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DataGridViewColumn, classe

Représente une colonne dans un contrôle DataGridView.

Espace de noms: System.Windows.Forms
Assembly : System.Windows.Forms (dans system.windows.forms.dll)

[TypeConverterAttribute(typeof(DataGridViewColumnConverter))] 
public class DataGridViewColumn : DataGridViewBand, IComponent, IDisposable
/** @attribute TypeConverterAttribute(System.Windows.Forms.DataGridViewColumnConverter) */ 
public class DataGridViewColumn extends DataGridViewBand implements IComponent, IDisposable
TypeConverterAttribute(System.Windows.Forms.DataGridViewColumnConverter) 
public class DataGridViewColumn extends DataGridViewBand implements IComponent, IDisposable
Non applicable.

La classe DataGridViewColumn représente une colonne logique dans un contrôle DataGridView. Vous pouvez récupérer des colonnes par l'intermédiaire de la collection Columns du contrôle.

Contrairement à DataGridViewRow qui contient la collection réelle de cellules dans DataGridView, DataGridViewColumn est utilisé principalement pour modifier l'apparence et le comportement de l'interface utilisateur de la colonne, par exemple la largeur de colonne et le style de cellule. Pour plus d'informations sur les styles de cellule, consultez Styles de cellules dans le contrôle DataGridView Windows Forms.

Les types qui dérivent de DataGridViewColumn initialisent généralement la propriété CellTemplate sur une nouvelle instance d'un type connexe dérivé de la classe DataGridViewCell. Les propriétés de colonne qui s'appliquent à l'apparence ou au comportement des cellules sont des wrappers des propriétés correspondantes du modèle de cellule. La modification de l'une de ces propriétés de la colonne modifie automatiquement la valeur du modèle de cellule et de toutes les cellules de la colonne. Pour substituer la valeur spécifiée pour des cellules, définissez les valeurs de cellule après avoir spécifié la valeur de la colonne.

Remarques à l'attention des héritiers : Lorsque vous effectuez une dérivation à partir de DataGridViewColumn et que vous ajoutez de nouvelles propriétés à la classe dérivée, veillez à substituer la méthode Clone pour copier les nouvelles propriétés au cours des opérations de clonage. Vous devez également appeler la méthode Clone de la classe de base afin que les propriétés de cette classe de base soient copiées dans la nouvelle cellule.

L'exemple de code suivant crée un Windows Form contenant DataGridView et un ensemble de boutons. Chaque étiquette de bouton décrit une opération associée à une propriété DataGridViewColumn, par exemple la permutation de la première et dernière colonne (à l'aide de la propriété DisplayIndex) ou la modification du texte d'un en-tête de colonne (à l'aide de la propriété HeaderText). Le clic sur un bouton modifie la propriété associée de DataGridViewColumn.

using System.Windows.Forms;
using System;
using System.Drawing;

public class DataGridViewColumnDemo : Form
{
    #region "set up form"
    public DataGridViewColumnDemo()
    {
        InitializeComponent();

        AddButton(Button1, "Reset",
            new EventHandler(ResetToDisorder));
        AddButton(Button2, "Change Column 3 Header",
            new EventHandler(ChangeColumn3Header));
        AddButton(Button3, "Change Meatloaf Recipe",
            new EventHandler(ChangeMeatloafRecipe));
        AddAdditionalButtons();

        InitializeDataGridView();
    }

    DataGridView dataGridView;
    Button Button1 = new Button();
    Button Button2 = new Button();
    Button Button3 = new Button();
    Button Button4 = new Button();
    Button Button5 = new Button();
    Button Button6 = new Button();
    Button Button7 = new Button();
    Button Button8 = new Button();
    Button Button9 = new Button();
    Button Button10 = new Button();
    FlowLayoutPanel FlowLayoutPanel1 = new FlowLayoutPanel();

    private void InitializeComponent()
    {
        FlowLayoutPanel1.Location = new Point(454, 0);
        FlowLayoutPanel1.AutoSize = true;
        FlowLayoutPanel1.FlowDirection = FlowDirection.TopDown;
        FlowLayoutPanel1.Name = "flowlayoutpanel";
        ClientSize = new System.Drawing.Size(614, 360);
        Controls.Add(this.FlowLayoutPanel1);
        Text = this.GetType().Name;
        AutoSize = true;
    }
    #endregion

