DataGridView.Rows Properti
Definisi
Penting
Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.
Mendapatkan koleksi yang berisi semua baris dalam DataGridView kontrol.
public:
property System::Windows::Forms::DataGridViewRowCollection ^ Rows { System::Windows::Forms::DataGridViewRowCollection ^ get(); };[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.DataGridViewRowCollection Rows { get; }[<System.ComponentModel.Browsable(false)>]
member this.Rows : System.Windows.Forms.DataGridViewRowCollectionPublic ReadOnly Property Rows As DataGridViewRowCollectionNilai Properti
DataGridViewRowCollection yang berisi semua baris di DataGridView.
- Atribut
Contoh
Contoh kode berikut menunjukkan cara membuat unbound ; mengatur ColumnHeadersVisibleproperti , , ColumnHeadersDefaultCellStyledan ColumnCount ; dan menggunakan Rows properti dan Columns .DataGridView Ini juga menunjukkan cara menggunakan versi AutoResizeColumnHeadersHeight metode dan AutoResizeRows untuk mengukur header kolom dan baris dengan benar. Untuk menjalankan contoh ini, tempelkan kode berikut ke dalam formulir yang berisi DataGridView bernama dataGridView1 dan tombol bernama Button1, lalu panggil InitializeDataGridView metode dari konstruktor formulir atau Load penanganan aktivitas. Pastikan semua peristiwa terhubung dengan penanganan aktivitas mereka.
void InitializeDataGridView()
{
this->Size = System::Drawing::Size( 600, 600 );
dataGridView1->Size = System::Drawing::Size( 450, 400 );
// Create an unbound DataGridView by declaring a column count.
dataGridView1->ColumnCount = 4;
dataGridView1->ColumnHeadersVisible = true;
// Set the column header style.
DataGridViewCellStyle ^ columnHeaderStyle = gcnew DataGridViewCellStyle;
columnHeaderStyle->BackColor = Color::Aqua;
columnHeaderStyle->Font = gcnew System::Drawing::Font( "Verdana",10,FontStyle::Bold );
dataGridView1->ColumnHeadersDefaultCellStyle = columnHeaderStyle;
// Set the column header names.
dataGridView1->Columns[ 0 ]->Name = "Recipe";
dataGridView1->Columns[ 1 ]->Name = "Category";
dataGridView1->Columns[ 2 ]->Name = "Main Ingredients";
dataGridView1->Columns[ 3 ]->Name = "Rating";
// Populate the rows.
array<String^>^row1 = gcnew array<String^>{
"Meatloaf","Main Dish","ground beef","**"
};
array<String^>^row2 = gcnew array<String^>{
"Key Lime Pie","Dessert","lime juice, evaporated milk","****"
};
array<String^>^row3 = gcnew array<String^>{
"Orange-Salsa Pork Chops","Main Dish","pork chops, salsa, orange juice","****"
};
array<String^>^row4 = gcnew array<String^>{
"Black Bean and Rice Salad","Salad","black beans, brown rice","****"
};
array<String^>^row5 = gcnew array<String^>{
"Chocolate Cheesecake","Dessert","cream cheese","***"
};
array<String^>^row6 = gcnew array<String^>{
"Black Bean Dip","Appetizer","black beans, sour cream","***"
};
array<Object^>^rows = {row1,row2,row3,row4,row5,row6};
System::Collections::IEnumerator^ myEnum = rows->GetEnumerator();
while ( myEnum->MoveNext() )
{
array<String^>^rowArray = safe_cast<array<String^>^>(myEnum->Current);
dataGridView1->Rows->Add( rowArray );
}
}
void Button1_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
// Resize the height of the column headers.
dataGridView1->AutoResizeColumnHeadersHeight();
// Resize all the row heights to fit the contents of all non-header cells.
dataGridView1->AutoResizeRows(
DataGridViewAutoSizeRowsMode::AllCellsExceptHeaders);
}
void InitializeContextMenu()
{
// Create the menu item.
