Question

您好我在SQL Server中存储图像。数据类型为Image。

从数据库中检索图像时出现错误，如

System.ArgumentException：参数无效。

此行img = Image.FromStream(ms)中出现错误。

private void RetriveImage_Click(object sender, EventArgs e)    
{    
    SqlConnection con = new SqlConnection(constr);        
    con.Open();   
    Image img;

    try
    {
        cmd = new SqlCommand("select Pic from emguimg where ID =" + cbxID.SelectedItem, con);

        SqlDataReader dr = cmd.ExecuteReader();

        DataTable dt = new DataTable();
        dt.Load(dr);

        byte[] bytes = (byte[])dt.Rows[0]["Pic"];

        MemoryStream ms = new MemoryStream(bytes);
        ms.Write(bytes, 0, bytes.Length);

        img = Image.FromStream(ms);


        PicBox.Image = img;
        PicBox.SizeMode = PictureBoxSizeMode.StretchImage;
        PicBox.BorderStyle = BorderStyle.Fixed3D;

        ms.Flush();
        ms.Close();
    }
    catch (Exception ex)
    {
        WriteLogMessage(ex.ToString());
    }
}

Answer 1

在从此流加载图片之前填写MemoryStream寻找位置0之后。

ms.Write(bytes, 0, bytes.Length);
ms.Position = 0; //insert this line
img = Image.FromStream(ms);

System.ArgumentException：参数无效。在C＃中

1 个答案: