从mysql数据库C#中检索Blob图片 [英] retrieve blob picture from mysql database c#
本文介绍了从mysql数据库C#中检索Blob图片的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我使用此代码来检索我的图片,它与仅包含blob的简单表紧密协作,但是当我尝试将其调整为包含(cin,nom,prenom ....,image)的表用户时)表示
I use this code to retrieve my picture and it work corectly with a simple table that contain only blob but when i'm trying to adapt it for my table user that containt (cin,nom,prenom....,image) exception that indicate
参数无效"(无效参数)
int bufferSize = 1000;
try
{
string SQL = "Select image from user ";
MySqlCommand cmd = new MySqlCommand(SQL, db.Connection);
MySqlDataAdapter da = new MySqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds, "image");
int c = ds.Tables["image"].Rows.Count;
db.CloseConnection();
if (c > 0)
{
Byte[] byteBLOBData = new Byte[bufferSize];
byteBLOBData = (Byte[])(ds.Tables["image"].Rows[c - 1]["image"]);
MemoryStream stmBLOBData = new MemoryStream(byteBLOBData);
pictureBox1.Image = Image.FromStream(stmBLOBData);
MessageBox.Show("bien chargée");
}
}
catch (Exception ex)
{
MessageBox.Show("Connection Error!\n" + ex.Message, "Error Message",
MessageBoxButtons.OK, MessageBoxIcon.Error);
}
推荐答案
byteBLOBData = ((Byte[])ds.Tables["image"].Rows[c - 1]["image"]);
这应该解决它.
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