ASP.NET

Re: Interesting problem - Interaction between controls on a page and controls embeded within a user control

26-Sep-08 16:20

Hello guys and thanks for your response. It seems like both of you guys are talking along the same lines but I still cant get this to work.

T7bros, as you mentioned above, I added the code Button1.Attributes.Add("onclick", "MoveFocus('" & userControl1.Controls("textbox1").clientID & "');") in the page's load event handler.

Here's what I've added:

addButton.Attributes.Add("onclick", "MoveFocus('" + pumpassembly.FindControl("_installationDateTextBox").ClientID + "');");

I'm adding the Javascript function as you menioned in the aspx page under script block:
:

function MoveFocus(TextName)
{
var txt = document.getElementById(TextName);
txt.Focus();
}

When I set a break point, it looks like its blowing up at ("_installationDateTextBox").ClientID meaning either its not finding this text box control on the user control or there's an issue with the client ID. Also _installationDateTextBox is the ID of that text box that needs to have the focus when the button gets clicked, they why are we doing .ClientID? Any ideas whats going on here?

Thanks
Tina

AlexeiXX326-Sep-08 17:14

Re: Interesting problem - Interaction between controls on a page and controls embeded within a user control

26-Sep-08 17:14

Tina P wrote:
it looks like its blowing up at ("_installationDateTextBox").ClientID

Make sure that _installationDateTextBox exists, it should work, if you are getting an exception, it must be because no control has been found and nothing is being returned which doesnt have a clientid property

A most secure way to access controls inside a user control is to expose controls as properties
Just create a public readonly property that returns the textbox you want
Then, youll be able to reference that textbox like: pumpassembly.myTextbox.focus;

If you still get the same error (null reference), it could also be that the textbox hasnt been created yet and you might need to read a little about EnsureChildControls

Alexei Rodriguez

Tina P26-Sep-08 21:04

Re: Interesting problem - Interaction between controls on a page and controls embeded within a user control

26-Sep-08 21:04

Hello there, Yes you are correct...it's throwing a NullReferenceException (pointing towards the clientID property). And to answer your question, yes "installationDateTextBox" (which is just the ID of the text box located in the ascx file) is found because when I try to see what's present in the myUserControl inside the debugger, I see all the controls that are embedded in myUserControl including the installationDateTextBox. But apparenetly it's not grabbing the clientID and therefore has Null in the paremeter list for MoveFocus function.

_

addButton.Attributes.Add("onclick", "MoveFocus('" + myUserControl.FindControl("_installationDateTextBox").ClientID + "')");

What am I doing wrong here you guys???

Thanks
Tina

AlexeiXX327-Sep-08 10:27

Re: Interesting problem - Interaction between controls on a page and controls embeded within a user control

27-Sep-08 10:27

Tina P wrote:
And to answer your question, yes "installationDateTextBox" (which is just the ID of the text box located in the ascx file)

Whats the name of the control, installationDateTextBox or _installationDateTextBox??
Post the sourcecode of your ascx file

Tina P wrote:
myUserControl.FindControl("_installationDateTextBox")

This must return a control, and all controls have a clientid property, the exception must be because the control is not found and not because of the clientid property

Alexei Rodriguez

Tina P27-Sep-08 11:45

Re: Interesting problem - Interaction between controls on a page and controls embeded within a user control

27-Sep-08 11:45

Hey Alexei, thanks for the response.

The answer to the question: Whats the name of the control, installationDateTextBox or _installationDateTextBox??" is:

- Assuming that by the name of the control, you are actually referring to the ID of the text box control, Yes it is "_installationDateTextBox" as shown below.

<asp:textbox id="_installationDateTextBox" runat="server" width="91px" xmlns:asp="#unknown"></asp:textbox>

As far as the code behind of this ascx file, all I'm doing there is setting the text property of this control.

_installationDateTextBox.Text = DataAccessLayer.DataSource.getReaderByIdForInstall(assemblyID);

The assemblyId is being retrieved from the database on the apsx page itself, so I'm passing it to the control by using a public property.

