ASP.NET

29-Jul-07 20:00

When I click once on button the event is not fired..when I click twice then only the event is fired...what culd the proble b?

thanx

Christian Graus29-Jul-07 20:03

Christian Graus

29-Jul-07 20:03

Hard to say, without seeing any code. No way does a button not fire until you click it twice.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

miniThomas29-Jul-07 20:09

29-Jul-07 20:09

The code is in C#

I have written a javascript code on click event of button following is the code:
Also once condition is true i hv displayed a grid view getting data from db

function checkDotOnly()
{
if (document.form1.txtcustomerName.length!=0)
{
if((document.form1.txtcustomerName.value==".")||(document.form1.txtcustomerName.value==". ")||(document.form1.txtcustomerName.value==" "))
{
alert("Please Enter Valid Customer Name.");
/*document.form1.lblErrMsg.value="Please Enter Valid Customer Name.";
document.form1.lblErrMsg.disabled=false;*/
return false;
}
return true;
}
return true;
}

thanx

N a v a n e e t h29-Jul-07 20:30

N a v a n e e t h

29-Jul-07 20:30

ouch.. Very tough to read that script. Let me make it more clear

<script language="javascript" type="text/javascript">
function checkDotOnly()
{
   if (document.form1.txtcustomerName.length!=0)
   {
        if((document.form1.txtcustomerName.value==".")  ||(document.form1.txtcustomerName.value==". ") ||(document.form1.txtcustomerName.value==" "))
         {
              alert("Please Enter Valid Customer Name.");
              return false;
         }
         return true;
    }
    return true;
}
</script>

I think last two true you are returning. That is making problem. Try writting this like

<script language="javascript" type="text/javascript">
function checkDotOnly()
{
   if (document.form1.txtcustomerName.length!=0)
   {
        if((document.form1.txtcustomerName.value==".")  ||(document.form1.txtcustomerName.value==". ") ||(document.form1.txtcustomerName.value==" "))
         {
              alert("Please Enter Valid Customer Name.");
              return false;
         }
         else
              return true;
    }
    else
         return true;
}
</script>

My Website | Ask smart questions

ballameharmurali29-Jul-07 20:31

ballameharmurali

29-Jul-07 20:31

hello miniThomas,
Call that javascript in the Buton in onclientclick....It will work it is client side event.....

ok byeee

vidya.p.nair29-Jul-07 20:11

vidya.p.nair

29-Jul-07 20:11

You might have coded under button_doubleClick

You right the code under button_Click
Try it out Smile | :)

Vidya

miniThomas29-Jul-07 20:18

29-Jul-07 20:18

Hi Vidya,

The code is written On Click event

<asp:imagebutton id="imgbtnSearch" runat="server" imageurl="~/images/search.gif" alternatetext="Search" height="35" width="30" onclick="imgbtnSearch_Click">

thanx

manowj29-Jul-07 21:50

manowj

29-Jul-07 21:50

Hi,

Have you added this javascript function as the attributes of the button.

EX: Button1.attributes.add("OnClick","<Javascript function>")

Try this out.

Regards,
Manowj

N a v a n e e t h29-Jul-07 20:25

N a v a n e e t h

29-Jul-07 20:25

vidya.p.nair wrote:
You might have coded under button_doubleClick

It's ASP.NET. Not windows app. In this you won't get double click event. Confused | :confused:

My Website | Ask smart questions

miniThomas29-Jul-07 20:40

29-Jul-07 20:40

Hi Guys,

here is code:

<asp:imagebutton id="imgbtnSearch" runat="server" imageurl="~/images/search.gif" alternatetext="Search" height="35" width="30" onclick="imgbtnSearch_Click">

function checkDotOnly()
{
if (document.form1.txtcustomerName.length!=0)
{
if((document.form1.txtcustomerName.value==".")||(document.form1.txtcustomerName.value==". ")||(document.form1.txtcustomerName.value==" "))
{
alert("Please Enter Valid Customer Name.");
/*document.form1.lblErrMsg.value="Please Enter Valid Customer Name.";
document.form1.lblErrMsg.disabled=false;*/
return false;
}
return true;
}
return true;
}

protected void imgbtnSearch_Click(object sender, ImageClickEventArgs e)
{
if (RadioButtonList1.SelectedValue.ToString() == "")
{
lblMsg.Text = "";
lblErrMsg.Visible = true;
lblErrMsg.Text = "Please Select One Option.";
PnlSearchResults.Visible = false;
}
else
{

if (RadioButtonList1.SelectedIndex.ToString() == "0" && ddlOrderNo.SelectedItem.Value == "-1")
{
lblMsg.Text = "";
lblErrMsg.Visible = true;
lblErrMsg.Text = "Please Select Order Number.";
PnlSearchResults.Visible = false;
}
else
{
lblErrMsg.Visible = false;
fillSearchResults();

