此問題經常被人問，本文列出將文字和圖片上傳到數據庫的方法。包括Access數據庫和SQL Server數據庫。
Access數據庫代碼
<![CDATA[<%@ Page Language="C#" EnableViewState="true" %>
<%@ 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 = "請選擇文件。";
return;
}
//得到文件大小
int fileLength = FileUpload1.PostedFile.ContentLength;
//創建數組
byte[] fileData = new byte[fileLength];
//把文件流填充到數組
fileDataStream.Read(fileData, 0, fileLength);
//得到文件類型
string fileType = FileUpload1.PostedFile.ContentType;
//構建數據庫連接，SQL語句，創建參數
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 (@PersonName,@PersonEmail,@PersonSex,@PersonImageType,@PersonImage)", myConnection);
command.Parameters.AddWithValue("@PersonName",TextBox1.Text);
command.Parameters.AddWithValue("@PersonEmail", "mengxianhui@dotnet.aspx.cc");
command.Parameters.AddWithValue("@paramPersonSex", "男");
command.Parameters.AddWithValue("@PersonImageType", fileType);
command.Parameters.AddWithValue("@PersonImage", fileData);
//打開連接，執行查詢
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("提取數據時出現錯誤：" + 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>上傳文件到數據庫</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="上傳" OnClick="Button1_Click"></asp:Button>
<p>
<asp:Label ID="Msg" runat="server" ForeColor="Red"></asp:Label></p>
</form>
</body>
</html>
]]>
SQL Server數據庫代碼
<![CDATA[<%@ Page Language="C#" EnableViewState="true" %>
<%@ 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 = "請選擇文件。";
return;
}
//得到文件大小
int fileLength = FileUpload1.PostedFile.ContentLength;
//創建數組
byte[] fileData = new byte[fileLength];
//把文件流填充到數組
fileDataStream.Read(fileData, 0, fileLength);
//得到文件類型
string fileType = FileUpload1.PostedFile.ContentType;
//構建數據庫連接，SQL語句，創建參數
SqlConnection myConnection = new SqlConnection(strCnn);
SqlCommand command = new SqlCommand("INSERT INTO UserPhoto (UserName,ContentType,Photo)" +
"VALUES (@UserName,@ContentType,@Photo)", myConnection);
command.Parameters.AddWithValue("@UserName", TextBox1.Text);
command.Parameters.AddWithValue("@ContentType", fileType);
command.Parameters.AddWithValue("@Photo", fileData);
//打開連接，執行查詢
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("提取數據時出現錯誤：" + 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>上傳文件到數據庫</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="上傳" OnClick="Button1_Click"></asp:Button>
<p>
<asp:Label ID="Msg" runat="server" ForeColor="Red"></asp:Label></p>
</form>
</body>
</html>
]]>
顯示圖片
<![CDATA[<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data.OleDb" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<script runat="server">
protected void Page_Load( object sender, EventArgs e )
{
////構建數據庫連接，SQL語句，創建參數
//ACCESS數據庫使用本注釋部分
//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();
//構建數據庫連接，SQL語句，創建參數
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>
]]>
創建SQL數據表語句
<![CDATA[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
]]>