The weird thing is that when I try to find a control which is located on the page itself (aspx file) by doing something like the following:
Control temp = FindControl("InfoLinkButton");

It works fine, you can see the temp variable here with the actual LinkButton control and all its properties in the debugger. But when I replace the InfoLinkButton control with _installationDateTextBox (which is located on the ascx file) then the temp would have Null, meaning its not found??? That's just bizarre! Here's the code:

Control temp1 = myUserControl.FindControl("_installationDateTextBox"); (temp1 is Null when this line execute)

What am I doing wrong here Frown | :(

Tina

AlexeiXX327-Sep-08 12:54

Re: Interesting problem - Interaction between controls on a page and controls embeded within a user control

27-Sep-08 12:54

Expose your control as a public property for your usercontrol

Also, paste the sourcecode of your usercontrol

Alexei Rodriguez

Tina P27-Sep-08 14:10

Re: Interesting problem - Interaction between controls on a page and controls embeded within a user control [modified]

27-Sep-08 14:10

public partial class UserControls_PumpAssembly : System.Web.UI.UserControl
{

    //public static Int32 wellID;
    //public static Int32 assemblyID;
    //public event SelectedIndexChangedforWellEventHandler IndexChangedforWell;
    //public event SelectedIndexChangedforAssemblyEventHandler IndexChangedforAssembly;

    int assemblyID;

    public void Assemblyid(int val)
    {

        //hiddenLabel.Text = Convert.ToString(val);
        assemblyID = val;

    }
   
    protected void Page_Load(object sender, EventArgs e)
    {
        _modelTextbox.Text = DataAccessLayer.AssemblyDataSource.getSensorModelbyUsingAssemblyID(assemblyID);
        _serialNumTextBox.Text = DataAccessLayer.AssemblyDataSource.getSensorSerialNumberbyUsingAssemblyID(assemblyID);
        _installationDateTextBox.Text = DataAccessLayer.AssemblyDataSource.getReaderByAssemblyIdForInstall(assemblyID);
    }

    

    protected void gasSeparatorddl_OnselectedIndexChanged(object sender, EventArgs e)
    {
        DataAccessLayer.AssemblyDataSource.InsertGasSeparationAbility(assemblyID);
    
    }

This is pretty much all the code I have in the code behind of the user control. As you can see I'm just setting the text properties of a few controls including the installtiondate.

Can you show me using an example what exactly are you suggesting as far as exposing them as properties please?

Thanks sooo much.
Tina

AlexeiXX327-Sep-08 16:55

Re: Interesting problem - Interaction between controls on a page and controls embeded within a user control

27-Sep-08 16:55

Code to expose your textbox as a property an just call it from the page where the control is like myUserControl.installationDateTextBox

public TextBox installationDateTextBox
{
    get { return this._installationDateTextBox; }
}

Tina P wrote:
protected void Page_Load(object sender, EventArgs e) { _modelTextbox.Text = DataAccessLayer.AssemblyDataSource.getSensorModelbyUsingAssemblyID(assemblyID); _serialNumTextBox.Text = DataAccessLayer.AssemblyDataSource.getSensorSerialNumberbyUsingAssemblyID(assemblyID); _installationDateTextBox.Text = DataAccessLayer.AssemblyDataSource.getReaderByAssemblyIdForInstall(assemblyID); }

Unless you have a reason to read this from the DB each time, you should include that code inside a page.ispostback condition

In my previous post, I meant your source code (.ascx) and not the code behind (.ascx.cs)

Alexei Rodriguez

modified on Saturday, September 27, 2008 11:01 PM

Tina P28-Sep-08 0:28

Re: Interesting problem - Interaction between controls on a page and controls embeded within a user control

28-Sep-08 0:28

Hello there,

Thanks for the example...i tried to use the read only property as you mentioned above and accessed the text box from the page's code behind in this way TextBox textBx = pumpassembly.installationDateTextBox;

technically it should have the text box control in the textBx variable when I step through this code, but it returns NULL just as it was before when I was using FindControl approach????

