Question

Bind Gridview to dataset using VB.NET

Asked by: Mike_Stevens

I have a datagridview that I need to bind to a dataset that contains data from a Access database table.   The datagridview needs to allow the user to edit existing data as well as add new data.   When the user is done I need to have whatever changes are made to existing data as well as the new data saved back to the database.   What is the best approach to take to acomplish this?

I am able to populate the dataset and bind it to the grid.  My problem is save the changes back to the database.

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Asked On
2009-05-06 at 10:30:42ID24385873
Tags

VB.NET

,

DatagridView

,

Dataset

Topics

Microsoft Visual Basic.Net

,

.NET Framework 3.x versions

,

Microsoft Access Database

Participating Experts
2
Points
500
Comments
2

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Answers

 

by: srikanthreddyn143Posted on 2009-05-06 at 11:58:54ID: 24318322

 

by: BMKESHAVPosted on 2009-05-08 at 02:04:54ID: 24334157

Here is an ASPX page retriving/editing/updating/deleting  data from mysql table using VB.net
Pl.make necessary correcitons at your end a/c to your environment and use :

<%@ Page Language=VB Debug=true %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="MySql.Data" %>
<%@ Import Namespace="MySql.Data.MysqlClient" %>

<script runat=server>
    Private strConnection As String = "server=192.168.1.44; user id=bmk; password=bmkpass; database=test; pooling=false;"
   
    Sub Page_Load(ByVal Sender As Object, ByVal E As EventArgs)
        If Not IsPostBack Then
            BuildDataList()
        End If
    End Sub
   
    Sub Edit_Grid(ByVal sender As Object, ByVal e As DataGridCommandEventArgs)
        dgEmps.EditItemIndex = e.Item.ItemIndex
        BuildDataList()
    End Sub

    Sub CancelEdit(ByVal Sender As Object, ByVal E As DataGridCommandEventArgs)
        dgEmps.EditItemIndex = -1
        BuildDataList()
    End Sub
   
Sub Update_Grid(ByVal Sender as Object, ByVal E as DataGridCommandEventArgs)
    Dim TheID as String
    Dim LastName as String
    Dim FirstName as String
    TheID = E.Item.Cells(2).Text
    LastName = CType(e.Item.Cells(0).Controls(0), TextBox).Text
    FirstName = CType(e.Item.Cells(1).Controls(0), TextBox).Text
        Dim DBConn As MySqlConnection
        Dim DBUpdate As New MySqlCommand
        DBConn = New MySqlConnection(strConnection)
    DBUpdate.CommandText = "Update Employee " _
        & "Set LastName = '" & LastName &"', " _
        & "FirstName = '" & FirstName & "' " _
        & "Where ID = " & TheID
       DBUpdate.Connection = DBConn
        DBUpdate.Connection.Open()
        DBUpdate.ExecuteNonQuery()
    DBConn.Close
    dgEmps.EditItemIndex = -1
    BuildDataList
End Sub
    Sub Delete_Grid(ByVal sender As Object, ByVal e As DataGridCommandEventArgs)
        dgEmps.EditItemIndex = e.Item.ItemIndex
        Dim TheID As String
        TheID = e.Item.Cells(2).Text
        Dim DBConn As MySqlConnection
        Dim DBdelete As New MySqlCommand
        DBConn = New MySqlConnection(strConnection)
        DBdelete.CommandText = "delete from Employee " _
            & "Where ID = " & TheID
        DBdelete.Connection = DBConn
        DBdelete.Connection.Open()
        DBdelete.ExecuteNonQuery()
        DBConn.Close()
        dgEmps.EditItemIndex = -1
        BuildDataList()
    End Sub

    Sub CommandAdd_Click(ByVal Sender As Object, ByVal E As CommandEventArgs)
        Dim DBConn As MySqlConnection
        Dim DBAdd As New MySqlCommand
        DBConn = New MySqlConnection(strConnection)
        DBAdd.CommandText = "Insert Into Employee (LastName) " _
        & "values ('')"
        DBAdd.Connection = DBConn
        DBAdd.Connection.Open()
        DBAdd.ExecuteNonQuery()
        DBConn.Close()
        dgEmps.EditItemIndex = 0
        BuildDataList()
    End Sub
Sub BuildDataList ()
        Dim DBConn As MySqlConnection
        Dim DBCommand As MySqlDataAdapter
        Dim DSPageData as New DataSet
        DBConn = New MySqlConnection(strConnection)
        DBCommand = New MySqlDataAdapter _
            ("Select * From Employee " _
            & "Order By LastName, FirstName", DBConn)
        DBCommand.Fill(DSPageData, _
            "Employee")
        dgEmps.DataSource = _
            DSPageData.Tables("Employee").DefaultView
        dgEmps.DataBind()
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>Adding Rows to a DataGrid Control</TITLE>
</HEAD>
<Body LEFTMARGIN="40">
<form runat="server">
<BR><BR>
<asp:Label
    id="lblMessage"
    runat="server"
/>
<BR><BR>
<asp:datagrid
    id="dgEmps"
    runat="server"
    autogeneratecolumns="false"
    oneditcommand="Edit_Grid"
    oncancelcommand="Canceledit"
    onupdatecommand="Update_Grid"
    ondeletecommand="Delete_Grid"
    >
    <columns>
        <asp:boundcolumn
            HeaderText="Last Name"
            DataField="LastName"
        />
        <asp:boundcolumn
            HeaderText="First Name"
            DataField="FirstName"
        />
        <asp:boundcolumn
            datafield="ID"
            visible=False
            readonly=true
        />
        <asp:editcommandcolumn
             edittext="Edit"
             updatetext="Update"
             canceltext="Cancel"
             itemstyle-wrap="false"
             headertext="Edit"
             headerStyle-wrap="false"
        />
        <asp:ButtonColumn Text="Delete" CommandName="Delete"/>
    </columns>
</asp:datagrid>
<BR><BR>
  <asp:LinkButton
    id="butAdd"
    text="Add"
    commandname="Add"
    oncommand="CommandAdd_Click"
    runat="server"
  />
</form>
</BODY>
</HTML>


Bm Keshav

20120131-EE-VQP-002

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