protected void ddlRollNumber_SelectedIndexChanged(object sender, EventArgs e) { //Get student name and ID based on the Selected Class, Section and Roll Sumber string getNameAndID = dbops.getName(ddlClasses.SelectedValue, ddlSection.SelectedValue, ddlRollNumber.SelectedValue); string[] studentInfo = getNameAndID.Split('$'); studentName.Text = studentInfo[0]; studentID.Value = studentInfo[1]; filenameField.Value = studentID.Value + "_" + ddlClasses.SelectedValue + "_" + ddlSection.SelectedValue + "_" + ddlRollNumber.SelectedValue + "_face"; //Check if student is already registered Boolean studentAlreadyExists = dbops.checkForRegisteredStudent(studentID.Value.Trim()); if (studentAlreadyExists) { alreadyExistsLabel.Text = "Student already registered!"; nextRegistration.Visible = true; cameraModule.Enabled = false; btnSave1.Visible = false; videoModule.Visible = false; } else { alreadyExistsLabel.Text = ""; cameraModule.Enabled = true; nextRegistration.Visible = false; btnSave1.Visible = true; videoModule.Visible = true; } }