Di chuyển thứ tự bản ghi trên Gridview trong Asp.net

By Unknown - Thursday, July 30, 2015 - No Comments

(Moving GridView Rows Up & Down in a GridView) – Khi những giá trị thường xuyên được chọn trong danh sách được sắp xếp lên đầu sẽ giúp người dùng lựa chọn dễ dàng hơn khi sử dụng. Bài viết dưới đây sẽ hướng dẫn các bạn làm 1 phần quản trị để có thể dễ dàng thay đổi thứ tự ưu tiên của các bản ghi. Và chỉ cần kích các nút Up hoặc Down là thứ tự sẽ tự động được thay đổi.

Xem những Video hay dành cho thiếu nhi - Nghe trên Youtube

- B1: Tạo CSDL SQL Customers

- B2: Tạo Bảng Categories có cấu trúc phía dưới trong CSDL SQL Server.

- B3: Nhập dữ liệu cho bảng Categories

- B4: Tạo các stored procedure trong SQL Server

CREATE PROCEDURE [dbo].[Pro_Categories_Delete]

@ItemID int

DELETE FROM Categories

WHERE

CategoryID = @ItemID

create PROCEDURE [dbo].[Pro_Categories_GetByOrder]

@SortOrder int

SELECT *

FROM Categories

WHERE SortOrder = @SortOrder

CREATE PROCEDURE [dbo].[Pro_Categories_List]

@Keyword nvarchar(250)

declare @strSQL nvarchar(1000)

declare @strWhere nvarchar(500)

declare @strOrder nvarchar (50)

set @strSQL= 'Select * from Categories'

set @strWhere =' Where 1=1 '

if @Keyword<>''

set @strWhere= @strWhere +' And (CategoryCode like N''%' +@Keyword+'%''

Or CategoryName like N''%' +@Keyword+'%''

Or Description like N''%' +@Keyword+'%'')'

set @strOrder =' Order by SortOrder'

set @strSQL=@strSQL+@strWhere+@strOrder

print @strSQL

exec sp_executesql @strSQL

create procedure [dbo].[Pro_Categories_UpdateOrder]

@ItemID int,

@SortOrder int

update Categories

set

SortOrder = @SortOrder

where CategoryID = @ItemID

Bạn có thể tải về bảng cơ sở dữ liệu SQL bằng cách nhấn vào liên kết tải về dưới đây

- B5: 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 MoveRowsInGridViewUpandDown

{

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 ProcName, params ObjectPara[] Para)

{

try

{

DataTable tb = new DataTable();

SqlDataAdapter adap = new SqlDataAdapter(ProcName, _connectionString);

adap.SelectCommand.CommandType = CommandType.StoredProcedure;

if ((Para != null))

{

foreach (ObjectPara p in Para)

{

adap.SelectCommand.Parameters.Add(new SqlParameter(p.Name, p.Value));

}

adap.Fill(tb);

return tb;

}

catch

{

return null;

}

public object RunSQL(string ProcName, params ObjectPara[] Para)

{

try

{

SqlConnection _cnn = new SqlConnection(_connectionString);

_cnn.Open();

SqlCommand cmd = new SqlCommand(ProcName, _cnn);

cmd.CommandType = CommandType.StoredProcedure;

foreach (ObjectPara p in Para)

{

cmd.Parameters.Add(new SqlParameter(p.Name, p.Value));

}

int result = (Int32)cmd.ExecuteScalar();

return result;

}

catch

{

return null;

}

public DataRow GetRow(string ProcName, params ObjectPara[] Para)

{

try

{

DataTable tb = new DataTable();

SqlDataAdapter adap = new SqlDataAdapter(ProcName, _connectionString);

adap.SelectCommand.CommandType = CommandType.StoredProcedure;

foreach (ObjectPara p in Para)

{

adap.SelectCommand.Parameters.Add(new SqlParameter(p.Name, p.Value));

}

adap.Fill(tb);

if (tb.Rows != null)

{

return tb.Rows[0];

}

catch

{

return null;

}

return null;