By the way, just an FYI, I'm loading these user controls in the pre_render event...so they don't get loaded in the page load...anyways, but the code TextBox textBx = pumpassembly.installationDateTextBox; is being executed from a button called ADD on the page (Add buttons click event handler). The reason I'm mentioning this is because all of a sudden it occurred to me that what if the user control (whose text box we are trying to access) is not loaded at the time, but that's not true because the page has already been loaded at this time once and that's when user clicks the Add button. I'm sooooo confused Frown | :(

Also sorry i must have misunderstood, here is the ascx code you asked for.

<div style="margin-bottom: inherit; bottom:inherit; margin-top: inherit; position: relative; display: block;<br mode=" hold=" />    float: left; border-style:None; width: 600px; height:300px">
    <div style="position: relative; float: left;">
        <asp:label id="pumpAssemblyLabel" runat="server" font-bold="true" text="General Information" xmlns:asp="#unknown"></asp:label>    </div>
    
<asp:label id="_installationDateLabel" runat="server" text="Installation Date" xmlns:asp="#unknown"></asp:label>
    <asp:textbox id="_installationDateTextBox" runat="server" width="91px" xmlns:asp="#unknown"></asp:textbox>
    
    <asp:label id="_manufacturerLabel" runat="server" text="Manufacturer" xmlns:asp="#unknown"></asp:label>
    
    <asp:dropdownlist id="_manufacturerDropdown" runat="server" appenddatabounditems="True" xmlns:asp="#unknown">
        DataSourceID="Manufacturerds" DataTextField="ManufacturerName" DataValueField="ManufacturerID">
        <asp:listitem>---Select One---</asp:listitem>
    </asp:dropdownlist>
    <asp:objectdatasource id="Manufacturerds" runat="server" typename="DataAccessLayer.ManufacturerDataSource" xmlns:asp="#unknown">
        SelectMethod="GetManufacturerUsingDB"></asp:objectdatasource>
    <br />
    <asp:label id="_modellabel" runat="server" text="Model" xmlns:asp="#unknown"></asp:label>
    
    <asp:textbox id="_modelTextbox" runat="server" width="111px" xmlns:asp="#unknown"></asp:textbox>
    
    <asp:label id="_serialNumLabel" runat="server" text="Serial Number" xmlns:asp="#unknown"></asp:label>
    <asp:textbox id="_serialNumTextBox" runat="Server" width="113px" xmlns:asp="#unknown"></asp:textbox>
    <br /></div>

Thanks
Tina

AlexeiXX328-Sep-08 5:51

Question regarding formatting/ displaying data in a drop down list

28-Sep-08 5:51

Tina P wrote:
I'm loading these user controls in the pre_render event...so they don't get loaded in the page load

What do you mean by this??
Prerender is of the last events in the page, after handling any licks, selectedindexchanged and so on

Anyways, i dont know what might be causing the problem, i made a really basic example

UserControl:

.ascx
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="WebUserControl.ascx.cs" Inherits="Test_WebUserControl" %>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br />
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>

Page:

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

<%@ Register Src="WebUserControl.ascx" TagName="WebUserControl" TagPrefix="uc1" %>

<!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>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <uc1:WebUserControl ID="WebUserControl1" runat="server" />
    
    </div>
    </form>
</body>
</html>

.aspx.cs
using System;
using System.Data;
using System.Configuration;
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;

public partial class Test_WebUserControl : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        TextBox txt = this.WebUserControl1.FindControl("TextBox1") as TextBox;
        txt.Text = "Something";
    }

    protected void Page_Prerender(object sebder, EventArgs e)
    {
        //TextBox txt = this.WebUserControl1.FindControl("TextBox1") as TextBox;
        //txt.Text = "Something";
    }
}

I tryed setting the text property in the prerender and it also worked

Alexei Rodriguez

Tina P26-Sep-08 0:41

Re: Question regarding formatting/ displaying data in a drop down list

26-Sep-08 0:41

hey guys, I have a drop down list which is supposed to show a combination of two dates (lets say insert date and pull date) separated by a underscore or something. The problem is that I only want the date to be shown and not the time (it's putting in a default time 12 AM in there) Now I could call ToShortDateString on the date that is being returned if I only had a single date coming back but since I'm getting a SQLDataReader object back, I can't even call that on it.

