ListView追加/参照/削除(C#/VB.NET)
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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();
}
}
// ----------------------------------------------------------
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