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Error on this code Parameter is not valid help me.

SqlCommand cmd = new SqlCommand("ReadImage", con);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("@imgId", SqlDbType.Int).Value = Convert.ToInt32(cmbImageID.SelectedValue.ToString());
SqlDataAdapter adp = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
 
try
{
    if (con.State == ConnectionState.Closed)
        con.Open();
    adp.Fill(dt);
    if (dt.Rows.Count > 0)
    {
        MemoryStream ms = new MemoryStream((byte[])dt.Rows[0]["ImageData"]);
        picImage.Image = Image.FromStream(ms);
 
        picImage.SizeMode = PictureBoxSizeMode.StretchImage;
        picImage.Refresh();
    }
}
Table name = ImageData Column name= ImageData
Store procedure ReadImage
CREATE PROCEDURE dbo.ReadImage 
	(@imgId int)
AS
	SELECT ImageData FROM ImageData
	WHERE ImageID=@imgId
	RETURN
Posted 22-Sep-12 1:13am
Edited 22-Sep-12 1:38am
v3

1 solution

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Solution 1

Normally, this error occurs because you what you have saved in the database is not a valid image - so when you retrieve the information the Image.FromStream throws an exception because it cannot recognise it.

Check your loading code: the normal mistakes are not to convert the Image into a bytes array before saving it or building an INSERT statement by concatenating strings, which tends to insert the string "System.Drawing.Image" in the database instead of the image data.
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