here is the code that I'm using:

public static SqlDataReader getDatesByWellId(Int32 wellId)
        {
            string dsn = System.Configuration.ConfigurationManager.ConnectionStrings["AMasterConnectionString1"].ConnectionString;
            SqlConnection conn = new SqlConnection(dsn);
            String query = "Select Convert(Varchar,InstallDate)+'  '+Convert(Varchar,PullDate) As DateInfo  From tblAssemblyMaster With (NoLock) Where WellId=" + wellId + " " + "Order By InstallDate Asc";
            SqlCommand cmd = new SqlCommand(query, conn);
            conn.Open();
            SqlDataReader sdr = cmd.ExecuteReader();

            return sdr;
        }

Is there anything that I can do to fix this? Like I said earlier all I wanna display is a date range for instance something like this: 4/11/2007 - 6/19/2008. Can someone shed some light on this!

Thanks
Tina

NeverHeardOfMe26-Sep-08 0:50

Re: Question regarding formatting/ displaying data in a drop down list

26-Sep-08 0:50

Select Convert(Varchar,InstallDate,105)+' - '+Convert(Varchar,PullDate,105) As DateInfo ...etc

Tina P26-Sep-08 21:05

server.tranfer path error

26-Sep-08 21:05

Thanks for your help, I just started working with .Net and didn't even know about those formatting values. I appreciate your help!

Tina

imranafsari26-Sep-08 0:26

imranafsari

26-Sep-08 0:26

Dear All,
I am using C# , Asp.net2.0
I am using server.tranfer to redirect the another webpage with parameter
I have root folder and my aspx file is inside another folder in root that is root -> folder -> test.aspx

Now I am using following code redirect as
Server.Transfer("/Demo/FrmChecklist.aspx", true);
But I am getting error as path not mapping

Please suggest

imran khan

Re: server.tranfer path error

droth1726-Sep-08 1:54

droth17

26-Sep-08 1:54

Try

Server.Transfer("~/Demo/FrmChecklist.aspx", true);

Check checkbox values in checkboxlist from database help (c#)

AdamskiR26-Sep-08 0:11

AdamskiR

26-Sep-08 0:11

Hi,

I have a checkboxlist which i pull the options from a database on the page and I have got it submitting multiple checked values into the database, but im having problems creating the page to display which values have been checked. Could someone please help?

The look up table is:

Table - refCommittee

CommitteId - int
CommitteeName - varchar
Active - bit

The table holding inserted values

Table - tblApprovingCommGroup
ID - int
PolicyID - int
CommitteID - int

Many thanks Blush | :O

Get file name out of path

varsh1226-Sep-08 0:01

varsh12

26-Sep-08 0:01

i want to display the file name not whole path in asp.net C#.
I use datalist and in datalist i have taken link button to show the file name. my path storedin database.

thanks

Re: Get file name out of path

NeverHeardOfMe26-Sep-08 0:07

Re: Get file name out of path

26-Sep-08 0:07

You're not having much luck with this, are you?

to extract filename.ext out of str = "drive/folder/path/filename.ext" try

str.SubString(str.LastIndexOf("/") + 1)

J4amieC26-Sep-08 0:35

J4amieC

26-Sep-08 0:35

He's already been told the right way numerous times

string str = "drive/folder/path/filename.ext";
string filename = Path.GetFilename(str);

Re: Get file name out of path

NeverHeardOfMe26-Sep-08 0:45

Replace function is not working on ASP

26-Sep-08 0:45

J4amieC wrote:
string filename = Path.GetFilename(str);

Yes, that works too! Do you know, I never thought ot try that on a simple string - just assumed the argument needed to have been defined through a file object (or HttpPostedFile or something)... how embarrassing Blush | :O

Amit Battan Ror25-Sep-08 23:00

Amit Battan Ror

25-Sep-08 23:00

Hi All

I am using Replace in Old ASP
and its not working

I am using

Replace cont,"my_documents/","master/my_documents/"

and It not replace the text

any body have solution

Amit Battan Ror
battan20@gmail.com

Re: Replace function is not working on ASP

NeverHeardOfMe25-Sep-08 23:28