C#? ListBox? ?? ?? ?? ??? ?? ???? ?? ListBox? ?? ??? ???? ??? ?????. ???? ??? ?? ??? ???? ???? ??? ? ?? ??? ??? ??? ? ??? ?? ??? ?? ? ?? ?? ?? ?? ??? ??? ? ??? ????. ListBox? ??? ??? ???, ?? ? ???? ?????. ? ListBox? ??? ??? ?????. Windows.Forms ???(??????).

ListBox ????? C#? 3?? ?? ??? ??? ???? ????. ???

1. ?ListBox.ObjectCollection:?? ??? ???? ListBox ???? ?? ??? ???????.
2. ?ListBox.SelectedObjectCollection:?? ??? ???? ListBox ????? ??? ??? ???? ?????.
3. ?ListBox.SelectedIndexCollection:?? ??? ???? ??? ??? ???? ?????. ??? ??? ListBox.ObjectCollection ???? ?? ???? ListBox ????? ??? ??? ??????.

C#? ?? ?? ??? ??????

1. ?? ?? ListBox: ListBox? ???? ?? ??? ??? ? ????.
2. ?? ?? ListBox: ListBox? ???? ?? ??? ??? ? ????.

C#? ListBox ?? ?? ??:

• PC? .Net ?????? ???? ??? ???
• Visual Studio ??

C#?? ListBox? ??? ??? ??????

ListBox? ? ?? ???? ?? ? ????.

• ?????
• ???

1. ?????

???? ?? ??? ?? ?? ?? ? ????. ???? ?? ??

1??: Visual Studio ??

??=>?? ???=>????? ?????

=>Windows Form ?? ????? ??? ??

???? ??? ? ? ????? ?? ???? ?????.

???? ??? ???? OK? ??? ??? ?? Form1.cs(Design) ?? ????

2??: Visual Studio ?? ?? ???? ?? ??? ?????. ?? ?? ? ???? ?? ??? ??? Form1.cs(Design)? ??? ????.

3??: ??? ?? ? Visual Studio ????? ??? ???? Text ??? ??? ?????. ? ??^nd ??? ????? ??? ???? ? ?????.

??:

2. ???

? ???? ?? ?? ?? ????. ??? ListBox? ???? ?? ? ?? ????? ??????. ??? ?? ?????. ?? ListBox, Label, TextField, Button ?? ?? ?? ?? ??? ??? ????. ?? ?? ? ??? ? ? ???? ?? ???? ??? ?? C# ??? ?????. ? ???? ??? ??? ????. ListBox? ???? ?? ??? ???? ??? ???? ??

1??: ListBox() ???? ???? ListBox ???? ????.

??:

ListBox listBox = new ListBox();

2??: ListBox ??? ??? ? Font, Font.Size, Color ? ListBox? ??? ??? ????? ??

??:

listBox.Location = new Point(200, 100);
listBox.Size = new Size(100, 90);
listBox.ForeColor = Color.Red;

3??: ListBox? ??? ?????.

??:

listBox.Items.Add("A");
listBox.Items.Add("B");
listBox.Items.Add("C");
listBox.Items.Add("D");

4??: ??? ? ListBox? ?????.

??:

this.Controls.Add(listBox);

C#? ?? ?? ?

??? ??? ??? ??? ????

?? #1 – ListBox ?? ? ?? ??

??:

//importing C# required libraries
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 is project name
namespace WindowsFormsApplication26
{
//creating class extends from Form class
public partial class Form1 : Form
{
//constrcutor
public Form1()
{
//initializing components
InitializeComponent();
//Creating list box and add some properties and values to the List Box
listBox2.ForeColor = Color.Red;
listBox2.Items.Add("Java");
listBox2.Items.Add("Python");
listBox2.Items.Add("C++");
listBox2.Items.Add("C");
listBox2.Items.Add("C#");
listBox2.Items.Add("Spring");
listBox2.Items.Add("JavaFX");
listBox2.SelectionMode = SelectionMode.MultiSimple;
}
//method for selectedIndex change operation
private void listBox2_SelectedIndexChanged(object sender, EventArgs e)
{
}
}
}

??:

?? #2 – ???? ??? ???? ?? ??? ??? ?? ?????

??:

//importing C# required libraries
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 is project name
namespace WindowsFormsApp25
{
//creating class extends from Form class
public partial class Form1 : Form
{
//constrcutor
public Form1()
{
//initializing components
InitializeComponent();
}
//saving the enter values into List box
private void buttonSave_Click(object sender, EventArgs e)
{
//If user enter any values then if block executes
if (this.textBoxName.Text != "")
{
NameList.Items.Add(this.textBoxName.Text);
this.textBoxName.Focus();
this.textBoxName.Clear();
}
//If user did not enter any values then else block executes
else
{
MessageBox.Show("Please enter a name to add..","Error",MessageBoxButtons.OK,MessageBoxIcon.Information);
this.textBoxName.Focus();
}
}
}
}

??:

?? ???? ?:

?? ?? ???? ?? ?? ??? ?????.

?? ??? ?:

After entering a value and clicking the save button:

Example #3 – Delete, Change the font of List Box values

Code:

//importing C# required libraries
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 is project name
namespace WindowsFormsApp25
{
//creating class extends from Form class
public partial class Form1 : Form
{
//constrcutor
public Form1()
{
//initializing components
InitializeComponent();
}
//saving the enter values into List box
private void buttonSave_Click(object sender, EventArgs e)
{
//If user enter any values then if block executes
if (this.textBoxName.Text != "")
{
NameList.Items.Add(this.textBoxName.Text);
this.textBoxName.Focus();
this.textBoxName.Clear();
}
//If user did not enter any values then else block executes
else
{
MessageBox.Show("Please enter a name to add..","Error",MessageBoxButtons.OK,MessageBoxIcon.Information);
this.textBoxName.Focus();
}
}
//Removing the selected elements
private void button2_Click(object sender, EventArgs e)
{
if (this.NameList.SelectedIndex >= 0)
{
this.NameList.Items.RemoveAt(this.NameList.SelectedIndex);
}
}
//Setting List box selected values font
private void button3_Click(object sender, EventArgs e)
{
if (fontDialog1.ShowDialog() == DialogResult.OK)
{
NameList.Font = fontDialog1.Font;
}
}
}
}

Output:

After adding 3 names:

Deleting selected element:

Change the font of the values:

Conclusion

C# List box is used to add multiple elements to perform any specific operation. List Boxes are used to select a single value or multiple values at a time. In C# List Box can be created using Design-Time and Run-Time methods.

? ??? C#? ?? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!