DataGridView.Rows Propriété

Définition

Obtient une collection qui contient toutes les lignes du contrôle DataGridView.Gets a collection that contains all the rows in the DataGridView control.

public:
 property System::Windows::Forms::DataGridViewRowCollection ^ Rows { System::Windows::Forms::DataGridViewRowCollection ^ get(); };
[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.DataGridViewRowCollection Rows { get; }
member this.Rows : System.Windows.Forms.DataGridViewRowCollection
Public ReadOnly Property Rows As DataGridViewRowCollection

Valeur de propriété

DataGridViewRowCollection qui contient toutes les lignes du DataGridView.A DataGridViewRowCollection that contains all the rows in the DataGridView.

Attributs

Exemples

L’exemple de code suivant montre comment créer un DataGridView indépendant-0 ; Définissez les propriétés ColumnHeadersVisible, ColumnHeadersDefaultCellStyle et ColumnCount ; et utilisent les propriétés Rows et Columns.The following code example demonstrates how to create an unbound DataGridView; set the ColumnHeadersVisible, ColumnHeadersDefaultCellStyle, and ColumnCount properties; and use the Rows and Columns properties. Il montre également comment utiliser une version des méthodes AutoResizeColumnHeadersHeight et AutoResizeRows pour dimensionner correctement les en-têtes de colonnes et les lignes.It also demonstrates how to use a version of the AutoResizeColumnHeadersHeight and AutoResizeRows methods to properly size the column headers and the rows. Pour exécuter cet exemple, collez le code suivant dans un formulaire qui contient un DataGridView nommé dataGridView1 et un bouton nommé Button1, puis appelez la méthode InitializeDataGridView à partir du constructeur du formulaire ou du gestionnaire d’événements Load.To run this example, paste the following code into a form that contains a DataGridView named dataGridView1 and a button named Button1, and then call the InitializeDataGridView method from the form's constructor or Load event handler. Vérifiez que tous les événements sont connectés à l’aide de leurs gestionnaires d’événements.Ensure all events are connected with their event handlers.

   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

Remarques

Vous pouvez utiliser la collection Rows pour remplir manuellement un contrôle DataGridView au lieu de le lier à une source de données.You can use the Rows collection to manually populate a DataGridView control instead of binding it to a data source. L’exemple suivant montre comment ajouter et insérer manuellement des lignes.The following example shows you how to manually add and insert rows. Cet exemple suppose que vous avez ajouté quatre instances DataGridViewTextBoxColumn à la collection Columns du contrôle.This example assumes that you have added four DataGridViewTextBoxColumn instances to the control's Columns collection.

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");  

Pour obtenir un exemple détaillé qui remplit par programmation un contrôle DataGridView indépendant, consultez la section exemple.For a detailed example that programmatically populates an unbound DataGridView control, see the Example section.

Les lignes contiennent des informations de style en plus des valeurs de cellule.Rows include style information in addition to cell values. Pour cette raison, vous souhaiterez peut-être ajouter ou insérer des lignes en fonction de lignes existantes dont vous avez déjà appliqué un style.For this reason, you might want to add or insert rows based on existing rows that you have already styled. Pour ce faire, vous pouvez utiliser les méthodes AddCopy, AddCopies, InsertCopy et InsertCopies.You can do this using the AddCopy, AddCopies, InsertCopy, and InsertCopies methods.

Vous pouvez également utiliser la collection Rows pour modifier les valeurs dans le contrôle ou pour supprimer des lignes.You can also use the Rows collection to modify the values in the control or to remove rows. Vous pouvez modifier des valeurs ou supprimer des lignes, que le contrôle soit lié ou non à une source de données externe.You can modify values or remove rows regardless of whether the control is bound to an external data source. S’il existe une source de données, les modifications sont apportées directement à la source de données.If there is a data source, the changes are made directly to the data source. Toutefois, vous devrez peut-être encore transmettre les mises à jour de la source de données à une base de données distante.You may still need to push the data source updates to a remote database, however. Pour plus d’informations, consultez Guide pratique pour Liez les données au contrôle DataGridView Windows Forms.For more information, see How to: Bind Data to the Windows Forms DataGridView Control.

L’exemple suivant montre comment modifier des valeurs de cellule par programmation.The following example shows you how to modify cell values programmatically.

' 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";  

Outre les fonctionnalités de collection standard, vous pouvez utiliser la collection Rows pour récupérer des informations sur les lignes.In addition to the standard collection capabilities, you can use the Rows collection to retrieve information about rows. Utilisez la méthode GetRowState pour déterminer l’état d’une ligne particulière.Use the GetRowState method to determine the state of a particular row. Utilisez les méthodes GetRowCount et GetRowsHeight pour déterminer le nombre de lignes ou la hauteur combinée des lignes dans un état particulier.Use the GetRowCount and GetRowsHeight methods to determine the number of rows or the combined height of rows in a particular state. Pour récupérer l’index d’une ligne avec un état particulier, utilisez les méthodes GetFirstRow, GetLastRow, GetNextRow et GetPreviousRow.To retrieve the index of a row with a particular state, use the GetFirstRow, GetLastRow, GetNextRow, and GetPreviousRow methods.

L’exemple suivant montre comment récupérer l’index de la première ligne sélectionnée, puis l’utiliser pour supprimer la ligne par programmation.The following example shows you how to retrieve the index of the first selected row, and then use it to programmatically delete the row.

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);  
}  

Pour améliorer les performances, le DataGridViewRowCollection retourné par la propriété Rows peut inclure des lignes partagées et non partagées.To improve performance, the DataGridViewRowCollection returned by the Rows property can include shared and unshared rows. Les lignes partagées partagent la mémoire pour réduire le coût d’un jeu d’enregistrements volumineux.Shared rows share memory to reduce the cost of a large record set. Si votre jeu d’enregistrements est très volumineux, vous devez veiller à conserver les lignes partagées autant que possible lors de l’accès à la propriété Rows.If your record set is very large, you should be careful to keep the rows shared as much as possible when accessing the Rows property.

Pour plus d'informations, consultez Meilleures pratiques pour la mise à l'échelle du contrôle DataGridView Windows Forms.For more information, see Best Practices for Scaling the Windows Forms DataGridView Control.

S’applique à

Voir aussi