I am creating a number of comboBoxes based on user input. I create the boxes just fine, but when it comes to wanting to check the text within them I am struggling.
I thought of maybe storing them in a IList but that hasn't seemed to work so far. The goal is to change the text of all of them on a button click, but after several attempts I am becoming frustrated.
IList<ComboBox> comboBoxes = new List<ComboBox>();
private void AddComboBox(int i)
{
var comboBoxStudentAttendance = new ComboBox();
comboBoxStudentAttendance.Top = TopMarginDistance(i);
comboBoxStudentAttendance.Items.Add("");
comboBoxStudentAttendance.Items.Add("Present");
comboBoxStudentAttendance.Items.Add("Absent");
comboBoxStudentAttendance.Items.Add("Late");
comboBoxStudentAttendance.Items.Add("Sick");
comboBoxStudentAttendance.Items.Add("Excused");
comboBoxes.Add(comboBoxStudentAttendance);
this.Controls.Add(comboBoxStudentAttendance);
}
I tried the following but with no success.
private void DistributeAttendanceButton_Click(object sender, EventArgs e)
{
for (int i = 0; i < sampleNum; i++)
{
switch (MasterComboBox.Text)
{
case "Present":
comboBoxes.ElementAt(i).Text = "Present";
break;
}
}
}
Try this
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
const int TOP_MARGIN = 10;
const int LEFT_MARGIN = 10;
const int WIDTH = 200;
const int HEIGHT = 10;
const int SPACE = 15;
const int NUMBER_OF_BOXES = 10;
public Form1()
{
InitializeComponent();
MasterComboBox.Text = "Present";
for (int i = 0; i < NUMBER_OF_BOXES; i++)
{
AddComboBox(i);
}
}
List<ComboBox> comboBoxes = new List<ComboBox>();
private void AddComboBox(int i)
{
var comboBoxStudentAttendance = new ComboBox();
comboBoxStudentAttendance.Top = TOP_MARGIN + i * (SPACE + HEIGHT);
comboBoxStudentAttendance.Left = LEFT_MARGIN;
comboBoxStudentAttendance.Width = WIDTH;
comboBoxStudentAttendance.Height = HEIGHT;
comboBoxStudentAttendance.Items.Add("");
comboBoxStudentAttendance.Items.Add("Present");
comboBoxStudentAttendance.Items.Add("Absent");
comboBoxStudentAttendance.Items.Add("Late");
comboBoxStudentAttendance.Items.Add("Sick");
comboBoxStudentAttendance.Items.Add("Excused");
comboBoxes.Add(comboBoxStudentAttendance);
this.Controls.Add(comboBoxStudentAttendance);
}
private void DistributeAttendanceButton_Click(object sender, EventArgs e)
{
for (int i = 0; i < comboBoxes.Count; i++)
{
switch (MasterComboBox.Text)
{
case "Present":
comboBoxes[i].Text = "Present";
break;
}
}
}
}
}
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