ListView追加/参照/削除(C#/VB.NET)



ListView追加/参照/削除(C#/VB.NET)

2010年06月19日
ListViewに行追加/行変更(行取得)/行削除するサンプル(ソース/コード)です。

忘れやすいのでメモって置きます。

全ての行(項目)を削除する時は、ListView1.Items.Clear()を使用します。

' -----------------------------------------------------------

' ListViewの追加/変更(取得)/削除のサンプル(VB.NET/VS2005)

Private Sub Form1_Load( _

ByVal sender As System.Object, _

ByVal e As System.EventArgs) Handles MyBase.Load

' ヘッダー初期化

ListView1.Items.Clear()

ListView1.FullRowSelect = True

ListView1.GridLines = True

ListView1.View = View.Details

Dim column1 As ColumnHeader = New ColumnHeader

Dim column2 As ColumnHeader = New ColumnHeader

Dim column3 As ColumnHeader = New ColumnHeader

column1.Text = "Hour"

column2.Text = "Minute"

column3.Text = "Second"

Dim colHeaderRegValue() As ColumnHeader = _

{column1, column2, column3}

ListView1.Columns.AddRange(colHeaderRegValue)

End Sub

Private Sub Button1_Click( _

ByVal sender As System.Object, _

ByVal e As System.EventArgs) Handles Button1.Click

' 選択行特定

Dim intRow As Integer = -1

If ListView1.SelectedItems.Count > 0 Then

intRow = ListView1.SelectedItems(0).Index

End If

If intRow < 0 Then

' 行追加

Dim citm(2) As String

citm(0) = DateTime.Now.Hour

citm(1) = DateTime.Now.Minute

citm(2) = DateTime.Now.Second

Dim ritm As ListViewItem = New ListViewItem(citm)

ListView1.Items.Add(ritm)

Else

' 行挿入

Dim citm(2) As String

citm(0) = DateTime.Now.Hour

citm(1) = DateTime.Now.Minute

citm(2) = DateTime.Now.Second

Dim ritm As ListViewItem = New ListViewItem(citm)

ListView1.Items.Insert(intRow, ritm)

ListView1.Select()

End If

End Sub

Private Sub Button2_Click( _

ByVal sender As System.Object, _

ByVal e As System.EventArgs) Handles Button2.Click

' 選択行特定

Dim intRow As Integer = -1

If ListView1.SelectedItems.Count > 0 Then

intRow = ListView1.SelectedItems(0).Index

End If

If intRow < 0 Then Return

' 選択行更新

Dim citm(2) As String

citm(0) = DateTime.Now.Hour

citm(1) = DateTime.Now.Minute

citm(2) = DateTime.Now.Second

Dim ritm As ListViewItem = New ListViewItem(citm)

ListView1.Items(intRow) = ritm

' 再選択

If ListView1.Items.Count > intRow Then

ListView1.Items(intRow).Selected = True

ListView1.Select()

End If

End Sub

Private Sub Button3_Click( _

ByVal sender As System.Object, _

ByVal e As System.EventArgs) Handles Button3.Click

' 選択行特定

Dim intRow As Integer = -1

If ListView1.SelectedItems.Count > 0 Then

intRow = ListView1.SelectedItems(0).Index

End If

If intRow < 0 Then Return

' 選択行削除

ListView1.Items.RemoveAt(intRow)

' 再選択

If ListView1.Items.Count > intRow Then

ListView1.Items(intRow).Selected = True

ListView1.Select()

End If

End Sub

Private Sub Button4_Click( _

ByVal sender As System.Object, _

ByVal e As System.EventArgs) Handles Button4.Click

' 選択行特定

Dim intRow As Integer = -1

If ListView1.SelectedItems.Count > 0 Then

intRow = ListView1.SelectedItems(0).Index

End If

If intRow < 0 Then Return

' 選択行参照

System.Diagnostics.Debug.WriteLine( _

ListView1.Items(intRow).SubItems(0).Text & ":" & _

ListView1.Items(intRow).SubItems(1).Text & ":" & _

ListView1.Items(intRow).SubItems(2).Text)

