Discussion :

[tendre_amie007]

Bonjour
j'essaie d'afficher les colones de ma source de données d'une façon dynamique à partir de la classe suivante:

Code :

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections.Specialized;
using System.Data.SqlClient;
 
public class DynamicallyTemplatedGridViewHandler : ITemplate
{
    #region data memebers
 
    ListItemType ItemType;
    string FieldName;
    string InfoType;
 
    #endregion
 
    #region constructor
 
    public DynamicallyTemplatedGridViewHandler(ListItemType item_type, string field_name, string info_type)
    {
        ItemType = item_type;
        FieldName = field_name;
        InfoType = info_type;
    }
 
    #endregion
 
    #region Methods
 
    public void InstantiateIn(System.Web.UI.Control Container)
    {
        switch (ItemType)
        {
            case ListItemType.Header:
                Literal header_ltrl = new Literal();
                header_ltrl.Text = "<b>" + FieldName + "</b>";
                Container.Controls.Add(header_ltrl);
                break;
 
            case ListItemType.Item:
                switch (InfoType)
                {
                    case "Command":
                        ImageButton edit_button = new ImageButton();
                        edit_button.ID = "edit_button";
                        edit_button.ImageUrl = "~/Commun/Images/edit_small.png";
                        edit_button.CommandName = "Edit";
                        edit_button.Click += new ImageClickEventHandler(edit_button_Click);
                        edit_button.ToolTip = "Edit";
                        Container.Controls.Add(edit_button);
 
                        ImageButton delete_button = new ImageButton();
                        delete_button.ID = "delete_button";
                        delete_button.ImageUrl = "~/Commun/Images/delete2.png";
                        delete_button.CommandName = "Delete";
                        delete_button.ToolTip = "Delete";
                        //delete_button.OnClientClick = "return confirm('Are you sure to delete the record?')";
                        Container.Controls.Add(delete_button);
 
                        /* Similarly add button for insert.
                         * It is important to know when 'insert' button is added 
                         * its CommandName is set to "Edit"  like that of 'edit' button 
                         * only because we want the GridView enter into Edit mode, 
                         * and this time we also want the text boxes for corresponding fields empty*/
                        ImageButton insert_button = new ImageButton();
                        insert_button.ID = "insert_button";
                        insert_button.ImageUrl = "~/Commun/Images/add2.png";
                        insert_button.CommandName = "Edit";
                        insert_button.ToolTip = "Insert";
                        insert_button.Click += new ImageClickEventHandler(insert_button_Click);
                        Container.Controls.Add(insert_button);
 
                        break;
 
                    default:
                        Label field_lbl = new Label();
                        field_lbl.Text = String.Empty; //we will bind it later through 'OnDataBinding' event
                        field_lbl.DataBinding += new EventHandler(OnDataBinding);
                        Container.Controls.Add(field_lbl);
                        break;
 
                }
                break;
            case ListItemType.EditItem:
                if (InfoType == "Command")
                {
                    ImageButton update_button = new ImageButton();
                    update_button.ID = "update_button";
                    update_button.CommandName = "Update";
                    update_button.ImageUrl = "~/images/update.gif";
                    if ((int)new Page().Session["InsertFlag"] == 1)
                        update_button.ToolTip = "Add";
                    else
                    update_button.ToolTip = "Update";
                    //update_button.OnClientClick = "return confirm('Are you sure to update the record?')";
                    Container.Controls.Add(update_button);
 
                    ImageButton cancel_button = new ImageButton();
                    cancel_button.ImageUrl = "~/images/cancel.gif";
                    cancel_button.ID = "cancel_button";
                    cancel_button.CommandName = "Cancel";
                    cancel_button.ToolTip = "Cancel";
                    Container.Controls.Add(cancel_button);
 
                }
                else// for other 'non-command' i.e. the key and non key fields, bind textboxes with corresponding field values
                {
                    TextBox field_txtbox = new TextBox();
                    field_txtbox.Text = String.Empty;
                     //if Inert is intended no need to bind it with text..keep them empty
                    if ((int)new Page().Session["InsertFlag"] == (int)EnumInsertFlag.Edit)
                    field_txtbox.DataBinding += new EventHandler(OnDataBinding);
                    Container.Controls.Add(field_txtbox);
 
                }
                break;
            case ListItemType.Footer:
                if(InfoType!="Command")
                {
                    TextBox MonTextBox = new TextBox();
                    MonTextBox.Text = String.Empty;
                    Container.Controls.Add(MonTextBox);
                }
                break;
        }
    }
 
