I'm trying to make a test website where i can upload an image and some text in a database and retrieve the image in a "preview" Image control. I already managed to store these elements as varchar and blob(MEDIUMBLOB).(MySql)
However i'm having trouble trying to show the stored image in the Image control.
here's the code:
MySqlConnection conn;
MySqlCommand comand;
String queryStr;
MySqlDataAdapter daa;
protected void Button1_Click(object sender, EventArgs e)
{
HttpPostedFile postedFile = FileUpload1.PostedFile;
string fileName = Path.GetFileName(postedFile.FileName);
string fileExtension = Path.GetExtension(fileName);
int fileSize = postedFile.ContentLength;
try
{
if (fileExtension.ToLower()==".jpg" || fileExtension.ToLower() == ".png")
{
AgregarCiudad();//add city method in spanish
Response.Write("Exito");
MostrarImagen();//show image method also in spanish lol
}
else
{
Response.Write("Solo Imagenes .jpg o .png de 15 megabites o menos.");
}
}
catch (FileNotFoundException fFileNotFound)
{
//log the exception the specified fFileNotFound variable has to be put in a string, label or response.
Response.Write("Error." + fFileNotFound.Message);
}
catch (Exception)
{
Response.Write("Error");
}
}
private void AgregarCiudad()
{
String connString = System.Configuration.ConfigurationManager.ConnectionStrings["WebAppConnString"].ToString();
conn = new MySqlConnection(connString);
conn.Open();
queryStr = "";
queryStr = "INSERT INTO testingdb.country (Relation, Name, ImageStock)" +
"VALUES(?Relation, ?Name, ?ImageStock)";
comand = new MySqlCommand(queryStr, conn);
comand.Parameters.AddWithValue("?Relation", TextBox1.Text);
comand.Parameters.AddWithValue("?Name", TextBox2.Text);
comand.Parameters.AddWithValue("?ImageStock", FileUpload1);
comand.ExecuteReader();
conn.Close();
}
as you can see here, i don't know what else to do now, what could be done to make this method to show the recently stored image in the Image control (Image1)?
private void MostrarImagen()
{
String selectQuery = "SELECT ImageStock FROM testingdb.country WHERE
Name ='" + TextBox2.Text + "'";
comand = new MySqlCommand(selectQuery, conn);
MySqlDataReader reader;
reader = comand.ExecuteReader();
Image1.ImageUrl = selectQuery;
conn.Close();
}
I am supposing that you are receiving the blob data from the database. After that try something like this:
string base64String = Convert.ToBase64String(your blob);
Image1.ImageUrl = "data:image/png;base64," + base64String;
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