Bootstrap List Group with Badges in Repeater ASP.Net

By Unknown - Thursday, September 24, 2015 - No Comments

(Bootstrap List Group with Badges in ASP.Net) – Bài viết dưới đây sẽ hướng dẫn cách sử dụng Bootstrap List Group kết hợp với Badges và Repeater ASP.Net để tạo danh sách. Danh sách được lấy từ bảng Categories trong CSDL Northwind, chương trình sẽ sử dụng Badges để hiển thị số liệu thống kê tổng số sản phẩm theo từng loại.

- B1: Download CSDL Northwind tại đây và thực hiện công việc Restore Data.

- B2: Tạo Project trong Microsoft Visual Studio 2010

Trong Visual Studio tạo 1 Class có tên: Utility và nhập đoạn Code phía dưới cho Class này.

C# Code

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Data.SqlClient;

using System.Data;

using System.Configuration;

namespace BootstrapListGroups

{

public class SqlDataProvider

{

#region "Membres Prives"

private string _connectionString;

#endregion

#region "Constructeurs"

public SqlDataProvider()

{

try

{

_connectionString = ConfigurationManager.ConnectionStrings["SiteSqlServer"].ConnectionString;

}

catch

{

}

#endregion

#region "Proprietes"

public string ConnectionString

{

get { return _connectionString; }

}

#endregion

#region "Functions"

public DataTable FillTable(string sql)

{

try

{

DataTable tb = new DataTable();

SqlDataAdapter adap = new SqlDataAdapter(sql, _connectionString);

adap.Fill(tb);

return tb;

}

catch

{

return null;

}

#endregion

}

VB.NET Code

Imports System.Data.SqlClient

Imports System.Data

Namespace BootstrapListGroups

Public Class SqlDataProvider

#Region "Membres Prives"

Shared _IsError As Boolean = False

Private _connectionString As String

#End Region

#Region "Constructeurs"

Public Sub New()

Try

_connectionString = ConfigurationManager.ConnectionStrings("SiteSqlServer").ConnectionString

_IsError = False

Catch ex As Exception

_IsError = True

End Try

End Sub

#End Region

#Region "Proprietes"

Public ReadOnly Property ConnectionString() As String

Get

Return _connectionString

End Get

End Property

#End Region

#Region "Functions"

Public Function FillTable(ByVal sql As String) As DataTable

Try

Dim tb As New DataTable

Dim adap As New SqlDataAdapter(sql, _connectionString)

adap.Fill(tb)

Return tb

Catch ex As Exception

Return Nothing

End Try

End Function

#End Region

End Class

End Namespace

Chú ý: Thuộc tính SiteSqlServer chính là chuỗi Connect với SQL Server trong file Web.Config

- B3: Mở file Site.Master dạng HTML và bổ xung đoạn mã phía dưới trong thẻ Head

<title>Bootstrap List Group with Badges in Repeater ASP.Net</title>

<asp:ContentPlaceHolder ID="HeadContent" runat="server">

</asp:ContentPlaceHolder>

</head>

- B4: Mở file Default.aspx dưới dạng HTML và nhập mã HTML

C# Code

<%@ Page Title="Bootstrap List Group with Badges in Repeater ASP.Net" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="BootstrapListGroups._Default" %>

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">

</asp:Content>

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">

<h4>Bootstrap List Group with Badges in Repeater ASP.Net</h4>

</div>

<asp:Repeater ID="rptList" OnItemDataBound="rptList_ItemDataBound" runat="server">

</ItemTemplate>

</asp:Repeater>

</div>

</asp:Content>

- B5: Viết Code cho file Default.aspx

C# Code

//Visit http://www.laptrinhdotnet.com for more ASP.NET Tutorials

using Microsoft.VisualBasic;

using System;

using System.Collections;

using System.Collections.Generic;

using System.Data;

using System.IO;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls;

namespace BootstrapListGroups

{

public partial class _Default : System.Web.UI.Page

{

#region "Repeater Methods"

protected void rptList_ItemDataBound(object sender, System.Web.UI.WebControls.RepeaterItemEventArgs e)

{

if (e.Item.ItemType == ListItemType.Item | e.Item.ItemType == ListItemType.AlternatingItem)

{

int TotalProducts =Convert.ToInt32(DataBinder.Eval(e.Item.DataItem, "TotalProducts"));

HtmlAnchor AnchorItem = (HtmlAnchor)e.Item.FindControl("AnchorItem");

if ((AnchorItem != null))

{

AnchorItem.Controls.Add(new LiteralControl("<span class=\"badge\">"));

AnchorItem.Controls.Add(new LiteralControl(TotalProducts.ToString()));

AnchorItem.Controls.Add(new LiteralControl("</span>"));

}

#endregion

#region "Bind Data"

private void BindData()

{

SqlDataProvider objSQL = new SqlDataProvider();

DataTable objBind = default(DataTable);

//Caching

if (Cache["Cache_Categories"] == null)

{

objBind = objSQL.FillTable("SELECT Products.CategoryID, Categories.CategoryName, COUNT(Products.ProductID) AS TotalProducts FROM Products INNER JOIN Categories ON Products.CategoryID = Categories.CategoryID GROUP BY Products.CategoryID, Categories.CategoryName ORDER BY Categories.CategoryName");

Cache["Cache_Categories"] = objBind;

}

else

{

objBind = (DataTable)Cache["Cache_Categories"];

}

if (objBind != null)

{

if (objBind.Rows.Count > 0)

{

rptList.DataSource = objBind;

rptList.DataBind();

}

#endregion

#region "Event Handles"

protected void Page_Load(object sender, System.EventArgs e)

{

try

{

if (!IsPostBack)

{

BindData();

}

catch

{

}

#endregion

}

VB.NET Code

'Visit http://www.laptrinhdotnet.com for more ASP.NET Tutorials

Imports System.IO

Namespace BootstrapListGroups

Public Class _Default

Inherits System.Web.UI.Page

#Region "Repeater Methods"

Private Sub rptList_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles rptList.ItemDataBound

If (e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem) Then

Dim TotalProducts As Integer = DataBinder.Eval(e.Item.DataItem, "TotalProducts")

Dim AnchorItem As HtmlAnchor = DirectCast(e.Item.FindControl("AnchorItem"), HtmlAnchor)

If Not AnchorItem Is Nothing Then

AnchorItem.Controls.Add(New LiteralControl("<span class=""badge"">"))

AnchorItem.Controls.Add(New LiteralControl(TotalProducts))

AnchorItem.Controls.Add(New LiteralControl("</span>"))

End If

End Sub

#End Region

#Region "Bind Data"

Private Sub BindData()

Dim objSQL As New SqlDataProvider

Dim objBind As DataTable

'Caching

If Cache("Cache_Categories") Is Nothing Then

Cache("Cache_Categories") = objBind

Else

objBind = CType(Cache("Cache_Categories"), DataTable)

End If

If Not objBind Is Nothing Then

If objBind.Rows.Count > 0 Then

rptList.DataSource = objBind

rptList.DataBind()

End If

End Sub

#End Region

#Region "Event Handles"

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

Try

If Page.IsPostBack = False Then

BindData()

End If

Catch ex As Exception

End Try

End Sub

#End Region

End Class

End Namespace

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