MenuItem^ getRecipe = gcnew MenuItem( "Search for recipe",gcnew System::EventHandler( this, &Form1::OnMenuClick ) );
// Add the menu item to the shortcut menu.
System::Windows::Forms::ContextMenuStrip^ recipeMenu = gcnew System::Windows::Forms::ContextMenuStrip();
// Set the shortcut menu for the first column.
dataGridView1->Columns[ 0 ]->ContextMenuStrip = recipeMenu;
}
void OnMenuClick( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
if ( dataGridView1->CurrentCell != nullptr )
{
//Retrieve the recipe name.
String^ recipeName = dynamic_cast<String^>(dataGridView1->CurrentCell->Value);
//Search for the recipe.
System::Diagnostics::Process::Start( String::Format( "http://search.msn.com/results.aspx?q={0}", recipeName ), nullptr );
}
}
private:
private void InitializeDataGridView()
{
// Create an unbound DataGridView by declaring a column count.
dataGridView1.ColumnCount = 4;
dataGridView1.ColumnHeadersVisible = true;
// Set the column header style.
DataGridViewCellStyle columnHeaderStyle = new DataGridViewCellStyle();
columnHeaderStyle.BackColor = Color.Beige;
columnHeaderStyle.Font = new Font("Verdana", 10, FontStyle.Bold);
dataGridView1.ColumnHeadersDefaultCellStyle = columnHeaderStyle;
// Set the column header names.
dataGridView1.Columns[0].Name = "Recipe";
dataGridView1.Columns[1].Name = "Category";
dataGridView1.Columns[2].Name = "Main Ingredients";
dataGridView1.Columns[3].Name = "Rating";
// Populate the rows.
string[] row1 = new string[] { "Meatloaf", "Main Dish", "ground beef",
"**" };
string[] row2 = new string[] { "Key Lime Pie", "Dessert",
"lime juice, evaporated milk", "****" };
string[] row3 = new string[] { "Orange-Salsa Pork Chops", "Main Dish",
"pork chops, salsa, orange juice", "****" };
string[] row4 = new string[] { "Black Bean and Rice Salad", "Salad",
"black beans, brown rice", "****" };
string[] row5 = new string[] { "Chocolate Cheesecake", "Dessert",
"cream cheese", "***" };
string[] row6 = new string[] { "Black Bean Dip", "Appetizer",
"black beans, sour cream", "***" };
object[] rows = new object[] { row1, row2, row3, row4, row5, row6 };
foreach (string[] rowArray in rows)
{
dataGridView1.Rows.Add(rowArray);
}
}
private void button1_Click(object sender, System.EventArgs e)
{
// Resize the height of the column headers.
dataGridView1.AutoResizeColumnHeadersHeight();
// Resize all the row heights to fit the contents of all non-header cells.
dataGridView1.AutoResizeRows(
DataGridViewAutoSizeRowsMode.AllCellsExceptHeaders);
}
private void InitializeContextMenu()
{
// Create the menu item.
ToolStripMenuItem getRecipe = new ToolStripMenuItem("Search for recipe", null,
new System.EventHandler(ShortcutMenuClick));
// Add the menu item to the shortcut menu.
ContextMenuStrip recipeMenu = new ContextMenuStrip();
recipeMenu.Items.Add(getRecipe);
// Set the shortcut menu for the first column.
dataGridView1.Columns[0].ContextMenuStrip = recipeMenu;
dataGridView1.MouseDown += new MouseEventHandler(dataGridView1_MouseDown);
}
private DataGridViewCell clickedCell;
private void dataGridView1_MouseDown(object sender, MouseEventArgs e)
{
// If the user right-clicks a cell, store it for use by the shortcut menu.
if (e.Button == MouseButtons.Right)
{
DataGridView.HitTestInfo hit = dataGridView1.HitTest(e.X, e.Y);
if (hit.Type == DataGridViewHitTestType.Cell)
{
clickedCell =
dataGridView1.Rows[hit.RowIndex].Cells[hit.ColumnIndex];
}
}
}
private void ShortcutMenuClick(object sender, System.EventArgs e)
{
if (clickedCell != null)
{
//Retrieve the recipe name.
string recipeName = (string)clickedCell.Value;
//Search for the recipe.
