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Enable Calendar only when user inputs link button RSS

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Last post May 21, 2012 06:55 PM by niksv

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Karthick_pal...

Member

1 Points

15 Posts

Enable Calendar only when user inputs link button

May 21, 2012 02:56 PM|LINK

Hi,

I have tried to write a sample program to display the calendar only when the user selects the particular row in a data grid and also retrieve the value in the text box.I have tried possible ways but so far have not been able to get the correct way to have it worked.Please help

I am aware that the text box vaue can be retrieved by using findcontrol in the row data bound but not able to acheive enabling the calendar only when the user opts for the linkbutton.Thanks

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Cal_Run.aspx.vb" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
     <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
            <Columns>
                <asp:BoundField HeaderText="Title" />
                <asp:TemplateField HeaderText="Year">
                    <ItemTemplate>
                        <asp:TextBox ID="Text1" runat="server" AutoPostBack="True"
                            ></asp:TextBox>
                            <asp:LinkButton ID="LinkButton1" runat="server" onclick="LinkButton1_Click"
                            CommandName="Pick">PickDate...</asp:LinkButton>
                        <asp:Calendar ID="Cal1" runat="server"
                            onselectionchanged="Cal1_SelectionChanged" Visible="False"></asp:Calendar>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
    </div>
    </form>
</body>
</html>

Source Code

Imports System.Data
Imports System.Configuration
Imports System.Collections
Imports System.Web
Imports System.Web.Security
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts
Imports System.Web.UI.HtmlControls
Partial Class _Default
    Inherits System.Web.UI.Page
    Public Function GetCustomMadeDataTable() As DataTable
        'Create a new DataTable object
        Dim objDataTable As New System.Data.DataTable()
        'Create three columns with string as their type
        objDataTable.Columns.Add("ISBN", GetType(String))
        objDataTable.Columns.Add("Title", GetType(String))
        objDataTable.Columns.Add("Publisher", GetType(String))
        objDataTable.Columns.Add("Year", GetType(String))
        Dim dcPk As DataColumn() = New DataColumn(0) {}
        dcPk(0) = objDataTable.Columns("ISBN")
        objDataTable.PrimaryKey = dcPk
        objDataTable.Columns("ISBN").AutoIncrement = True
        objDataTable.Columns("ISBN").AutoIncrementSeed = 1
        'Adding some data in the rows of this DataTable
        Dim dr As DataRow
        For i As Integer = 1 To 10
            dr = objDataTable.NewRow()
            dr(1) = "Title" & i.ToString()
            dr(2) = "Publisher" & i.ToString()
            dr(3) = "12/12/200" & i.ToString()
            objDataTable.Rows.Add(dr)
        Next
        Session("strTemp") = objDataTable
        Return objDataTable
    End Function
    Protected Sub Cal1_SelectionChanged(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim cal As Calendar = DirectCast(sender, Calendar)
        Dim text1 As TextBox = DirectCast(DirectCast(cal.Parent.Parent, GridViewRow).FindControl("text1"), TextBox)

        'text1.Text = cal1.value.ToShortDateString()
        text1.Text = cal.SelectedDate.ToShortDateString()
        cal.Visible = False

    End Sub

    Protected Sub Page_PreLoad(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreLoad
        Dim dt As DataTable
        dt = GetCustomMadeDataTable()
        GridView1.DataSource = dt
        GridView1.DataBind()
    End Sub

    Protected Sub LinkButton1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
        
    End Sub

    Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
        If e.Row.RowType = DataControlRowType.DataRow Then
            Dim LinkBut As LinkButton = DirectCast(e.Row.FindControl("LinkButton1"), LinkButton)
            Dim cal As Calendar = DirectCast(e.Row.FindControl("Cal1"), Calendar)

            'If user has selected the particular record enable the calendar for that row alone
        End If

    End Sub
End Class

Marked as answer by Karthick_pals on Jun 03, 2012 02:36 AM

niksv

Contributor

5925 Points

1115 Posts

Re: Enable Calendar only when user inputs link button

May 21, 2012 06:55 PM|LINK

/*** ASPX ***/
<asp:GridView ID="GridView1" runat="server" onrowcommand="GridView1_RowCommand" AutoGenerateColumns="false">
            <Columns>
                <asp:TemplateField>
                    <ItemTemplate>
                        <asp:Button runat="server" CommandName="EnableLink" Text="Button" />
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField>
                    <ItemTemplate>
                        <asp:LinkButton ID="LinkButton" runat="server" Enabled="false" Text="LinkButton" />
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
</asp:GridView>

/*** CS ***/
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
        Control source = e.CommandSource as Control;

        if(source != null)
        {
            if (source is Button && e.CommandName.Equals("EnableLink"))
            {
                var row = source.Parent.NamingContainer as GridViewRow;
                var link = row.FindControl("LinkButton") as LinkButton;
                link.Enabled = true;
            }
        }
}

NOTE: You can do the same thing with Calendar. Above is just a sample code.

dotnetprof.blogspot.com

Marked as answer by Qin Dian Tang - MSFT on May 28, 2012 01:50 AM