    #endregion
 
    #region Event Handlers
 
    //just sets the insert flag ON so that we ll be able to decide in OnRowUpdating event whether to insert or update
    protected void insert_button_Click(Object sender,ImageClickEventArgs e)
    {
        new Page().Session["InsertFlag"] = (int)EnumInsertFlag.Insert;
    }
    //just sets the insert flag OFF so that we ll be able to decide in OnRowUpdating event whether to insert or update 
    protected void edit_button_Click(Object sender, ImageClickEventArgs e)
    {
        new Page().Session["InsertFlag"] = (int)EnumInsertFlag.Edit;
    }
 
    private void OnDataBinding(object sender, EventArgs e)
    {
 
        object bound_value_obj = null;
        Control ctrl = (Control)sender;
        IDataItemContainer data_item_container = (IDataItemContainer)ctrl.NamingContainer;
        bound_value_obj = DataBinder.Eval(data_item_container.DataItem, FieldName);
 
        switch (ItemType)
        {
            case ListItemType.Item:
                Label field_ltrl = (Label)sender;
                field_ltrl.Text = bound_value_obj.ToString();
 
                break;
            case ListItemType.EditItem:
                TextBox field_txtbox = (TextBox)sender;
                field_txtbox.Text = bound_value_obj.ToString();
 
                break;
        }
    }
 
    #endregion
 
 
}

pour l'affichage ce code marche à merveille mais qand j'édite ,les données ne s'affiche plus comme si la grille n'est plus Bind(é) ,voici le code Behind de ma page

Code :

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protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            ChargerGrilleMoyensFinanciers();
            LoadListeMoyensFinancier();
        }
    }
    private void LoadListeMoyensFinancier()
    {
        UmsProjet ProjetCourant = MonProjetService.RechercherProjetParId(IdProjet);
        DataSet1 MonDataSet = MonMoyenFinancierService.RecupererGrilleMoyenFinancier(ProjetCourant);
        ListeMoyensFinanciers.DataSource = MonDataSet.maTable;
        ListeMoyensFinanciers.DataBind();
        IList<UmsRubriqueBudgetaire> MesRubriquesBudgetaires = MaRubriqueBudgetService.Tout();
        DropDownList FooterListe = (DropDownList)ListeMoyensFinanciers.FooterRow.FindControl("ListeRubriquesBudgetaires");
        FooterListe.DataSource = MesRubriquesBudgetaires;
        FooterListe.DataBind();
    }
 
    private void ChargerGrilleMoyensFinanciers()
    {
        UmsProjet ProjetCourant = MonProjetService.RechercherProjetParId(IdProjet);
        DataSet1 MonDataSet = MonMoyenFinancierService.RecupererGrilleMoyenFinancier(ProjetCourant);
        DataTable UneTable = MonDataSet.maTable;
        //ListeMoyensFinanciers.Columns.Clear();
 
        foreach (DataColumn Column in UneTable.Columns)
        {
            if (Column.ColumnName != "Id" & Column.ColumnName!="Designation")
            {
                TemplateField MyColumnTemplate = new TemplateField();
                MyColumnTemplate.HeaderText = Column.ColumnName;
                MyColumnTemplate.ItemTemplate = new DynamicallyTemplatedGridViewHandler(ListItemType.Item, Column.ColumnName, UneTable.Columns[Column.ColumnName].DataType.Name);
                MyColumnTemplate.EditItemTemplate = new DynamicallyTemplatedGridViewHandler(ListItemType.EditItem, Column.ColumnName, UneTable.Columns[Column.ColumnName].DataType.Name);
                MyColumnTemplate.FooterTemplate = new DynamicallyTemplatedGridViewHandler(ListItemType.Footer, Column.ColumnName, UneTable.Columns[Column.ColumnName].DataType.Name);
                ListeMoyensFinanciers.Columns.Add(MyColumnTemplate);
            }
        }
        TemplateField MyButton = new TemplateField();
        MyButton.ItemTemplate = new DynamicallyTemplatedGridViewHandler(ListItemType.Item, "CRUD", "Command");
        MyButton.EditItemTemplate = new DynamicallyTemplatedGridViewHandler(ListItemType.EditItem, "INSERT", "Command");
        ListeMoyensFinanciers.Columns.Add(MyButton);
    }
 
    public void Editer_MoyenFinancier(object sender,GridViewEditEventArgs e)
    {
        int RowIndex = e.NewEditIndex;
        ListeMoyensFinanciers.EditIndex = RowIndex;
        ListeMoyensFinanciers.Rows[RowIndex].RowState = DataControlRowState.Edit;
        ListeMoyensFinanciers.DataBind();
        Session["SelecetdRowIndex"] = e.NewEditIndex;
 
    }
    public void Supprimer_MoyenFinancier(object sender, GridViewDeleteEventArgs e)
    {
        ChargerGrilleMoyensFinanciers();
    }
    public void Annuler_Editer_MoyenFinancier(object sender, GridViewCancelEditEventArgs e)
    {
        ListeMoyensFinanciers.EditIndex = -1;
        ListeMoyensFinanciers.DataBind();
        Session["SelecetdRowIndex"] = -1; 
    }
    public void MAJ_MoyenFinancier(object sender, GridViewUpdateEventArgs e)
    {
        ChargerGrilleMoyensFinanciers();
    }

je suis vraiment bloqué et j'attends vraiment vos remarques
Merci