' 再選択

If ListView1.Items.Count > intRow Then

ListView1.Items(intRow).Selected = True

ListView1.Select()

End If

End Sub

' -----------------------------------------------------------

// ----------------------------------------------------------

// ListViewの追加/変更(取得)/削除のサンプル(C#.NET/VS2005)

private void Form1_Load(object sender, EventArgs e)

{

// ヘッダー初期化

listView1.Items.Clear();

listView1.FullRowSelect = true;

listView1.GridLines = true;

listView1.View = View.Details;

ColumnHeader column1 = new ColumnHeader();

ColumnHeader column2 = new ColumnHeader();

ColumnHeader column3 = new ColumnHeader();

column1.Text = "Hour";

column2.Text = "Minute";

column3.Text = "Second";

ColumnHeader[] colHeaderRegValue = new ColumnHeader[]

{column1, column2, column3};

listView1.Columns.AddRange(colHeaderRegValue);

}

private void button1_Click(object sender, EventArgs e)

{

// 選択行特定

int intRow  = -1;

if (listView1.SelectedItems.Count > 0)

{

intRow = listView1.SelectedItems[0].Index;

}

if (intRow < 0)

{

// 行追加

String[] citm = new String[3];

citm[0] = DateTime.Now.Hour.ToString();

citm[1] = DateTime.Now.Minute.ToString();

citm[2] = DateTime.Now.Second.ToString();

ListViewItem ritm = new ListViewItem(citm);

listView1.Items.Add(ritm);

}

else

{

// 行挿入

String[] citm = new String[3];

citm[0] = DateTime.Now.Hour.ToString();

citm[1] = DateTime.Now.Minute.ToString();

citm[2] = DateTime.Now.Second.ToString();

ListViewItem ritm = new ListViewItem(citm);

listView1.Items.Insert(intRow, ritm);

listView1.Select();

}

}

private void button2_Click(object sender, EventArgs e)

{

// 選択行特定

int intRow = -1;

if (listView1.SelectedItems.Count > 0)

{

intRow = listView1.SelectedItems[0].Index;

}

if (intRow < 0) return;

// 選択行更新

String[] citm = new String[3];

citm[0] = DateTime.Now.Hour.ToString();

citm[1] = DateTime.Now.Minute.ToString();

citm[2] = DateTime.Now.Second.ToString();

ListViewItem ritm = new ListViewItem(citm);

listView1.Items[intRow] = ritm;

// 再選択

if (listView1.Items.Count > intRow)

{

listView1.Items[intRow].Selected = true;

listView1.Select();

}

}

private void button3_Click(object sender, EventArgs e)

{

// 選択行特定

int intRow = -1;

if (listView1.SelectedItems.Count > 0)

{

intRow = listView1.SelectedItems[0].Index;

}

if (intRow < 0) return;

// 選択行削除

listView1.Items.RemoveAt(intRow);

// 再選択

if (listView1.Items.Count > intRow)

{

listView1.Items[intRow].Selected = true;

listView1.Select();

}

}

private void button4_Click(object sender, EventArgs e)

{

// 選択行特定

int intRow = -1;

if (listView1.SelectedItems.Count > 0)

{

intRow = listView1.SelectedItems[0].Index;

}

if (intRow < 0) return;

// 選択行参照

System.Diagnostics.Debug.WriteLine(

listView1.Items[intRow].SubItems[0].Text + ":" +

listView1.Items[intRow].SubItems[1].Text + ":" +

listView1.Items[intRow].SubItems[2].Text);

// 再選択

if (listView1.Items.Count > intRow)

{

listView1.Items[intRow].Selected = true;

listView1.Select();

}

}

// ----------------------------------------------------------