C# How to place an arraylist inside a Session Variable and Iterate through it

Question:

Hi,

In my web form, I want to store multiple IDs inside an arraylist and then store the arraylist in a Session Variable (e.g. Session["InstallationID"]) to use it in a different web form where I want to use every ID inside the arraylist.

How do I place the arraylist inside the Session Variable and then take each ID off of it to be used in a SELECT statement?

Answer:

Something like this:

1    protected void Page_Load(object sender, EventArgs e)
2    {
3        if (!IsPostBack)
4        {
5            List<int> ids = new List<int> {1, 2, 3, 4, 5};
6            Session["myIds"] = ids;
7        }
8    }
9    
10   protected void buttonSubmit_Click(object sender, EventArgs e)
11   {
12       List<int> ids = Session["myIds"] != null ? (List<int>) Session["myIds"] : null;
13       if (ids != null)
14       {
15           foreach (int id in ids)
16           {
17               ListBox1.Items.Add(String.Format("select * from customer where id={0}", id));
18           }
19       }
20   }

OR


protected void Page_Load(object sender, EventArgs e)
  {
      //Save
      ArrayList idList = new ArrayList();
      idList.Add("1");
      idList.Add("2");
      idList.Add("3");
      Session["InstallationId"] = idList;
  }//Page2

protected void Page_Load(object sender, EventArgs e)

{

//Retreive

ArrayList idList = (ArrayList)Session["InstallationId"];

string id1 = idList[0].ToString() ;

string id2 = idList[1].ToString();

string id3 = idList[2].ToString();

}

Refer for references: http://forums.asp.net/t/1425975.aspx

Maintain Scroll Position after Asynchronous Postback

Maintain Scroll Position after Asynchronous Postback

Do you want to maintain the scroll position of a GridView, Div, Panel, or whatever that is inside of an UpdatePanel after an asynchronous postback? Normally, if the updatepanel posts back, the item will scroll back to the top because it has been reloaded. What you need to do is “remember” where the item was scrolled to and jump back to there after the postback. Place the following script after the ScriptManager on your page. And since the _endRequest event of the PageRequestManager happens before the page is rendered, you’ll never even see your item move!

<script type="text/javascript">
var xPos, yPos;
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_beginRequest(BeginRequestHandler);
prm.add_endRequest(EndRequestHandler);
function BeginRequestHandler(sender, args) {
xPos = $get('scrollDiv').scrollLeft;
yPos = $get('scrollDiv').scrollTop;
}
function EndRequestHandler(sender, args) {
$get('scrollDiv').scrollLeft = xPos;
$get('scrollDiv').scrollTop = yPos;
}
</script>

How to check the Status of the Internet connection from windows application in C#.net

How to check the Status of the Internet connection from windows application in C#.net


try this:
bool ConnectionExists()
{
try
{
System.Net.Sockets.TcpClient clnt=new System.Net.Sockets.TcpClient("www.google.com",80);
clnt.Close();
return true;
}
catch(System.Exception ex)
{
return false;
}
}



or this one

public static bool Test(string url)
{
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "HEAD";
try {
HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
resp.Close(); return true;
}
catch { return false; } }


or

In this tutorial, we'll create a class with a static function that returns true if connected and false if not, using our API function in private state.

Check this out :

using System ;
using System.Runtime ;
using System.Runtime.InteropServices ;

public class InternetCS
{

//Creating the extern function...
[DllImport("wininet.dll")]
private extern static bool InternetGetConnectedState( int out Description, int ReservedValue ) ;

//Creating a function that uses the API function...
public static bool IsConnectedToInternet( )
{

int Desc ;
return InternetGetConnectedState( out Desc, 0 ) ;

}

}

Get the Checkboxlist values using javascript:

Get the Checkboxlist values using javascript:

We cannot get the value of the checkbox in the checkboxlist because it is rendered in the form of table , td, input and the text of the check is like label.

So we need to bind the value of checkbox in the tilte attribute and then we can read the title values using javascript.

