using System;
using System.Data;
using System.ComponentModel;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace MitApp.WebTest
{
    [ToolboxData("<{0}:TestGrid runat=server></{0}:TestGrid>")]
    public partial class TestGrid : System.Web.UI.UserControl
    {
        // *********************************************************************
        // *** Dichiarazione Eventi
        // *********************************************************************

        /// <summary>Aggiunge un record al gridview</summary>
        [Browsable(true)]
        public event EventHandler<ImageClickEventArgs> RowAdding;

        [Browsable(true)]
        public event EventHandler<GridViewCancelEditEventArgs> RowCancelingEdit;

        [Browsable(true)]
        public event EventHandler<GridViewDeleteEventArgs> RowDeleting;

        [Browsable(true)]
        public event EventHandler<GridViewEditEventArgs> RowEditing;

        [Browsable(true)]
        public event EventHandler<GridViewPageEventArgs> PageIndexChanging;

        [Browsable(true)]
        public event EventHandler<GridViewUpdateEventArgs> RowUpdating;

        // *********************************************************************
        // *** Proprietà
        // *********************************************************************

        [Browsable(true)]
        [DefaultValue(false)]
        public bool AllowPaging 
        {
            get
            {
                return Grid.AllowPaging;
            }
            set
            {
                Grid.AllowPaging = value;
            }
        }

        public object DataSource
        {
            get
            {
                return Grid.DataSource;
            }
            set
            {
                if (Grid != null)
                    Grid.DataSource = value;
            }
        }

        public int EditIndex
        {
            get
            {
                return Grid.EditIndex; 
            }
            set
            {
                Grid.EditIndex = value;
            }
        }

        public GridViewRow FooterRow
        {
            get
            {
                return Grid.FooterRow;
            }
        }

        /// <summary>Ritorna l'istanza dell'oggetto GridView</summary>
        public GridView Grid
        {
            get
            {
                return gridView;
            }
        }

        public int PageCount
        {
            get
            {
                return Grid.PageCount;
            }
        }

        public int PageIndex
        {
            get 
            { 
                return Grid.PageIndex; 
            }
            set 
            { 
                Grid.PageIndex = value; 
            }
        }

        /// <summary>Indica se visualizzare il pulsante di aggiunta record</summary>
        [Browsable(true)]
        [DefaultValue(true)]
        public bool ShowInsertButton { get; set; }

        // *********************************************************************
        // *** Indicizzatori
        // *********************************************************************

        /// <summary>Ritorna la riga i-esima del GridView</summary>
        /// <param name="i">Indice della riga</param>
        /// <returns>GridViewRow</returns>
        public GridViewRow this[int i]
        {
            get 
            {
                return (Grid != null)
                    ? Grid.Rows[i]
                    : null;
            }
        }

        // *********************************************************************
        // *** Eventi Page
        // *********************************************************************

        protected void Page_Load(object sender, EventArgs e)
        {
            if (Grid != null)
            {
                Grid.RowCancelingEdit += new GridViewCancelEditEventHandler(OnRowCancelingEdit);
                Grid.RowDeleting += new GridViewDeleteEventHandler(OnRowDeleting);
                Grid.RowEditing += new GridViewEditEventHandler(OnRowEditing);
                Grid.PageIndexChanging += new GridViewPageEventHandler(OnPageIndexChanging);
                Grid.RowUpdating += new GridViewUpdateEventHandler(OnRowUpdating);
            }
        }

        // *********************************************************************
        // *** Eventi
        // *********************************************************************

        protected void OnRowAdding(object sender, ImageClickEventArgs e)
        {
            if (RowAdding != null)
                RowAdding(this, e);
        }

        protected void OnRowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        {
            if (RowCancelingEdit != null)
                RowCancelingEdit(this, e);
        }

        protected void OnRowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            if (RowDeleting != null)
                RowDeleting(this, e);
        }

        protected void OnRowEditing(object sender, GridViewEditEventArgs e)
        {
            if (RowEditing != null)
                RowEditing(this, e);
        }

        protected void OnPageIndexChanging(object sender, GridViewPageEventArgs e)
        {
            if (PageIndexChanging != null)
                PageIndexChanging(this, e);
        }

        protected void OnRowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            if (RowUpdating != null)
                RowUpdating(this, e);
        }