}

#endregion

}

public class ObjectPara

{

string _name;

object _Value;

public ObjectPara(string Pname, object PValue)

{

_name = Pname;

_Value = PValue;

}

public string Name

{

get { return _name; }

set { _name = value; }

}

public object Value

{

get { return _Value; }

set { _Value = value; }

}

VB.NET Code

Imports System.Data.SqlClient

Imports System.Data

Namespace MoveRowsInGridViewUpDown

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 ProcName As String, ByVal ParamArray Para() As ObjectPara) As DataTable

Try

Dim tb As New DataTable

Dim adap As New SqlDataAdapter(ProcName, _connectionString)

adap.SelectCommand.CommandType = CommandType.StoredProcedure

If Not Para Is Nothing Then

For Each p As ObjectPara In Para

adap.SelectCommand.Parameters.Add(New SqlParameter(p.Name, p.Value))

End If

adap.Fill(tb)

Return tb

Catch ex As Exception

Return Nothing

End Try

End Function

Public Function RunSQL(ByVal ProcName As String, ByVal ParamArray Para() As ObjectPara) As Object

Try

Dim _cnn As New SqlConnection(_connectionString)

_cnn.Open()

Dim cmd As New SqlCommand(ProcName, _cnn)

cmd.CommandType = CommandType.StoredProcedure

For Each p As ObjectPara In Para

cmd.Parameters.Add(New SqlParameter(p.Name, p.Value))

Return cmd.ExecuteScalar

Catch ex As Exception

Return Nothing

End Try

End Function

Public Function GetRow(ByVal ProcName As String, ByVal ParamArray Para() As ObjectPara) As DataRow

Try

Dim tb As New DataTable

Dim adap As New SqlDataAdapter(ProcName, _connectionString)

adap.SelectCommand.CommandType = CommandType.StoredProcedure

For Each p As ObjectPara In Para

adap.SelectCommand.Parameters.Add(New SqlParameter(p.Name, p.Value))

adap.Fill(tb)

If tb.Rows.Count Then

Return tb.Rows(0)

End If

Catch ex As Exception

Return Nothing

End Try

Return Nothing

End Function

#End Region

End Class

Public Class ObjectPara

Dim _name As String

Dim _Value As Object

Sub New(ByVal Pname As String, ByVal PValue As Object)

_name = Pname

_Value = PValue

End Sub

Public Property Name() As String

Get

Return _name

End Get

Set(ByVal value As String)

_name = value

End Set

End Property

Public Property Value() As Object

Get

Return _Value

End Get

Set(ByVal value As Object)

_Value = value

End Set

End Property

End Class

End Namespace

- B6: Download các file ảnh tại đây, Copy ảnh vào thư mục Images của Project

- B7: Mở file Default.aspx dưới dạng HTML và nhập mã HTML

<%@ Page Title="How to move the rows in the GridView Up and Down in Asp.net" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="MoveRowsInGridViewUpandDown._Default" %>

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

<asp:ScriptManager ID="ScriptManager1" runat="server">

</asp:ScriptManager>

<h3>

How to move the rows in the GridView Up and Down in Asp.net

</h3>

<asp:UpdatePanel ID="updatePanel" runat="server" UpdateMode="Conditional">

<tr>

<td>

</td>

<asp:Label ID="plKeyword" runat="server" Text="Keyword"></asp:Label>

<asp:TextBox ID="txtSearch" CssClass="form-control" ToolTip="Enter Keyword" runat="server" width="200px"></asp:TextBox>

<asp:ImageButton ID="cmdQuickSearch" runat="server" causesvalidation="false" OnClick="cmdQuickSearch_Click" imageurl="~/images/icon_search.gif"></asp:ImageButton>

</td>

</tr>

<asp:Label ID="lblMessage" runat="server" Text="No Data"></asp:Label>

</td>

</tr>

<tr>

<asp:GridView ID="grvObject" runat="server" AllowPaging="true" PageSize="12"

CssClass="GridStyle" BorderColor="#cbcbcb" BorderStyle="solid"

BorderWidth="1" AutoGenerateColumns="false" DataKeyNames="CategoryID" width="100%"

