知识大全 ASP.NET2.0中将文件上传到数据库

Posted 2022-07-14 数据库

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　　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

　　<%@ Page Language= C# EnableViewState= true %>

　　<%@ Import Namespace= System Data OleDb %><!DOCTYPE PUBLIC //W C//DTD XHTML Transitional//EN transitional dtd >

　　protected void Button _Click( object sender EventArgs e ) System IO Stream fileDataStream = FileUpload PostedFile InputStream;

　　if (fileDataStream Length < ) Msg Text = 请选择文件 ; return;

　　//得到文件大小 int fileLength = FileUpload PostedFile ContentLength;

　　//创建数组 byte[] fileData = new byte[fileLength]; //把文件流填充到数组 fileDataStream Read(fileData fileLength); //得到文件类型 string fileType = FileUpload PostedFile ContentType;

　　//构建数据库连接 SQL语句创建参数 string strCnn = Provider=Microsoft Jet OLEDB ;Data Source= + Server MapPath( Image Access mdb ); OleDbConnection myConnection = new OleDbConnection(strCnn); OleDbCommand mand = new OleDbCommand( INSERT INTO Person (PersonName PersonEmail PersonSex PersonImageType PersonImage) + VALUES (@PersonName @PersonEmail @PersonSex @PersonImageType @PersonImage) myConnection);

　　mand Parameters AddWithValue( @PersonName TextBox Text); mand Parameters AddWithValue( @PersonEmail mengxia ); mand Parameters AddWithValue( @paramPersonSex 男 ); mand Parameters AddWithValue( @PersonImageType fileType); mand Parameters AddWithValue( @PersonImage fileData);

　　//打开连接执行查询 myConnection Open(); mand 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 ;Data Source= + Server MapPath( Image Access mdb ); OleDbConnection myConnection = new OleDbConnection(strCnn); OleDbCommand myCommand = new OleDbCommand( SELECT * FROM Person myConnection);

　　try myConnection Open(); GridView DataSource = myCommand ExecuteReader(System Data CommandBehavior CloseConnection); GridView 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>

　　< xmlns= ><head runat= server > <title>上传文件到数据库</title></head><body> <form id= MengXianhui runat= server > <asp:GridView ID= GridView 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 )) %> /></ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView> <br /> <br /> 姓名 <asp:TextBox ID= TextBox runat= server ></asp:TextBox> <br /> 照片 <asp:FileUpload ID= FileUpload runat= server /> <asp:Button ID= btnUpload runat= server Text= 上传 OnClick= Button _Click ></asp:Button> <p> <asp:Label ID= Msg runat= server ForeColor= Red ></asp:Label></p> </form></body></>

　　SQL Server数据库代码

　　<%@ Page Language= C# EnableViewState= true %>

　　<%@ Import Namespace= System Data SqlClient %><!DOCTYPE PUBLIC //W C//DTD XHTML Transitional//EN transitional dtd >

　　<script runat= server > string strCnn = Persist Security Info=False;User ID=sa;Password=;Initial Catalog=Book;Server=(local); ; protected void Button _Click( object sender EventArgs e ) System IO Stream fileDataStream = FileUpload PostedFile InputStream;

　　if (fileDataStream Length < ) Msg Text = 请选择文件 ; return;

　　//得到文件大小 int fileLength = FileUpload PostedFile ContentLength;

　　//构建数据库连接 SQL语句创建参数

　　SqlConnection myConnection = new SqlConnection(strCnn); SqlCommand mand = new SqlCommand( INSERT INTO UserPhoto (UserName ContentType Photo) + VALUES (@UserName @ContentType @Photo) myConnection);

　　mand Parameters AddWithValue( @UserName TextBox Text); mand Parameters AddWithValue( @ContentType fileType); mand Parameters AddWithValue( @Photo fileData);

　　//打开连接执行查询 myConnection Open(); mand 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(); GridView DataSource = myCommand ExecuteReader(System Data CommandBehavior CloseConnection); GridView 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>

　　< xmlns= ><head id= Head runat= server > <title>上传文件到数据库</title></head><body> <form id= MengXianhui runat= server > <asp:GridView ID= GridView runat= server AutoGenerateColumns= false > <Columns> <asp:TemplateField> <ItemTemplate> <%#Eval( UserName ) %> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <ItemTemplate> <img src= <%#FormatURL(Eval( id )) %> /></ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView> <br /> <br /> 姓名 <asp:TextBox ID= TextBox runat= server ></asp:TextBox> <br /> 照片 <asp:FileUpload ID= FileUpload runat= server /> <asp:Button ID= btnUpload runat= server Text= 上传 OnClick= Button _Click ></asp:Button> <p> <asp:Label ID= Msg runat= server ForeColor= Red ></asp:Label></p> </form></body></>

　　显示图片

　　<%@ Page Language= C# %>

　　<%@ Import Namespace= System Data OleDb %><%@ 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 ;Data Source= + Server MapPath( Image Access mdb ); //OleDbConnection myConnection = new OleDbConnection(strCnn); //OleDbCommand mand = new OleDbCommand( select * from Person Where PersonID = + Request QueryString[ id ] myConnection); //myConnection Open(); //OleDbDataReader dr = mand 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 mand = new SqlCommand( select * from UserPhoto Where id = + Request QueryString[ id ] myConnection); myConnection Open(); SqlDataReader dr = mand 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 ( ) NOT NULL [UserName] [nvarchar] ( ) COLLATE Chinese_PRC_CI_AS NOT NULL [ContentType] [varchar] ( ) 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

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