    #region "set up DataGridView"

    private string thirdColumnHeader = "Main Ingredients";
    private string boringMeatloaf = "ground beef";
    private string boringMeatloafRanking = "*";
    private bool boringRecipe;
    private bool shortMode;

    private void InitializeDataGridView()
    {
        dataGridView = new System.Windows.Forms.DataGridView();
        Controls.Add(dataGridView);
        dataGridView.Size = new Size(300, 200);

        // Create an unbound DataGridView by declaring a
        // column count.
        dataGridView.ColumnCount = 4;
        AdjustDataGridViewSizing();

        // Set the column header style.
        DataGridViewCellStyle columnHeaderStyle =
            new DataGridViewCellStyle();
        columnHeaderStyle.BackColor = Color.Aqua;
        columnHeaderStyle.Font =
            new Font("Verdana", 10, FontStyle.Bold);
        dataGridView.ColumnHeadersDefaultCellStyle =
            columnHeaderStyle;

        // Set the column header names.
        dataGridView.Columns[0].Name = "Recipe";
        dataGridView.Columns[1].Name = "Category";
        dataGridView.Columns[2].Name = thirdColumnHeader;
        dataGridView.Columns[3].Name = "Rating";

        PostColumnCreation();

        // Populate the rows.
        string[] row1 = new string[]{"Meatloaf", 
                                        "Main Dish", boringMeatloaf, boringMeatloafRanking};
        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)
        {
            dataGridView.Rows.Add(rowArray);
        }

        shortMode = false;
        boringRecipe = true;
    }

    private void AddButton(Button button, string buttonLabel,
        EventHandler handler)
    {
        FlowLayoutPanel1.Controls.Add(button);
        button.TabIndex = FlowLayoutPanel1.Controls.Count;
        button.Text = buttonLabel;
        button.AutoSize = true;
        button.Click += handler;
    }

    private void ResetToDisorder(object sender, System.EventArgs e)
    {
        Controls.Remove(dataGridView);
        dataGridView.Dispose();
        InitializeDataGridView();
    }

    private void ChangeColumn3Header(object sender,
        System.EventArgs e)
    {
        Toggle(ref shortMode);
        if (shortMode)
        { dataGridView.Columns[2].HeaderText = "S"; }
        else
        { dataGridView.Columns[2].HeaderText = thirdColumnHeader; }
    }

    private static void Toggle(ref bool toggleThis)
    {
        toggleThis = !toggleThis;
    }

    private void ChangeMeatloafRecipe(object sender,
        System.EventArgs e)
    {
        Toggle(ref boringRecipe);
        if (boringRecipe)
        {
            SetMeatloaf(boringMeatloaf, boringMeatloafRanking);
        }
        else
        {
            string greatMeatloafRecipe =
                "1 lb. lean ground beef, " +
                "1/2 cup bread crumbs, 1/4 cup ketchup," +
                "1/3 tsp onion powder, " +
                "1 clove of garlic, 1/2 pack onion soup mix " +
                " dash of your favorite BBQ Sauce";
            SetMeatloaf(greatMeatloafRecipe, "***");
        }
    }

    private void SetMeatloaf(string recipe, string rating)
    {
        dataGridView.Rows[0].Cells[2].Value = recipe;
        dataGridView.Rows[0].Cells[3].Value = rating;
    }
    #endregion

