ASP.NET

27-Jan-09 19:01

In my form, I have two dropdownists called Countries and States which are dynamically generating. These controls are generating only at the run time and the Country dropdown gets loaded for the first time.

I have written code for the SelectedIndexchanged of the Country dropdown so that the corresponding States also will get updated in the States dropdownlists. These are all working fine.

My issue is these are working in a Postback condition. Can I use an UpdatePanel dynamically so that the User doesn't get an impression that the page is actually posting back. Any idea how to create the Update panels dynamically so as to include both the dropdownlists and populate without a postback? Thanks for any help.

Success is the good fortune that comes from aspiration, desperation, perspiration and inspiration.

N a v a n e e t h27-Jan-09 19:10

27-Jan-09 19:10

meeram395 wrote:
My issue is these are working in a Postback condition. Can I use an UpdatePanel dynamically so that the User doesn't get an impression that the page is actually posting back

How user is getting that page is posting back? A post-back and page refresh is not same. Are you saying your page is refreshing?

Not sure I got you correctly.

Smile | :)

Navaneeth

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meeram39527-Jan-09 19:58

27-Jan-09 19:58

Thank you for the immediate response. Sorry that I didn't mention clearly the issue.

Page is not refreshing. It is posting back, means when the User Selects a country from the CountryDropdownlist, the corresponding States are populated from sql database by passing the CountryId.

I made the AutoPostBack property of Country to True so that it posts back to the server when the index changed. Hope this is clear now.

Success is the good fortune that comes from aspiration, desperation, perspiration and inspiration.

N a v a n e e t h27-Jan-09 20:38

27-Jan-09 20:38

Well, how can the second dropdown be filled without a post-back? AFAIK, you can't avoid page posting back. BTW, what is wrong by doing so and why are you trying to prevent it?

Navaneeth

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meeram39528-Jan-09 4:47

28-Jan-09 4:47

You are right. The second dropdown is filled with a post-back only. But while using the UpdatePanel, the user will not get the feeling that the page is actually posting back. This will help him to enter the data in other controls and need not wait for the page to be reloaded.

Success is the good fortune that comes from aspiration, desperation, perspiration and inspiration.

N a v a n e e t h27-Jan-09 20:47

27-Jan-09 20:47

If updatepanel is used only for filling the dropdowns without page refresh, why don't you try Cascading Dropdown[^]?

Navaneeth

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Rajdev Ramasamy27-Jan-09 20:11

Rajdev Ramasamy

27-Jan-09 20:11

We can add update panels dynamically. Please refer the following code sample(working):

Note: This is a Sample code

Aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="DynamicUpdatePanel.aspx.cs" Inherits="DynamicUpdatePanel" %>

<!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 runat="server">
    <title>Dynamic Update Panel</title>
</head>
<body>
    <form id="frmDynamicUpdatePanel" runat="server">    
    <asp:ScriptManager ID="pageScriptManager" runat="server"></asp:ScriptManager>
  <asp:Panel ID="panelControls" runat="server">
  </asp:Panel>
    </form>
</body>
</html>

.CS

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class DynamicUpdatePanel : System.Web.UI.Page
{
    DataTable dtCountry;
    DataTable dtState;

    protected void Page_Load(object sender, EventArgs e)
    {
        PopulateData();
        CreateControls();
    }

    protected void CreateControls()
    {
        UpdatePanel updatePanel = new UpdatePanel();
                
        DropDownList ddlCountry = new DropDownList();
        ddlCountry.ID = "ddlCountry";
        ddlCountry.Items.Add(new ListItem("-Select-", "-1"));
        ddlCountry.DataSource = dtCountry;
        ddlCountry.DataValueField = "CountryID";
        ddlCountry.DataTextField = "CountryName";
        ddlCountry.DataBind();
        ddlCountry.SelectedIndexChanged += ddlCountry_SelectedIndexChanged;
        ddlCountry.Items.Insert(0, new ListItem("-Select-", "-1"));
        ddlCountry.AutoPostBack = true;

        DropDownList ddlState = new DropDownList();
        ddlState.ID = "ddlState";
        ddlState.Items.Insert(0, new ListItem("-Select-", "-1"));
        
        updatePanel.ContentTemplateContainer.Controls.AddAt(0, ddlCountry);
        updatePanel.ContentTemplateContainer.Controls.AddAt(1, ddlState);

        panelControls.Controls.Add(updatePanel);

    }

    protected void PopulateData()
    {
        dtCountry = new DataTable();
        DataColumn dc;

        dc = new DataColumn("CountryID");
        dtCountry.Columns.Add(dc);

        dc = new DataColumn("CountryName");
        dtCountry.Columns.Add(dc);

        dtState = new DataTable();

        dc = new DataColumn("CountryID");
        dtState.Columns.Add(dc);

        dc = new DataColumn("StateID");
        dtState.Columns.Add(dc);

        dc = new DataColumn("StateName");
        dtState.Columns.Add(dc);

