc) { Response.Write("提取数据时出现错误:" + SQLexc.ToString()); } } protected string FormatURL( object strArgument ) { return "ReadImage.aspx?id=" + strArgument.ToString(); } </script> <html xmlns="http://www.w3.org/1999/xhtml"> <head id="Head1" runat="server"> <title>上传文件到数据库</title> </head> <body> <form id="MengXianhui" runat="server"> <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false"> <columns> <asp:TemplateField> <itemtemplate> <%#Eval("UserName") %> </itemtemplate> </asp:TemplateField> <asp:TemplateField> <itemtemplate> <img src="<%#FormatURL(Eval("id")) % alt="" />" /></itemtemplate> </asp:TemplateField> </columns> </asp:GridView> <br /> <br /> 姓名:<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <br /> 照片:<asp:FileUpload ID="FileUpload1" runat="server" /> <asp:Button ID="btnUpload" runat="server" Text="上传" OnClick="Button1_Click"></asp:Button> <p> <asp:Label ID="Msg" runat="server" ForeColor="Red"></asp:Label></p> </form> </body> </html>

 

显示图片

<%&#64; Page Language="C#" %> <%&#64; Import Namespace="System.Data.OleDb" %> <%&#64; Import Namespace="System.Data.SqlClient" %> <script runat="server"> protected void Page_Load( object sender, EventArgs e ) { ////构建数据库连接,SQL语句,创建参数 //ACCESS数据库使用本注释部分 //string strCnn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("Image2Access.mdb"); //OleDbConnection myConnection = new OleDbConnection(strCnn); //OleDbCommand command = new OleDbCommand("select * from Person Where PersonID =" + Request.QueryString["id"], myConnection); //myConnection.Open(); //OleDbDataReader dr = command.ExecuteReader(); //if (dr.Read()) //{ // Response.Clear(); // Response.AddHeader("Content-Type", dr["PersonImageType"].ToString()); // Response.BinaryWrite((byte[])dr["PersonImage"]); //} //dr.Close(); //myConnection.Dispose(); //构建数据库连接,SQL语句,创建参数 string strCnn = "Persist Security Info=False;User ID=sa;Password=;Initial Catalog=Book;Server=(local);"; SqlConnection myConnection = new SqlConnection(strCnn); SqlCommand command = new SqlCommand("select * from UserPhoto Where id =" + Request.QueryString["id"], myConnection); myConnection.Open(); SqlDataReader dr = command.ExecuteReader(); if (dr.Read()) { Response.Clear(); Response.AddHeader("Content-Type", dr["ContentType"].ToString()); Response.BinaryWrite((byte[])dr["Photo"]); } dr.Close(); myConnection.Dispose(); } </script>

 

创建SQL数据表语句

CREATE TABLE [UserPhoto] ( [id] [int] IDENTITY (1, 1) NOT NULL , [UserName] [nvarchar] (255) COLLATE Chinese_PRC_CI_AS NOT NULL , [ContentType] [varchar] (50) COLLATE Chinese_PRC_CI_AS NOT NULL , [Photo] [image] NOT NULL , CONSTRAINT [PK_UserPhoto] PRIMARY KEY CLUSTERED ( [id] ) ON [PRIMARY] ) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY] GO

posted on 2008-02-05 08:54 liaojiyong 阅读(1153) 评论(0)  编辑  收藏 所属分类: Dot Net


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