    #region "demonstration code"
    private void PostColumnCreation()
    {
        AddContextLabel();
        AddCriteriaLabel();
        CustomizeCellsInThirdColumn();
        AddContextMenu();
        SetDefaultCellInFirstColumn();
        ToolTips();

        dataGridView.CellMouseEnter +=
            dataGridView_CellMouseEnter;
        dataGridView.AutoSizeColumnModeChanged +=
            dataGridView_AutoSizeColumnModeChanged;
    }

    private string criteriaLabel = "Column 3 sizing criteria: ";
    private void AddCriteriaLabel()
    {
        AddLabelToPanelIfNotAlreadyThere(criteriaLabel,
            criteriaLabel +
            dataGridView.Columns[2].AutoSizeMode.ToString() +
            ".");
    }

    private void AddContextLabel()
    {
        string labelName = "label";
        AddLabelToPanelIfNotAlreadyThere(labelName,
            "Use shortcut menu to change cell color.");
    }

    private void AddLabelToPanelIfNotAlreadyThere(
        string labelName, string labelText)
    {
        Label label;
        if (FlowLayoutPanel1.Controls[labelName] == null)
        {
            label = new Label();
            label.AutoSize = true;
            label.Name = labelName;
            label.BackColor = Color.Bisque;
            FlowLayoutPanel1.Controls.Add(label);
        }
        else
        {
            label = (Label)FlowLayoutPanel1.Controls[labelName];
        }
        label.Text = labelText;
    }

    private void CustomizeCellsInThirdColumn()
    {
        int thirdColumn = 2;
        DataGridViewColumn column =
            dataGridView.Columns[thirdColumn];
        DataGridViewCell cell = new DataGridViewTextBoxCell();

        cell.Style.BackColor = Color.Wheat;
        column.CellTemplate = cell;
    }

    ToolStripMenuItem toolStripItem1 = new ToolStripMenuItem();

    private void AddContextMenu()
    {
        toolStripItem1.Text = "Redden";
        toolStripItem1.Click += new EventHandler(toolStripItem1_Click);
        ContextMenuStrip strip = new ContextMenuStrip();
        foreach (DataGridViewColumn column in dataGridView.Columns)
        {

            column.ContextMenuStrip = strip;
            column.ContextMenuStrip.Items.Add(toolStripItem1);
        }
    }

    private DataGridViewCellEventArgs mouseLocation;

    // Change the cell's color.
    private void toolStripItem1_Click(object sender, EventArgs args)
    {
        dataGridView.Rows[mouseLocation.RowIndex]
            .Cells[mouseLocation.ColumnIndex].Style.BackColor
            = Color.Red;
    }

    // Deal with hovering over a cell.
    private void dataGridView_CellMouseEnter(object sender,
        DataGridViewCellEventArgs location)
    {
        mouseLocation = location;
    }

    private void SetDefaultCellInFirstColumn()
    {
        DataGridViewColumn firstColumn = dataGridView.Columns[0];
        DataGridViewCellStyle cellStyle =
            new DataGridViewCellStyle();
        cellStyle.BackColor = Color.Thistle;

        firstColumn.DefaultCellStyle = cellStyle;
    }


    private void ToolTips()
    {
        DataGridViewColumn firstColumn = dataGridView.Columns[0];
        DataGridViewColumn thirdColumn = dataGridView.Columns[2];
        firstColumn.ToolTipText =
            "This column uses a default cell.";
        thirdColumn.ToolTipText =
            "This column uses a template cell." +
            " Style changes to one cell apply to all cells.";
    }

    private void AddAdditionalButtons()
    {
        AddButton(Button4, "Set Minimum Width of Column Two",
            new EventHandler(Button4_Click));
        AddButton(Button5, "Set Width of Column One",
            new EventHandler(Button5_Click));
        AddButton(Button6, "Autosize Third Column",
            new EventHandler(Button6_Click));
        AddButton(Button7, "Add Thick Vertical Edge",
            new EventHandler(Button7_Click));
        AddButton(Button8, "Style and Number Columns",
            new EventHandler(Button8_Click));
        AddButton(Button9, "Change Column Header Text",
            new EventHandler(Button9_Click));
        AddButton(Button10, "Swap First and Last Columns",
            new EventHandler(Button10_Click));
    }

    private void AdjustDataGridViewSizing()
    {
        dataGridView.ColumnHeadersHeightSizeMode = 
            DataGridViewColumnHeadersHeightSizeMode.AutoSize;
    }