OnRowCommand="grvObject_RowCommand"

OnRowDataBound="grvObject_RowDataBound">

<asp:TemplateField HeaderText = "Number">

<asp:Label ID="lblRowNumber" Text='<%# Container.DataItemIndex + 1 %>' runat="server" />

</ItemTemplate>

</asp:TemplateField>

<asp:BoundField ItemStyle-Width="8%" DataField="CategoryCode" HeaderText="CategoryCode" />

<asp:BoundField ItemStyle-Width="10%" DataField="CategoryName" HeaderText="CategoryName" />

<asp:BoundField ItemStyle-Width="25%" DataField="Description" HeaderText="Description" />

<asp:TemplateField HeaderText="Function">

<asp:ImageButton ID="cmdDelete" CommandName="Delete" CommandArgument='<%# Eval("CategoryID")%>' runat="server" ImageUrl="~/images/delete.gif" CausesValidation="False"></asp:ImageButton>

<asp:ImageButton id="cmdMoveDown" runat="server" ImageUrl="~/images/dn.gif" ToolTip="Down" CausesValidation="false" CommandName="MoveDown" CommandArgument ='<%# Eval("SortOrder")%>'></asp:ImageButton>

<asp:ImageButton id="cmdMoveUp" runat="server" ImageUrl="~/images/up.gif" ToolTip="Up" CausesValidation="false" CommandName="MoveUp" CommandArgument ='<%# Eval("SortOrder")%>'></asp:ImageButton>

</ItemTemplate>

</asp:TemplateField>

</Columns>

</asp:GridView>

</td>

</tr>

</table>

</ContentTemplate>

</asp:UpdatePanel>

</asp:Content>

- B8: 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.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls;

using System.Diagnostics;

namespace MoveRowsInGridViewUpandDown

{

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

{

#region "Private Methods"

private int iLastRow = 0;

#endregion

#region "Private Methods"

private void Delete(int ItemID)

{

SqlDataProvider objSQL = new SqlDataProvider();

objSQL.RunSQL("Pro_Categories_Delete", new ObjectPara("@ItemID", ItemID));

BindData();

}

#endregion

#region "Bind Data"

private void BindData()

{

DataTable objBind = new DataTable();

objBind = GetData(txtSearch.Text);

if (objBind != null)

{

if (objBind.Rows.Count > 0)

{

iLastRow = objBind.Rows.Count - 1;

grvObject.DataSource = objBind;

grvObject.DataBind();

trMessage.Visible = false;

grvObject.Visible = true;

}

else

{

trMessage.Visible = true;

grvObject.Visible = false;

}

updatePanel.Update();

}

private DataTable GetData(string Keyword)

{

SqlDataProvider objSQL = new SqlDataProvider();

DataTable objBind = objSQL.FillTable("Pro_Categories_List", new ObjectPara("@Keyword", Keyword.Trim()));

return objBind;

}

#endregion

#region "Order"

private void MoveProperty(int Index, int DestIndex)

{

SqlDataProvider objSQL = new SqlDataProvider();

DataRow objInfo = objSQL.GetRow("Pro_Categories_GetByOrder", new ObjectPara("@SortOrder", Index));

DataRow objDestInfo = objSQL.GetRow("Pro_Categories_GetByOrder", new ObjectPara("@SortOrder", DestIndex));

int ItemID = 0;

int Item_Dest = 0;

int OrderBy = 0;

int OrderBy_Dest = 0;

if (objInfo != null)

{

if (objInfo["CategoryID"] != null)

{

ItemID =Convert.ToInt32(objInfo["CategoryID"]);

}

if (objInfo["SortOrder"] != null)

{

OrderBy = Convert.ToInt32(objInfo["SortOrder"]);

}

if (objDestInfo != null)

{

if (objDestInfo["CategoryID"] != null)

{

Item_Dest = Convert.ToInt32(objDestInfo["CategoryID"]);

}

if (objDestInfo["SortOrder"] != null)

{

OrderBy_Dest = Convert.ToInt32(objDestInfo["SortOrder"]);