<script type="text/javascript">

function IsCheck()

{

var UserID="";

var UserCode=""

var cblist = "ChkBoxListUsers";

var chkList1= document.getElementById(cblist);

var arrayOfCheckBoxes= chkList1.getElementsByTagName("input");

var arrayOfCheckBoxspans= chkList1.getElementsByTagName("span");

var arrayOfCheckBoxLabels= chkList1.getElementsByTagName("label");

var listcount = arrayOfCheckBoxes.length;

for(var i=0;i<arrayOfCheckBoxes.length;i++)

{

if(arrayOfCheckBoxes[i].checked)

{

UserCode += arrayOfCheckBoxspans[i].title + ",";

UserID += arrayOfCheckBoxLabels[i].innerHTML+ ", ";

}

}

window.opener.document.forms[0].HdnSelectedUsers.value=UserCode;

window.opener.document.forms[0].txtSelectedUsers.value=UserID;

window.close();

return false;

}

</script>

Frontend:

<body>

<form id="form1" runat="server">

<div style="text-align: center">

<fieldset class="Fieldset" style="width: 95%" runat="server" id="fsToolDetails">

<legend class="Legend_Text"><strong>User Details</strong></legend>

<table border="0" cellpadding="0" cellspacing="0" style="width: 100%">

<tr>

<td align="center">

<asp:Label ID="Label1" runat="server" Text="SELECT USER" Width="240px" CssClass="Headlabel"></asp:Label></td>

</tr>

<tr>

<td align="left" style="height: 14px">

<asp:Label ID="lblError" runat="server" CssClass="Err_label"></asp:Label></td>

</tr>

<tr>

<td width="100%" align="left" height="150px">

<div align="left" style="width:300px; height: 159px; width: 100%; overflow: auto; padding-top: 1px;

padding-left: 1px">

<asp:CheckBoxList ID="ChkBoxListUsers" runat="server" CssClass="selectBox" Width="500px" RepeatColumns="2" RepeatDirection="Horizontal" OnDataBound="ChkBoxListUsers_DataBound">

</asp:CheckBoxList>

</div>

</td>

</tr>

<tr>

<td align="center">

<asp:Button ID="btnSubmit" Text="Order" runat="server" CssClass="buttons"

Width="57px" />

<asp:Button ID="btnClose" Text="Close" runat="server" CssClass="buttons" Width="54px"

OnClientClick="window.close();" />

</td>

</tr>

<tr>

<td align="center">

</td>

</tr>

</table>

</fieldset>

</div>

<script type="text/javascript">

function IsCheck()

{

var UserID="";

var UserCode=""

var cblist = "ChkBoxListUsers";

var chkList1= document.getElementById(cblist);

var arrayOfCheckBoxes= chkList1.getElementsByTagName("input");

var arrayOfCheckBoxspans= chkList1.getElementsByTagName("span");

var arrayOfCheckBoxLabels= chkList1.getElementsByTagName("label");

var listcount = arrayOfCheckBoxes.length;

for(var i=0;i<arrayOfCheckBoxes.length;i++)

{

if(arrayOfCheckBoxes[i].checked)

{

UserCode += arrayOfCheckBoxspans[i].title + ",";

UserID += arrayOfCheckBoxLabels[i].innerHTML+ ", ";

}

}

window.opener.document.forms[0].HdnSelectedUsers.value=UserCode;

window.opener.document.forms[0].txtSelectedUsers.value=UserID;

window.close();

return false;

}

</script>

</form>

</body>

Codebehind:

protected void Page_Load(object sender, EventArgs e)

{

if(!IsPostBack)

{

btnSubmit.Attributes.Add("onclick", "return IsCheck();");

if( Request.QueryString["CompanyId"] != null && Request.QueryString["CompanyId"] != "")

{

FillUsers(Request.QueryString["CompanyId"]);

}

}

}

private void FillUsers(string CompanyID)

{

BLLPopUpUser ObjPopUpUser = new BLLPopUpUser();

DataSet ds = new DataSet();

ds = ObjPopUpUser.GetUserListfromCompany(CompanyID);

ChkBoxListUsers.DataSource = ds;

ChkBoxListUsers.DataTextField = "CU_UserID";

ChkBoxListUsers.DataValueField = "CU_UserCode";

ChkBoxListUsers.DataBind();

}

protected void ChkBoxListUsers_DataBound(object sender, EventArgs e)

{

CheckBoxList chkList = (CheckBoxList)(sender);

if (Request.QueryString["Users"] != null && Request.QueryString["Users"].ToString() != "")

{

string[] users = Request.QueryString["Users"].ToString().Split(',');

for (int i = 0; i < users.Length; i++)

{

if (chkList.Items.FindByText(users[i]) != null)

{

chkList.Items.FindByText(users[i]).Selected = true;

}

}

}

foreach (ListItem item in chkList.Items)

{

item.Attributes.Add("title", item.Value);

}

}