    //Set the minimum width.
    private void Button4_Click(object sender,
        System.EventArgs e)
    {
        DataGridViewColumn column = dataGridView.Columns[1];
        column.MinimumWidth = 40;
    }

    // Set the width.
    private void Button5_Click(object sender, System.EventArgs e)
    {
        DataGridViewColumn column = dataGridView.Columns[0];
        column.Width = 60;
    }


    // AutoSize the third column.
    private void Button6_Click(object sender,
        System.EventArgs e)
    {
        DataGridViewColumn column = dataGridView.Columns[2];
        column.AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
    }

    // Set the vertical edge.
    private void Button7_Click(object sender,
        System.EventArgs e)
    {
        int thirdColumn = 2;
        DataGridViewColumn column =
            dataGridView.Columns[thirdColumn];
        column.DividerWidth = 10;
    }

    // Style and number columns.
    private void Button8_Click(object sender,
        EventArgs args)
    {
        DataGridViewCellStyle style = new DataGridViewCellStyle();
        style.Alignment =
            DataGridViewContentAlignment.MiddleCenter;
        style.ForeColor = Color.IndianRed;
        style.BackColor = Color.Ivory;

        foreach (DataGridViewColumn column in dataGridView.Columns)
        {
            column.HeaderCell.Value = column.Index.ToString();
            column.HeaderCell.Style = style;
        }
    }

    // Change the text in the column header.
    private void Button9_Click(object sender,
        EventArgs args)
    {
        foreach (DataGridViewColumn column in dataGridView.Columns)
        {

            column.HeaderText = String.Concat("Column ",
                column.Index.ToString());
        }
    }

    // Swap the last column with the first.
    private void Button10_Click(object sender, EventArgs args)
    {
        DataGridViewColumnCollection columnCollection = dataGridView.Columns;

        DataGridViewColumn firstVisibleColumn =
            columnCollection.GetFirstColumn(DataGridViewElementStates.Visible);
        DataGridViewColumn lastVisibleColumn =
            columnCollection.GetLastColumn(
                DataGridViewElementStates.Visible, DataGridViewElementStates.None);

        int firstColumn_sIndex = firstVisibleColumn.DisplayIndex;
        firstVisibleColumn.DisplayIndex = lastVisibleColumn.DisplayIndex;
        lastVisibleColumn.DisplayIndex = firstColumn_sIndex;
    }

    // Updated the criteria label.
    private void dataGridView_AutoSizeColumnModeChanged(object sender,
        DataGridViewAutoSizeColumnModeEventArgs args)
    {
        args.Column.DataGridView.Parent.
            Controls["flowlayoutpanel"].Controls[criteriaLabel].
            Text = criteriaLabel
            + args.Column.AutoSizeMode.ToString();
    }
    #endregion

    [STAThreadAttribute()]
    public static void Main()
    {
        Application.Run(new DataGridViewColumnDemo());
    }

}

Les membres statiques publics (Shared en Visual Basic) de ce type sont thread-safe. Il n'est pas garanti que les membres d'instance soient thread-safe.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile pour Pocket PC, Windows Mobile pour Smartphone, Windows Server 2003, Windows XP Édition Media Center, Windows XP Professionnel Édition x64, Windows XP SP2, Windows XP Starter Edition

Microsoft .NET Framework 3.0 est pris en charge sur Windows Vista, Microsoft Windows XP SP2 et Windows Server 2003 SP1.

.NET Framework

Prise en charge dans : 3.0, 2.0
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