DataGridView.Rows Propriedade

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.DataGridViewRowCollection

Public ReadOnly Property Rows As DataGridViewRowCollection

Valor de Propriedade

A DataGridViewRowCollection que contém todas as linhas do DataGridView.

Atributos

BrowsableAttribute

Exemplos

O exemplo de código seguinte demonstra como criar um unbound DataGridView; defina as ColumnHeadersVisiblepropriedades , ColumnHeadersDefaultCellStyle, e ColumnCount ; e use as Rows propriedades e Columns . Também demonstra como usar uma versão dos AutoResizeColumnHeadersHeight métodos and AutoResizeRows para dimensionar corretamente os cabeçalhos das colunas e as linhas. Para executar este exemplo, cole o código seguinte num formulário que contenha um DataGridView nome dataGridView1 e um botão chamado Button1, e depois chame o InitializeDataGridView método a partir do construtor ou Load handler de eventos do formulário. Assegure que todos os eventos estão ligados aos seus gestores de eventos.

   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

Observações

Pode usar a Rows coleção para preencher manualmente um DataGridView controlo em vez de o ligar a uma fonte de dados. O exemplo seguinte mostra-te como adicionar e inserir linhas manualmente. Este exemplo assume que adicionou quatro DataGridViewTextBoxColumn instâncias à coleção do Columns controlo.

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");

Para um exemplo detalhado que preenche programaticamente um controlo não vinculado DataGridView , veja a secção Exemplo.

As linhas incluem informação de estilo para além dos valores das células. Por esta razão, pode querer adicionar ou inserir linhas com base em linhas já existentes que já estilizou. Pode fazer isto usando os AddCopymétodos , AddCopies, InsertCopy, e InsertCopies .

Também pode usar a Rows coleção para modificar os valores no controlo ou remover linhas. Pode modificar valores ou remover linhas independentemente de o controlo estar vinculado a uma fonte de dados externa. Se existir uma fonte de dados, as alterações são feitas diretamente para essa fonte. No entanto, pode ainda precisar de enviar as atualizações da fonte de dados para uma base de dados remota. Para obter mais informações, consulte Como vincular dados ao controle DataGridView do Windows Forms.

O exemplo seguinte mostra-lhe como modificar os valores das células de forma programática.

' 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";

Para além das capacidades padrão de recolha, pode usar a Rows coleção para obter informações sobre as linhas. Use o GetRowState método para determinar o estado de uma determinada linha. Use os GetRowCount métodos e GetRowsHeight para determinar o número de linhas ou a altura combinada das linhas num determinado estado. Para recuperar o índice de uma linha com um estado particular, use os GetFirstRowmétodos , GetLastRow, GetNextRow, e GetPreviousRow .

O exemplo seguinte mostra-lhe como recuperar o índice da primeira linha selecionada e depois usá-lo para apagar programaticamente a linha.

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);
}

Para melhorar o desempenho, os DataGridViewRowCollection devolvidos pela Rows propriedade podem incluir linhas partilhadas e não partilhadas. As linhas partilhadas partilham memória para reduzir o custo de um grande conjunto de registos. Se o seu conjunto de registos for muito grande, deve ter cuidado para manter as linhas partilhadas o máximo possível ao aceder à Rows propriedade.

Para mais informações, consulte Boas Práticas para Escalar o Controlo Windows Forms DataGridView.

Ver também

• DataGridView Control (Windows Forms)