}
if (RadioButtonList1.SelectedIndex.ToString() == "1")
{

if (txtcustomerName.Text == "")
{
lblMsg.Text = "";
lblErrMsg.Visible = true;
lblErrMsg.Text = "Please Enter Customer Name.";
PnlSearchResults.Visible = false;
}
else
{
lblMsg.Text = "";
lblErrMsg.Visible = false;
fillSearchResults();
//Response.Write("domain=" + txtDomainName.Text + "cust=" + txtcustomerName.Text);
}
}
}
}//imgbtnSearch_Click

thanx

How can eliminate constant polling?

N a v a n e e t h29-Jul-07 21:21

N a v a n e e t h

29-Jul-07 21:21

Have you tried suggestion in my previous posting ?

My Website | Ask smart questions

Mikeyyy29-Jul-07 19:37

Mikeyyy

29-Jul-07 19:37

Scenario:

I have two web users. If user 1 makes a change to an Application server state variable, how do I notify user 2 about the new info without doing constant javascript polling in a timer using Ajax, which is what I am doing right now?

I would like to make this more efficient because the contant polling seems expensive to me. Any ideas?

Thanks!

Re: How can eliminate constant polling?

Christian Graus29-Jul-07 20:02

Christian Graus

29-Jul-07 20:02

AJAX is the only way you can send info to a user who does not themselves click on a link, or go to a new page.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Problem with postback

dharanighanta29-Jul-07 19:31

29-Jul-07 19:31

Hi All,
We have two dropdownlists in my web page.In second dropdownlist items will be appear based upon first dropdownlist selection item with out page postback.I have implemented using System.Web.UI.ICallbackEventHandler interface with asp.net2.0. But i structed with button click event.If i click button for save the info into database the second dropdownlist items cleared.I am sending my code here.Pls go throught it tell me solution.....

CODEBEHIEND CODE:

Using System;

Using System.Data;

Using System.Data. SqlClient;

Using System.Configuratio n;

Using System.Web.Configur ation;

Using System.Collections;

Using System.Web;

Using System.Web.Security ;

Using System.Web.UI;

Using System.Web.UI. WebControls;

Using System.Web.UI. WebControls. WebParts;

Using System.Web.UI. HtmlControls;

Using System.Text;

Public partial class ClientCallBack : System.Web.UI.Page, System.Web.UI.ICallbackEventHandler

{

private string raiseCallArgument, stateId;

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

string strConnection = WebConfigurationMan ager.ConnectionStrings["DemoConn"].ConnectionString;

SqlConnection con = new SqlConnection(strConnection) ;

string strSQL = "SELECT DISTINCT * FROM tblRmStateMaster";

using (con)

{

con.Open();

SqlCommand objCmd = new SqlCommand(strSQL, con);

SqlDataReader dtReader = objCmd.ExecuteReade r();

using (dtReader)

{

if (dtReader.HasRows)

{

ddl.DataSource = dtReader;

ddl.DataTextField = "Statename";

ddl.DataValueField = "Statename";

ddl.DataBind( );

}

}

}

}

if (Request.Browser. SupportsCallback )

{

string callbackRef = Page.ClientScript. GetCallbackEvent Reference(this, "document.forms[ 0].elements[ 'ddl'].value", "CallbackonClientsi de", "null");

ddl.Attributes["onChange"] = callbackRef;

}

}

public void RaiseCallbackEvent(string raiseCallArgument)

{

this.raiseCallArgument = raiseCallArgument;

stateId = this.raiseCallArgument;

}

//This method should return a string value for the Javascript method to handle

public string GetCallbackResult( )

{

StringBuilder returnString = new StringBuilder();

using (SqlConnection cn = new SqlConnection(ConfigurationManage r.ConnectionStrings["DemoConn"].ToString() ))

