本文總結如何在Net Winform和Net webform()中將圖片存入sqlserver中並讀取顯示的方法
使用將圖片上傳並存入SqlServer中然後從SqlServer中讀取並顯示出來
一上傳並存入SqlServer
數據庫結構
create table test
{
id identity()
FImage image
}
相關的存儲過程
Create proc UpdateImage
(
@UpdateImage Image
)
As
Insert Into test(FImage) values(@UpdateImage)
GO
在UpPhotoaspx文件中添加如下:
<input id=UpPhoto name=UpPhoto runat=server type=file>
<asp:Button id=btnAdd name=btnAdd runat=server Text=上傳></asp:Button>
然後在後置代碼文件UpPhotoaspxcs添加btnAdd按鈕的單擊事件處理代碼:
private void btnAdd_Click(object sender SystemEventArgs e)
{
//獲得圖象並把圖象轉換為byte[]
HttpPostedFile upPhoto=UpPhotoPostedFile;
int upPhotoLength=upPhotoContentLength;
byte[] PhotoArray=new Byte[upPhotoLength];
Stream PhotoStream=upPhotoInputStream;
PhotoStreamRead(PhotoArrayupPhotoLength);
//連接數據庫
SqlConnection conn=new SqlConnection();
connConnectionString=Data Source=localhost;Database=test;User Id=sa;Pwd=sa;
SqlCommand cmd=new SqlCommand(UpdateImageconn);
cmdCommandType=CommandTypeStoredProcedure;
cmdParametersAdd(@UpdateImageSqlDbTypeImage);
cmdParameters[@UpdateImage]Value=PhotoArray;
//如果你希望不使用存儲過程來添加圖片把上面四句代碼改為
//string strSql=Insert into test(FImage) values(@FImage);
//SqlCommand cmd=new SqlCommand(strSqlconn);
//cmdParametersAdd(@FImageSqlDbTypeImage);
//cmdParameters[@FImage]Value=PhotoArray;
connOpen();
cmdExecuteNonQuery();
connClose();
}
二從SqlServer中讀取並顯示出來
在需要顯示圖片的地方添加如下代碼:
<asp:image id=imgPhoto runat=server ImageUrl=ShowPhotoaspx></asp:image>
ShowPhotoaspx主體代碼
private void Page_Load(object sender SystemEventArgs e)
{
if(!PageIsPostBack)
{
SqlConnection conn=new SqlConnection()
connConnectionString=Data Source=localhost;Database=test;User Id=sa;Pwd=sa;
string strSql=select * from test where id=;//這裡假設獲取id為的圖片
SqlCommand cmd=new SqlCommand()
readerRead();
ResponseContentType=application/octetstream;
ResponseBinaryWrite((Byte[])reader[FImage]);
ResponseEnd();
readerClose();
}
}
在winform中將圖片存入sqlserver並從sqlserver中讀取並顯示在picturebox中
存入sqlserver
數據庫結構和使用的存儲過過程同上面的一樣
在窗體中加一個OpenFileDialog控件命名為ofdSelectPic
在窗體上添加一個打開文件按鈕添加如下單擊事件代碼
Stream ms;
byte[] picbyte;
//ofdSelectPicShowDialog();
if (ofdSelectPicShowDialog()==DialogResultOK)
{
if ((ms=ofdSelectPicOpenFile())!=null)
{
//MessageBoxShow(ok);
picbyte=new byte[msLength];
msPosition=;
msRead(picbyteConvertToInt(msLength));
//MessageBoxShow(讀取完畢!);
//連接數據庫
SqlConnection conn=new SqlConnection();
connConnectionString=Data Source=localhost;Database=test;User Id=sa;Pwd=sa;
SqlCommand cmd=new SqlCommand(UpdateImageconn);
cmdCommandType=CommandTypeStoredProcedure;
cmdParametersAdd(@UpdateImageSqlDbTypeImage);
cmdParameters[@UpdateImage]Value=picbyte;
connOpen();
cmdExecuteNonQuery();
connClose();
msClose();
}
}
讀取並顯示在picturebox中
添加一個picturebox名為ptbShow
添加一個按鈕添加如下響應事件
SqlConnection conn=new SqlConnection();
connConnectionString=Data Source=localhost;Database=test;User Id=sa;Pwd=sa;
string strSql=select FImage from test where id=;
SqlCommand cmd=new SqlCommand(strSqlconn);
connOpen();
SqlDataReader reader=cmdExecuteReader();
readerRead();
MemoryStream ms=new MemoryStream((byte[])reader[FImage]);
Image image=ImageFromStream(mstrue);
readerClose();
connClose();
ptbShowImage=image;
From:http://tw.wingwit.com/Article/program/net/201311/13722.html