}

if (OrderBy != 0 & OrderBy_Dest != 0)

{

objSQL.RunSQL("Pro_Categories_UpdateOrder", new ObjectPara("@ItemID", Item_Dest), new ObjectPara("@SortOrder", OrderBy));

objSQL.RunSQL("Pro_Categories_UpdateOrder", new ObjectPara("@ItemID", ItemID), new ObjectPara("@SortOrder", OrderBy_Dest));

BindData();

}

private void MovePropertyDown(int index)

{

MoveProperty(index, (index + 1));

}

private void MovePropertyUp(int index)

{

MoveProperty(index, (index - 1));

}

#endregion

#region "GridView Methods"

protected void grvObject_RowCommand(object sender, System.Web.UI.WebControls.GridViewCommandEventArgs e)

{

if (!string.IsNullOrEmpty(e.CommandArgument.ToString()))

{

int ItemID = -1;

ItemID =Convert.ToInt32(e.CommandArgument);

switch (e.CommandName.ToLower())

{

case "moveup":

MovePropertyUp(ItemID);

break;

case "movedown":

MovePropertyDown(ItemID);

break;

}

protected void grvObject_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowType == DataControlRowType.DataRow)

{

int ItemID =Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "CategoryID"));

HyperLink cmdEdit = (HyperLink)e.Row.FindControl("cmdEdit");

if (cmdEdit != null)

{

cmdEdit.ToolTip = "Edit";

}

ImageButton cmdMoveDown = (ImageButton)e.Row.FindControl("cmdMoveDown");

if (cmdMoveDown != null)

{

cmdMoveDown.ToolTip = "Move Down";

if (e.Row.RowIndex == iLastRow)

{

cmdMoveDown.Visible = false;

}

ImageButton cmdMoveUp = (ImageButton)e.Row.FindControl("cmdMoveUp");

if (cmdMoveUp != null)

{

cmdMoveUp.ToolTip = "Move Up";

if (e.Row.RowIndex == 0)

{

cmdMoveUp.Visible = false;

}

ImageButton cmdDelete = (ImageButton)e.Row.FindControl("cmdDelete");

if (cmdDelete != null)

{

string sDeleteItem = "Do you want to delete this record?";

cmdDelete.Attributes.Add("onclick", ("javascript:return confirm('" + sDeleteItem + "');"));

cmdDelete.ToolTip = "Delete";

}

#endregion

#region "Event Handles"

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

{

try

{

if (!IsPostBack)

{

BindData();

}

catch

{

}

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

{

BindData();

}

#endregion

}

VB.Net Code

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

Imports System.IO

Namespace MoveRowsInGridViewUpDown

Public Class _Default

Inherits System.Web.UI.Page

#Region "Private Methods"

Private iLastRow As Integer = 0

#End Region

#Region "Private Methods"

Private Sub Delete(ByVal ItemID As Integer)

Dim objSQL As New SqlDataProvider

objSQL.RunSQL("Pro_Categories_Delete", New ObjectPara("@ItemID", ItemID))

BindData()

End Sub

#End Region

#Region "Bind Data"

Private Sub BindData()

Dim objBind As New DataTable

objBind = GetData(txtSearch.Text.Trim)

If Not objBind Is Nothing Then

If objBind.Rows.Count > 0 Then

iLastRow = objBind.Rows.Count - 1

grvObject.DataSource = objBind

grvObject.DataBind()

trMessage.Visible = False

grvObject.Visible = True

Else

trMessage.Visible = True

grvObject.Visible = False

End If

updatePanel.Update()

End If

End Sub

Private Function GetData(ByVal Keyword As String) As DataTable

Dim objSQL As New SqlDataProvider

Dim objBind As DataTable = objSQL.FillTable("Pro_Categories_List", New ObjectPara("@Keyword", Keyword.Trim))

Return objBind

End Function

#End Region

#Region "Order"

Private Sub MoveProperty(ByVal Index As Integer, ByVal DestIndex As Integer)