{

cn.Close();

cn.Open();

SqlCommand cmd1 = new SqlCommand("select * from tblRmStateMaster where Statename='" + stateId + "' ", cn);

SqlDataReader dr;

dr = cmd1.ExecuteReader( );

string str = "";

while (dr.Read())

{

str = dr[

"Stateid"].ToString() ;

}

dr.Close();

cn.Close();

int a = ddl.SelectedIndex + 1;

string exp = raiseCallArgument;

try

{

cn.Open();

SqlCommand cmd = new SqlCommand("select DISTINCT * from tblRmCountyMaster where Stateid=" + str, cn);

SqlDataReader rdr1 = cmd.ExecuteReader( );

using (rdr1)

{

while (rdr1.Read() )

{

returnString. Append(rdr1[ 2]);

returnString. Append(",");

}

}

rdr1.Close() ;

cn.Close();

}

catch (Exception ex)

{

Response.Write( ex.Message) ;

}

}

return returnString. ToString( );

}

protected void Button1_Click(object sender, EventArgs e)

{

Response.Write( ddl.SelectedItem .Text);

Response.Write( DropDownList1. SelectedItem. Text);

}

}

ASPX CODE:

<%

@ Page Language="C#" AutoEventWireup="true" CodeFile="ClientCallBack. aspx.cs" Inherits="ClientCallBack" EnableEventValidati on="false" %>

<

html xmlns="http://www. w3.org/1999/ xhtml">

<

head id="Head1" runat="server">

<title>Client Callback on ChillapzLocal

//Function to handle and process the server-side result

//The result comes as string and the method takes two arguments, here.

function CallbackonClientsid e(stringResult, context)

{

var listCompany = document.forms[ 0].elements['DropDownList1'];

listCompany. innerHTML =

"";

var entries = stringResult. split(',');

var str = "";

for(var i=0;i<entries.length- 1;i++)

{

var company = entries[i];

//Create the list item

var item = document.createElem ent('option');

item.value = company;

item.innerHTML = company;

listCompany. appendChild( item);

}

//alert("end" );

}

<

body>

State:

<asp:dropdownlist id="ddl" runat="server">

County:

<asp:dropdownlist id="DropDownList1" runat="server">

<asp:button id="Button1" runat="server" onclick="Button1_Click" text="Button">

Paul Conrad29-Jul-07 19:45

Paul Conrad

29-Jul-07 19:45

Can you narrow down where the problem is occurring? It is rather difficult with the way the code is formatted in your post. Try to have it inside < pre > / < /pre >tags to preserve the indentation for the most part Smile | :)

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

dharanighanta29-Jul-07 19:58

29-Jul-07 19:58

Hi Paul,

Thank you for the immediate reply.I am sending code put it in pre tags...

CODEBEHIEND CODE:

Using System;

Using System.Data;

Using System.Data. SqlClient; 

Using System.Configuratio n; 

Using System.Web.Configur ation; 

Using System.Collections; 

Using System.Web; 

Using System.Web.Security ; 

Using System.Web.UI; 

Using System.Web.UI. WebControls; 

Using System.Web.UI. WebControls. WebParts; 

Using System.Web.UI. HtmlControls; 

Using System.Text; 

Public partial class ClientCallBack : System.Web.UI.Page, System.Web.UI.ICallbackEventHandler 

{

private string raiseCallArgument, stateId; 

protected void Page_Load(object sender, EventArgs e) 

{

if (!IsPostBack) 

{

string strConnection = WebConfigurationMan ager.ConnectionStrings["DemoConn"].ConnectionString; 

SqlConnection con = new SqlConnection(strConnection) ; 

string strSQL = "SELECT DISTINCT * FROM tblRmStateMaster"; 

using (con) 

{

con.Open();

SqlCommand objCmd = new SqlCommand(strSQL, con); 

SqlDataReader dtReader = objCmd.ExecuteReade r(); 

using (dtReader) 

{

if (dtReader.HasRows) 

{

ddl.DataSource = dtReader;

ddl.DataTextField = "Statename"; 

ddl.DataValueField = "Statename"; 

ddl.DataBind( );

}

}

}

}

if (Request.Browser. SupportsCallback ) 

