private void button2_Click(object sender, EventArgs e)
{
OracleConnection conn = dbc.getConnection();//获得conn连接
try
{
conn.Open();
OracleCommand cmd = conn.CreateCommand();
cmd.CommandText = "SELECT zp FROM kk.kkbj WHERE xh = 2345 ";//查询获得图片流
OracleDataReader reader = cmd.ExecuteReader();//创建一个OracleDateReader对象
reader.Read();
MemoryStream ms = new MemoryStream((byte[])reader["zp"]);
Image image = Image.FromStream(ms, true);
reader.Close();
conn.Close();
pictureBox1.Image = image;
}
catch (Exception ee)
{
MessageBox.Show(ee.Message.ToString());
}
}
[color=red]----------下边是上传和存入数据库有asp.net和winform(转)----------------------------------[/color]
本文总结如何在.Net Winform和.Net webform(asp.net)中将图片存入sqlserver中并读取显示的方法
1，使用asp.net将图片上传并存入SqlServer中，然后从SqlServer中读取并显示出来
一，上传并存入SqlServer
数据库结构
create table test
{
id identity(1,1),
FImage image
}
相关的存储过程
Create proc UpdateImage
(
@UpdateImage Image
)
As
Insert Into test(FImage) values(@UpdateImage)
GO 在UpPhoto.aspx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="上传"></asp:Button>
然后在后置代码文件UpPhoto.aspx.cs添加btnAdd按钮的单击事件处理代码:
private void btnAdd_Click(object sender, System.EventArgs e)
{
//获得图象并把图象转换为byte[]
HttpPostedFile upPhoto=UpPhoto.PostedFile;
int upPhotoLength=upPhoto.ContentLength;
byte[] PhotoArray=new Byte[upPhotoLength];
Stream PhotoStream=upPhoto.InputStream;
PhotoStream.Read(PhotoArray,0,upPhotoLength);
//连接数据库
SqlConnection conn=new SqlConnection();
conn.ConnectionString="Data Source=localhost;Database=test;User Id=sa;Pwd=sa";
SqlCommand cmd=new SqlCommand("UpdateImage",conn);
cmd.CommandType=CommandType.StoredProcedure;
cmd.Parameters.Add("@UpdateImage",SqlDbType.Image);
cmd.Parameters["@UpdateImage"].Value=PhotoArray;
//如果你希望不使用存储过程来添加图片把上面四句代码改为：
//string strSql="Insert into test(FImage) values(@FImage)";
//SqlCommand cmd=new SqlCommand(strSql,conn);
//cmd.Parameters.Add("@FImage",SqlDbType.Image);
//cmd.Parameters["@FImage"].Value=PhotoArray;
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
}
二，从SqlServer中读取并显示出来
在需要显示图片的地方添加如下代码:
<asp:image id="imgPhoto" runat="server" ImageUrl="ShowPhoto.aspx"></asp:image>
ShowPhoto.aspx主体代码：
private void Page_Load(object sender, System.EventArgs e)
{
if(!Page.IsPostBack)
{
SqlConnection conn=new SqlConnection()
conn.ConnectionString="Data Source=localhost;Database=test;User Id=sa;Pwd=sa";
string strSql="select * from test where id=2";//这里假设获取id为2的图片
SqlCommand cmd=new SqlCommand()
reader.Read();
Response.ContentType="application/octet-stream";
Response.BinaryWrite((Byte[])reader["FImage"]);
Response.End();
reader.Close();
}
}
3，在winform中将图片存入sqlserver，并从sqlserver中读取并显示在picturebox中
1,存入sqlserver
数据库结构和使用的存储过过程，同上面的一样
1.1,在窗体中加一个OpenFileDialog控件，命名为ofdSelectPic
1.2,在窗体上添加一个打开文件按钮，添加如下单击事件代码：
Stream ms;
byte[] picbyte;
//ofdSelectPic.ShowDialog();
if (ofdSelectPic.ShowDialog()==DialogResult.OK)
{
if ((ms=ofdSelectPic.OpenFile())!=null)
{
//MessageBox.Show("ok");
picbyte=new byte[ms.Length];
ms.Position=0;
ms.Read(picbyte,0,Convert.ToInt32(ms.Length));
//MessageBox.Show("读取完毕!");
//连接数据库
SqlConnection conn=new SqlConnection();
conn.ConnectionString="Data Source=localhost;Database=test;User Id=sa;Pwd=sa";
SqlCommand cmd=new SqlCommand("UpdateImage",conn);
cmd.CommandType=CommandType.StoredProcedure;
cmd.Parameters.Add("@UpdateImage",SqlDbType.Image);
cmd.Parameters["@UpdateImage"].Value=picbyte;
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
ms.Close();
}
}
2,读取并显示在picturebox中
2.1 添加一个picturebox,名为ptbShow
2.2 添加一个按钮，添加如下响应事件：
SqlConnection conn=new SqlConnection();
conn.ConnectionString="Data Source=localhost;Database=test;User Id=sa;Pwd=sa";
string strSql="select FImage from test where id=1";
SqlCommand cmd=new SqlCommand(strSql,conn);
conn.Open();
SqlDataReader reader=cmd.ExecuteReader();
reader.Read();
MemoryStream ms=new MemoryStream((byte[])reader["FImage"]);
Image image=Image.FromStream(ms,true);
reader.Close();
conn.Close();
ptbShow.Image=image;
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