System.Diagnostics.Process.Start(
"http://search.msn.com/results.aspx?q=" + recipeName);
//null);
}
}
Private Sub InitializeDataGridView()
' Create an unbound DataGridView by declaring a column count.
dataGridView1.ColumnCount = 4
dataGridView1.ColumnHeadersVisible = True
' Set the column header style.
Dim columnHeaderStyle As New DataGridViewCellStyle()
columnHeaderStyle.BackColor = Color.Beige
columnHeaderStyle.Font = New Font("Verdana", 10, FontStyle.Bold)
dataGridView1.ColumnHeadersDefaultCellStyle = columnHeaderStyle
' Set the column header names.
dataGridView1.Columns(0).Name = "Recipe"
dataGridView1.Columns(1).Name = "Category"
dataGridView1.Columns(2).Name = "Main Ingredients"
dataGridView1.Columns(3).Name = "Rating"
' Populate the rows.
Dim row1() As String = {"Meatloaf", "Main Dish", "ground beef", "**"}
Dim row2() As String = _
{"Key Lime Pie", "Dessert", "lime juice, evaporated milk", "****"}
Dim row3() As String = {"Orange-Salsa Pork Chops", "Main Dish", _
"pork chops, salsa, orange juice", "****"}
Dim row4() As String = {"Black Bean and Rice Salad", "Salad", _
"black beans, brown rice", "****"}
Dim row5() As String = _
{"Chocolate Cheesecake", "Dessert", "cream cheese", "***"}
Dim row6() As String = _
{"Black Bean Dip", "Appetizer", "black beans, sour cream", "***"}
Dim rows() As Object = {row1, row2, row3, row4, row5, row6}
Dim rowArray As String()
For Each rowArray In rows
dataGridView1.Rows.Add(rowArray)
Next rowArray
End Sub
Private Sub button1_Click(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles button1.Click
' Resize the height of the column headers.
dataGridView1.AutoResizeColumnHeadersHeight()
' Resize all the row heights to fit the contents of all
' non-header cells.
dataGridView1.AutoResizeRows( _
DataGridViewAutoSizeRowsMode.AllCellsExceptHeaders)
End Sub
Private Sub InitializeContextMenu()
' Create the menu item.
Dim getRecipe As New ToolStripMenuItem( _
"Search for recipe", Nothing, AddressOf ShortcutMenuClick)
' Add the menu item to the shortcut menu.
Dim recipeMenu As New ContextMenuStrip()
recipeMenu.Items.Add(getRecipe)
' Set the shortcut menu for the first column.
dataGridView1.Columns(0).ContextMenuStrip = recipeMenu
End Sub
Private clickedCell As DataGridViewCell
Private Sub dataGridView1_MouseDown(ByVal sender As Object, _
ByVal e As MouseEventArgs) Handles dataGridView1.MouseDown
' If the user right-clicks a cell, store it for use by the
' shortcut menu.
If e.Button = MouseButtons.Right Then
Dim hit As DataGridView.HitTestInfo = _
dataGridView1.HitTest(e.X, e.Y)
If hit.Type = DataGridViewHitTestType.Cell Then
clickedCell = _
dataGridView1.Rows(hit.RowIndex).Cells(hit.ColumnIndex)
End If
End If
End Sub
Private Sub ShortcutMenuClick(ByVal sender As Object, _
ByVal e As System.EventArgs)
If (clickedCell IsNot Nothing) Then
'Retrieve the recipe name.
Dim recipeName As String = CStr(clickedCell.Value)
'Search for the recipe.