{

string callbackRef = Page.ClientScript. GetCallbackEvent Reference(this, "document.forms[ 0].elements[ 'ddl'].value", "CallbackonClientsi de", "null"); 

ddl.Attributes["onChange"] = callbackRef; 

}

}

public void RaiseCallbackEvent(string raiseCallArgument) 

{

this.raiseCallArgument = raiseCallArgument; 

stateId = this.raiseCallArgument; 

}

//This method should return a string value for the Javascript method to handle 

public string GetCallbackResult( ) 

{

StringBuilder returnString = new StringBuilder(); 

using (SqlConnection cn = new SqlConnection(ConfigurationManage r.ConnectionStrings["DemoConn"].ToString() )) 

{

cn.Close();

cn.Open();

SqlCommand cmd1 = new SqlCommand("select * from tblRmStateMaster where Statename='" + stateId + "' ", cn); 

SqlDataReader dr; 

dr = cmd1.ExecuteReader( );

string str = ""; 

while (dr.Read()) 

{

str = dr[

"Stateid"].ToString() ; 

}

dr.Close();

cn.Close();

int a = ddl.SelectedIndex + 1; 

string exp = raiseCallArgument; 

try 

{

cn.Open();

SqlCommand cmd = new SqlCommand("select DISTINCT * from tblRmCountyMaster where Stateid=" + str, cn); 

SqlDataReader rdr1 = cmd.ExecuteReader( ); 

using (rdr1) 

{

while (rdr1.Read() ) 

{

returnString. Append(rdr1[ 2]);

returnString. Append(","); 

}

}

rdr1.Close() ;

cn.Close();

}

catch (Exception ex) 

{

Response.Write( ex.Message) ;

}

}

return returnString. ToString( ); 

}

protected void Button1_Click(object sender, EventArgs e) 

{

Response.Write( ddl.SelectedItem .Text);

Response.Write( DropDownList1. SelectedItem. Text);

}

}

ASPX CODE:

<%

@ Page Language="C#" AutoEventWireup="true" CodeFile="ClientCallBack. aspx.cs" Inherits="ClientCallBack" EnableEventValidati on="false" %> 

<!

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

< 

html xmlns="http://www. w3.org/1999/ xhtml"> 

< 

head id="Head1" runat="server"> 

<title>Client Callback on ChillapzLocal</title> 

<script type="text/javascript" language="javascript"> 

//Function to handle and process the server-side result 

//The result comes as string and the method takes two arguments, here. 

function CallbackonClientsid e(stringResult, context) 

{

var listCompany = document.forms[ 0].elements['DropDownList1']; 

listCompany. innerHTML = 

""; 

var entries = stringResult. split(','); 

var str = ""; 

for(var i=0;i<entries.length- 1;i++) 

{

var company = entries[i]; 

//Create the list item 

var item = document.createElem ent('option'); 

item.value = company;

item.innerHTML = company;

listCompany. appendChild( item);

}

//alert("end" ); 

}

</script> 

</

head> 

< 

body> 

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

<div> 

State: 

          

<asp:DropDownList ID="ddl" runat="server"> 

</asp:DropDownList> 

<br /> 

<br /> 

County: 

       

<asp:DropDownList ID="DropDownList1" runat="server"> 

</asp:DropDownList> <br /> 

<br /> 

<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /></div> 

</form> 

</

body> 

</

html>

dharanighanta29-Jul-07 20:05

29-Jul-07 20:05

Hi paul,

I posted aspx source code but in that code i had two dropdownlist and one button control those controls are not displaying in the posted message.why it is not appearing?

Paul Conrad29-Jul-07 20:07

Paul Conrad

29-Jul-07 20:07

You may have to step through the code, cannot really tell where the problem is.

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

dharanighanta29-Jul-07 20:58

29-Jul-07 20:58

Hi Paul,

Just go through the below link

http://www.remapper.com/callback.aspx

In that i have two dropdownlists,I will select state from first dropdownlist then those counties will be appear in second dropdownlist without postaback of the page.I am getting but if i click the button for retreiving selected state and county value then county values are disappeared.

ballameharmurali30-Jul-07 1:52

ballameharmurali

30-Jul-07 1:52

hello dharini,
try to keep the countrydropdownlist in AutPostBack=True or otherwise how ur calling the values of the dropdownlist of country like that call that function int the button click event.

ok then u will get

byeee
Murali

Murali

dharanighanta30-Jul-07 2:02