Dim objSQL As New SqlDataProvider

Dim objInfo As DataRow = objSQL.GetRow("Pro_Categories_GetByOrder", New ObjectPara("@SortOrder", Index))

Dim objDestInfo As DataRow = objSQL.GetRow("Pro_Categories_GetByOrder", New ObjectPara("@SortOrder", DestIndex))

Dim ItemID As Integer = 0

Dim Item_Dest As Integer = 0

Dim OrderBy As Integer = 0

Dim OrderBy_Dest As Integer = 0

If Not objInfo Is Nothing Then

If Not IsDBNull(objInfo("CategoryID")) Then

ItemID = objInfo("CategoryID")

End If

If Not IsDBNull(objInfo("SortOrder")) Then

OrderBy = objInfo("SortOrder")

End If

If Not objDestInfo Is Nothing Then

If Not IsDBNull(objDestInfo("CategoryID")) Then

Item_Dest = objDestInfo("CategoryID")

End If

If Not IsDBNull(objDestInfo("SortOrder")) Then

OrderBy_Dest = objDestInfo("SortOrder")

End If

If OrderBy <> 0 And OrderBy_Dest <> 0 Then

objSQL.RunSQL("Pro_Categories_UpdateOrder", New ObjectPara("@ItemID", Item_Dest), New ObjectPara("@SortOrder", OrderBy))

objSQL.RunSQL("Pro_Categories_UpdateOrder", New ObjectPara("@ItemID", ItemID), New ObjectPara("@SortOrder", OrderBy_Dest))

BindData()

End If

End Sub

Private Sub MovePropertyDown(ByVal index As Integer)

MoveProperty(index, (index + 1))

End Sub

Private Sub MovePropertyUp(ByVal index As Integer)

MoveProperty(index, (index - 1))

End Sub

#End Region

#Region "GridView Methods"

Private Sub grvObject_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles grvObject.RowCommand

If e.CommandArgument.ToString <> "" Then

Dim ItemID As Integer = -1

ItemID = e.CommandArgument

Select Case e.CommandName.ToLower

Case "moveup"

MovePropertyUp(ItemID)

Case "movedown"

MovePropertyDown(ItemID)

End Select

End If

End Sub

Private Sub grvObject_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs) Handles grvObject.RowDataBound

If (e.Row.RowType = DataControlRowType.DataRow) Then

Dim ItemID As Integer = DataBinder.Eval(e.Row.DataItem, "CategoryID")

Dim cmdEdit As HyperLink = CType(e.Row.FindControl("cmdEdit"), HyperLink)

If Not cmdEdit Is Nothing Then

cmdEdit.ToolTip = "Edit"

End If

Dim cmdMoveDown As ImageButton = CType(e.Row.FindControl("cmdMoveDown"), ImageButton)

If Not cmdMoveDown Is Nothing Then

cmdMoveDown.ToolTip = "Move Down"

If e.Row.RowIndex = iLastRow Then

cmdMoveDown.Visible = False

End If

Dim cmdMoveUp As ImageButton = CType(e.Row.FindControl("cmdMoveUp"), ImageButton)

If Not cmdMoveUp Is Nothing Then

cmdMoveUp.ToolTip = "Move Up"

If e.Row.RowIndex = 0 Then

cmdMoveUp.Visible = False

End If

Dim cmdDelete As ImageButton = DirectCast(e.Row.FindControl("cmdDelete"), ImageButton)

If Not cmdDelete Is Nothing Then

Dim sDeleteItem As String = "Do you want to delete this record?"

cmdDelete.Attributes.Add("onclick", ("javascript:return confirm('" & sDeleteItem & "');"))

cmdDelete.ToolTip = "Delete"

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

Private Sub cmdQuickSearch_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdQuickSearch.Click

BindData()

End Sub

#End Region

End Class

End Namespace

Bây giờ chạy Project khi cần thay đổi thứ tự loại chỉ cần kích vào các nút Down hoặc Up thì ngoài việc thay đổi vị trí hiển thị trên Gridview chương trình sẽ tự động cập nhật thứ tự trong CSDL SQL.

Chúc các bạn thành công!

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