图片以二进制的方式存入数据库,以及取出图片

protected void saveimage_Click(object sender, EventArgs e)
{
#region 把图片以二进制的形式存入数据库
Stream imageStream;
string path = fileupload.PostedFile.FileName;//文件名
int size = fileupload.PostedFile.ContentLength;//文件大小
string type = fileupload.PostedFile.ContentType;//文件类型
imageStream = fileupload.PostedFile.InputStream;
byte[] content = new byte[size];
//=Request.QueryString["name"];
string name = this.name.Text.Trim();
int status = imageStream.Read(content, 0, size);
string sql = "insert into pacture (image,name)values(@image,@name) ";
SqlParameter[] pams = {
new SqlParameter("@image",content),
new SqlParameter("@name",name)
};
int i = ExecuteNonQuery(sql, pams);
if (i > 0)
{
ScriptManager.RegisterStartupScript(this, this.GetType(), null, "alert('成功！')", true);
}
else
{
ScriptManager.RegisterStartupScript(this, this.GetType(), null, "alert('失败！')", true);
}
#endregion
}

此方法中：image字段的数据类型应为image

protected void getimage_Click(object sender, EventArgs e)
{
string sql = "select * from pacture";
DataTable dt = ExecuteDataTable(sql, null);
byte[] bt=null;
if (dt.Rows.Count > 0)
{
bt = (byte[])dt.Rows[0][1];
}
#region 把图片输出到指定目录
FileStream fs = new FileStream(@"H:\1.jpg", FileMode.Create, FileAccess.Write);
fs.Write(bt, 0, bt.Length);
fs.Flush();
fs.Close();
#endregion
#region 把图片显示在网页
//Response.ContentType = "application/octet-stream";
//Response.BinaryWrite(bt);
//Response.End();
#endregion
}