        DataRow dr;

        dr = dtCountry.NewRow();
        dr["CountryID"] = "1";
        dr["CountryName"] = "India";
        dtCountry.Rows.Add(dr);

        dr = dtCountry.NewRow();
        dr["CountryID"] = "2";
        dr["CountryName"] = "USA";
        dtCountry.Rows.Add(dr);

        dr = dtState.NewRow();
        dr["CountryID"] = "1";
        dr["StateID"] = "1";
        dr["StateName"] = "Delhi";
        dtState.Rows.Add(dr);

        dr = dtState.NewRow();
        dr["CountryID"] = "1";
        dr["StateID"] = "2";
        dr["StateName"] = "UP";
        dtState.Rows.Add(dr);

        dr = dtState.NewRow();
        dr["CountryID"] = "1";
        dr["StateID"] = "3";
        dr["StateName"] = "AP";
        dtState.Rows.Add(dr);

        dr = dtState.NewRow();
        dr["CountryID"] = "1";
        dr["StateID"] = "4";
        dr["StateName"] = "MP";
        dtState.Rows.Add(dr);

        dr = dtState.NewRow();
        dr["CountryID"] = "1";
        dr["StateID"] = "5";
        dr["StateName"] = "Orissa";
        dtState.Rows.Add(dr);

        dr = dtState.NewRow();
        dr["CountryID"] = "2";
        dr["StateID"] = "6";
        dr["StateName"] = "Alabama";
        dtState.Rows.Add(dr);

        dr = dtState.NewRow();
        dr["CountryID"] = "2";
        dr["StateID"] = "7";
        dr["StateName"] = "Alaska";
        dtState.Rows.Add(dr);

        dr = dtState.NewRow();
        dr["CountryID"] = "2";
        dr["StateID"] = "8";
        dr["StateName"] = "Arizona";
        dtState.Rows.Add(dr);
        
    }

    protected void ddlCountry_SelectedIndexChanged(object sender, EventArgs e)
    {
        DropDownList ddlCountry = (DropDownList)sender;
        DropDownList ddlState = (DropDownList)panelControls.FindControl("ddlState");
        ddlState.Items.Clear();
        ddlState.Items.Add(new ListItem("-Select-", "-1"));
        
        if(ddlCountry.SelectedValue != "-1")
        {
            DataRow[] drCollection;
            drCollection = dtState.Select("CountryID = " + ddlCountry.SelectedValue);            
            foreach (DataRow dr in drCollection)
            {
                ddlState.Items.Add(new ListItem(dr["StateName"].ToString(), dr["StateID"].ToString()));
            }         
        }
    }
}

Please revert back on any doubts.

Thanks,
Rajdev KR

meeram39528-Jan-09 21:35

Sending Same Message to Multiple Users

28-Jan-09 21:35

Sorry for the late reply.

Thank you Rajdev. Code Works perfectly fine. Thanks a lot!!!

Success is the good fortune that comes from aspiration, desperation, perspiration and inspiration.

sjs4u27-Jan-09 19:00

sjs4u

27-Jan-09 19:00

Hi,

I am sending message to multiple user. I am using forloop and using this for loop it takes the numbers one by one from the textfile and send the sms.

but it takes to much time for 10 numbers at a time.

Is it possible with Multithread or Webservices ? Or any other solution.

Thanks

sjs

Aman Bhullar27-Jan-09 19:03

Aman Bhullar

27-Jan-09 19:03

How you are sending SMS

Are you using a SMS Gateway
OR
Sending SMS from mobile using symbian API's

sjs4u27-Jan-09 19:12

sjs4u

27-Jan-09 19:12

I am using SMS Gateway

Aman Bhullar27-Jan-09 19:22

Aman Bhullar

27-Jan-09 19:22

Then you need to check out with Gateway Documentation, whether they allow comma separated list in to field

sjs4u27-Jan-09 19:28

sjs4u

27-Jan-09 19:28

Yes. Gateway supports comma Separate list

J4amieC27-Jan-09 23:29

J4amieC

27-Jan-09 23:29

So then send it comma separated list Confused | :confused:

JavaScript function for custom server control

Aman Bhullar28-Jan-09 1:33

Aman Bhullar

28-Jan-09 1:33

then, where is the problem, send the comma separated list Roll eyes | :rolleyes:

AnuMaria27-Jan-09 18:47

AnuMaria

27-Jan-09 18:47

Hi All,
I am creating a custom server control for multiselection drop down list. This control contains AspxEditButton, check box list and panel. AspxEditButton and check box list are placed in that panel. I have to display selected items from check box list to AspxEditButton at the time of MouseOut from panel. Can I use code as follows at WebControl1.cs,

_panel.Attributes.Add("onmouseout", "Javascript:CtrlLeave(); ");

And can I write CtrlLeave() javascript function at WebControl1.cs How can I write a javascript function at WebControl1.cs?

Regards,

Anu

Re: JavaScript function for custom server control

N a v a n e e t h27-Jan-09 18:52