System.Diagnostics.Process.Start( _
"http://search.msn.com/results.aspx?q=" + recipeName)
End If
End Sub
Keterangan
Anda dapat menggunakan Rows koleksi untuk mengisi DataGridView kontrol secara manual alih-alih mengikatnya ke sumber data. Contoh berikut menunjukkan kepada Anda cara menambahkan dan menyisipkan baris secara manual. Contoh ini mengasumsikan bahwa Anda telah menambahkan empat DataGridViewTextBoxColumn instans ke koleksi kontrol Columns .
Me.dataGridView1.Rows.Add("five", "six", "seven", "eight")
Me.dataGridView1.Rows.Insert(0, "one", "two", "three", "four")
this.dataGridView1.Rows.Add("five", "six", "seven", "eight");this.dataGridView1.Rows.Insert(0, "one", "two", "three", "four");
Untuk contoh terperinci yang secara terprogram mengisi kontrol yang tidak terikat DataGridView , lihat bagian Contoh.
Baris menyertakan informasi gaya selain nilai sel. Untuk alasan ini, Anda mungkin ingin menambahkan atau menyisipkan baris berdasarkan baris yang sudah ada yang telah Anda gaya. Anda dapat melakukan ini menggunakan AddCopymetode , AddCopies, InsertCopy, dan InsertCopies .
Anda juga dapat menggunakan Rows koleksi untuk mengubah nilai dalam kontrol atau untuk menghapus baris. Anda dapat mengubah nilai atau menghapus baris terlepas dari apakah kontrol terikat ke sumber data eksternal. Jika ada sumber data, perubahan dilakukan langsung ke sumber data. Namun, Anda mungkin masih perlu mendorong pembaruan sumber data ke database jarak jauh. Untuk informasi selengkapnya, lihat Cara: Mengikat Data ke Formulir Windows Kontrol DataGridView.
Contoh berikut menunjukkan kepada Anda cara mengubah nilai sel secara terprogram.
' Modify the value in the first cell of the second row.
Me.dataGridView1.Rows[1].Cells[0].Value = "new value"
' The previous line is equivalent to the following line.
Me.dataGridView1[0, 1].Value = "new value"
// Modify the value in the first cell of the second row.
this.dataGridView1.Rows[1].Cells[0].Value = "new value";
// The previous line is equivalent to the following line.
this.dataGridView1[0, 1].Value = "new value";
Selain kemampuan koleksi standar, Anda dapat menggunakan Rows koleksi untuk mengambil informasi tentang baris. GetRowState Gunakan metode untuk menentukan status baris tertentu. GetRowCount Gunakan metode dan GetRowsHeight untuk menentukan jumlah baris atau tinggi gabungan baris dalam status tertentu. Untuk mengambil indeks baris dengan status tertentu, gunakan GetFirstRowmetode , GetLastRow, GetNextRow, dan GetPreviousRow .
Contoh berikut menunjukkan kepada Anda cara mengambil indeks baris pertama yang dipilih, lalu menggunakannya untuk menghapus baris secara terprogram.
Dim rowToDelete As Int32 = Me.dataGridView1.Rows.GetFirstRow( _
DataGridViewElementStates.Selected)
If rowToDelete > -1 Then
Me.dataGridView1.Rows.RemoveAt(rowToDelete)
End If
Int32 rowToDelete = this.dataGridView1.Rows.GetFirstRow(
DataGridViewElementStates.Selected);
if (rowToDelete > -1)
{
this.dataGridView1.Rows.RemoveAt(rowToDelete);
}
Untuk meningkatkan performa, DataGridViewRowCollection yang dikembalikan oleh Rows properti dapat menyertakan baris bersama dan tidak dibagikan. Baris bersama berbagi memori untuk mengurangi biaya kumpulan catatan besar. Jika kumpulan catatan Anda sangat besar, Anda harus berhati-hati untuk menjaga baris yang dibagikan sebanyak mungkin saat mengakses Rows properti.
Untuk informasi selengkapnya, lihat Praktik Terbaik untuk Menskalakan Kontrol Formulir Windows DataGridView.
