How to create an update button with c# in Visual Studio

Hello, I have a table in mysql also that table contains column for an image how do i update my records in mysql database with c# in visual studio. I have used the code below: But when it does not work. If i make any correction it takes me back to the image line saying path cannot be empty.

byte[] imageBt = null;

FileStream fstream = new FileStream(this.txtPicPath.Text, FileMode.Open, FileAccess.Read);

BinaryReader br = new BinaryReader(fstream);

imageBt = br.ReadBytes((int)fstream.Length);

byte[] imageBt1 = null;

FileStream fstream1 = new FileStream(this.txtPicPath1.Text, FileMode.Open, FileAccess.Read);

BinaryReader br1 = new BinaryReader(fstream1);

imageBt1 = br1.ReadBytes((int)fstream1.Length);

string constring = "datasource=localhost;port=3306;username=root;password=natforce123";

string Query = "UPDATE iman_istf.members SET (idcardno = '" + this.textBoxIDCardNo.Text + "', title ='" + this.textBoxTitle.Text + "', firstname ='" + this.textBoxFirstname.Text + "', lastname ='" + this.textBoxLastname.Text + "', stateofoperation ='" + this.comboBoxStateofOperation.Text + "',stateoforigin ='" + this.comboBoxStateofOrigin.Text + "',memberstatus='" + this.comboBoxMemberStatus.Text + "', designation ='" + this.textBoxDesignation.Text + "', sex ='" + this.comboBoxSex.Text + "', dob='" + this.dateTimePickerDOB.Text + "', lga='" + this.textBoxLGA.Text + "', address='" + this.textBoxAddress.Text + "', phoneno='" + this.textBoxPhoneNo.Text + "', idissuedate='" + this.dateTimePickerIDIssueDate.Text + "', appointmentdate='" + this.dateTimePickerAppointmentDate.Text + "', idcard= @IMG, appointmentletter =@IMG1) WHERE idcardno = '" + this.textBoxIDCardNo.Text + "' ;";

MySqlConnection conDatabase = new MySqlConnection(constring);

MySqlCommand cmdDatabase = new MySqlCommand(Query, conDatabase);

MySqlDataReader myReader;

try

{

conDatabase.Open();

cmdDatabase.Parameters.Add(new MySqlParameter("@IMG", imageBt));

cmdDatabase.Parameters.Add(new MySqlParameter("@IMG1", imageBt1));

myReader = cmdDatabase.ExecuteReader();

MessageBox.Show("Updated Successfully!");

while (myReader.Read())

{

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

}