        protected void gridView_RowCreated(object sender, GridViewRowEventArgs e)
        {
            if ((e.Row.RowType == DataControlRowType.Footer) && (ShowInsertButton))
            {
                ImageButton ImageBtnAdd = new ImageButton();
                ImageBtnAdd.ID = "ImageBtnAdd";
                ImageBtnAdd.ImageUrl = "~/Images/Document/Insert.gif";
                ImageBtnAdd.OnClientClick = "return confirm('Sei sicuro di voler aggiungere il record?')";

                manager.RegisterAsyncPostBackControl(ImageBtnAdd);
                e.Row.Cells[0].Controls.Add(ImageBtnAdd);
                ImageBtnAdd.Click += new ImageClickEventHandler(OnRowAdding);

                ScriptManager.GetCurrent(this.Page).RegisterAsyncPostBackControl(ImageBtnAdd);
            }
        }

        protected void gridView_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if ((e.Row.RowType == DataControlRowType.Footer) && (ShowInsertButton))
            {
                DataTable rs = DataSource as DataTable;
                if (rs != null)
                {
                    for (int i = 0; i < rs.Columns.Count; i++)
                    {
                        DataColumn dc = rs.Columns[i];
                        TextBox txt = new TextBox();
                        txt.ID = "txt" + dc.ColumnName;
                        txt.Width = new Unit(100, UnitType.Percentage);
                        txt.ReadOnly = dc.AutoIncrement;
                        e.Row.Cells[i + 2].Controls.Add(txt);
                    }
                }
            }
        }

        // *********************************************************************
        // *** Metodi
        // *********************************************************************

        new public void DataBind()
        {
            if (Grid != null)
                Grid.DataBind();
        }
    }
}

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="TestGrid.ascx.cs" Inherits="MitApp.WebTest.TestGrid" %>

<%@ Register Src="~/UI/GridViewPager.ascx" TagName="GridViewPager" TagPrefix="asp" %>

<asp:ScriptManager runat="server" id="manager" /> 
<asp:UpdatePanel ID="updateGrid" runat="server">
    <ContentTemplate>
        <asp:GridView   ID="gridView"
                        runat="server" 
                        Width="100%"
                        ShowFooter="True" 
                        BackColor="White" 
                        BorderColor="#3366CC" 
                        BorderStyle="None" 
                        BorderWidth="1px" 
                        CellPadding="4"
                        onrowcreated="gridView_RowCreated" 
                        onrowdatabound="gridView_RowDataBound">
            <AlternatingRowStyle BackColor="#C2D69B" />
            <FooterStyle    BackColor="#99CCCC" 
                            ForeColor="#003399" />
            <HeaderStyle    BackColor="#003399" 
                            Font-Bold="True" 
                            ForeColor="#CCCCFF" />
            <PagerSettings Mode="NumericFirstLast" />
            <PagerStyle BackColor="#99CCCC" 
                        ForeColor="#003399" 
                        HorizontalAlign="center" 
                        Font-Size="Larger" />
            <RowStyle BackColor="White" ForeColor="#003399" />
            <SelectedRowStyle   BackColor="#009999" 
                                Font-Bold="True" 
                                ForeColor="#CCFF99" />
            <SortedAscendingCellStyle BackColor="#EDF6F6" />
            <SortedAscendingHeaderStyle BackColor="#0D4AC4" />
            <SortedDescendingCellStyle BackColor="#D6DFDF" />
            <SortedDescendingHeaderStyle BackColor="#002876" />
            <Columns>
                <asp:CommandField   ButtonType="Image" 
                                    ShowEditButton="True" 
                                    CancelImageUrl="~/Images/Cursor/Cancel.gif" 
                                    DeleteImageUrl="~/Images/Strumenti/Delete.gif" 
                                    EditImageUrl="~/Images/Document/Edit.gif" 
                                    UpdateImageUrl="~/Images/Cursor/Update.gif" />
                <asp:CommandField   ButtonType="Image" 
                                    ShowDeleteButton="True" 
                                    DeleteImageUrl="~/Images/Strumenti/Delete.gif" />
            </Columns>
            <PagerTemplate>
                <asp:GridViewPager ID="pager" runat="Server" />
            </PagerTemplate>
        </asp:GridView>
    </ContentTemplate>
</asp:UpdatePanel>