ASP.NET(vb.net) & DataGrid - FindControl

Author: admin | Posted: 06-06-2010 | Category: ASP.NET(vb.net) & DataGrid Control

ASP.NET(vb.net) & DataGrid - FindControl Example scripts how to Explains DataGrid control in asp.net , The FindControl is searches the current naming container for a server control with the specified id parameter.

ShotDev Focus:
- ASP.NET(vb.net) & DataGrid - FindControl

Example

DataGridFindControl.aspx


<%@ import Namespace="System.Data" %>
<%@ import Namespace="System.Data.OleDb" %>
<%@ Page Language="VB" %>
<script runat="server">

Dim objConn As OleDbConnection
Dim objCmd As OleDbCommand

Sub Page_Load(sender As Object, e As EventArgs)
Dim strConnString As String
strConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="&Server.MapPath("database/mydatabase.mdb")&";"
objConn = New OleDbConnection(strConnString)
objConn.Open()

IF Not Page.IsPostBack() Then
BindData()
End IF
End Sub

Sub BindData()
Dim strSQL As String
strSQL = "SELECT * FROM customer"

Dim dtReader As OleDbDataReader
objCmd = New OleDbCommand(strSQL, objConn)
dtReader = objCmd.ExecuteReader()

'*** BindData to DataGrid ***'
myDataGrid.DataSource = dtReader
myDataGrid.DataBind()

dtReader.Close()
dtReader = Nothing

End Sub

Sub Page_UnLoad()
objConn.Close()
objConn = Nothing
End Sub

Private Sub myDataGrid_ItemDataBound(sender As Object, e As DataGridItemEventArgs)
'*** CustomerID ***'
Dim lblCustomerID As Label = CType(e.Item.FindControl("lblCustomerID"),Label)
IF Not IsNothing(lblCustomerID) Then
lblCustomerID.Text = e.Item.DataItem("CustomerID")
End IF

'*** Name ***'
Dim lblName As Label = CType(e.Item.FindControl("lblName"),Label)
IF Not IsNothing(lblName) Then
lblName.Text = e.Item.DataItem("Name")
End IF

'*** Email ***'
Dim lblEmail As Label = CType(e.Item.FindControl("lblEmail"),Label)
IF Not IsNothing(lblEmail) Then
lblEmail.Text = e.Item.DataItem("Email")
End IF

'*** CountryCode ***'
Dim lblCountryCode As Label = CType(e.Item.FindControl("lblCountryCode"),Label)
IF Not IsNothing(lblCountryCode) Then
lblCountryCode.Text = e.Item.DataItem("CountryCode")
End IF

'*** Budget ***'
Dim lblBudget As Label = CType(e.Item.FindControl("lblBudget"),Label)
IF Not IsNothing(lblBudget) Then
lblBudget.Text = FormatNumber(e.Item.DataItem("Budget"),2)
End IF

'*** Used ***'
Dim lblUsed As Label = CType(e.Item.FindControl("lblUsed"),Label)
IF Not IsNothing(lblUsed) Then
lblUsed.Text = FormatNumber(e.Item.DataItem("Used"),2)
End IF
End Sub

Sub Button1_Click(sender As Object, e As EventArgs)
Dim chkCusID As CheckBox
Dim lblID As Label
Dim i As Integer
lblText.Text = ""
For i = 0 To myDataGrid.Items.Count - 1
chkCusID = myDataGrid.Items(i).FindControl("chkCustomerID")
lblID = myDataGrid.Items(i).FindControl("lblCustomerID")
IF chkCusID.Checked = True Then
'*** Have lblID.Text ***'
Me.lblText.Text = Me.lblText.Text & "<br>" & lblID.Text
End IF
Next
End Sub

</script>
<html>
<head>
<title>ShotDev.Com Tutorial</title>
</head>
<body>
<form id="form1" runat="server">
<asp:DataGrid id="myDataGrid" runat="server" AutoGenerateColumns="False" onItemDataBound="myDataGrid_ItemDataBound">

<Columns>

<asp:TemplateColumn HeaderText="Select">
<ItemTemplate>
<asp:CheckBox id="chkCustomerID" runat="server"></asp:CheckBox>
</ItemTemplate>
</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="CustomerID">
<ItemTemplate>
<asp:Label id="lblCustomerID" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="Name">
<ItemTemplate>
<asp:Label id="lblName" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="Email">
<ItemTemplate>
<asp:Label id="lblEmail" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="CountryCode">
<ItemTemplate>
<asp:Label id="lblCountryCode" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="Budget">
<ItemTemplate>
<asp:Label id="lblBudget" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="Used">
<ItemTemplate>
<asp:Label id="lblUsed" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateColumn>

</Columns>
</asp:DataGrid>
<br />
<asp:Button id="Button1" onclick="Button1_Click" runat="server" Text="Submit"></asp:Button>
<hr />
<asp:Label id="lblText" runat="server"></asp:Label>
</form>
</body>
</html>

Create a asp.net file and save to path root-path/dotnet/

Run
http://localhost/dotnet/DataGridFindControl.aspx

Screenshot

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