ASP.NET

29-Mar-09 22:26

I have few Web forms with same controls but different data. Which design pattern is suitable in this scenario?
WebForm 1 (city.aspx) with combobox and grid control
WebForm 2 (state.aspx) with same controls i.e, combobox and grid
WebForm 3 (country.aspx) with same controls i.e, combobox and grid

the structure of 3 Web forms is similar only the content is different at run time.
Instead of 3 .aspx & .cs files i want to refactor and apply design pattern which would suite this scenario. Which design pattern to apply to refactor the code?

Re: ASP.net Web Forms

Christian Graus29-Mar-09 22:30

getting next xml node value

29-Mar-09 22:30

They have design patterns for grouping controls in web forms now ? I'd imagine if you have pages with the same controls, you could make it one page and change the data sources based on a query string parameter. Or you can create a control that you can set data sources for, and consume that in three pages. But, it's just two simple controls, I don't think it's worth it.

Christian Graus

Driven to the arms of OSX by Vista.

"I am new to programming world. I have been learning c# for about past four weeks. I am quite acquainted with the fundamentals of c#. Now I have to work on a project which converts given flat files to XML using the XML serialization method" - SK64 ( but the forums have stuff like this posted every day )

bhattiprolu29-Mar-09 21:48

bhattiprolu

29-Mar-09 21:48

hi,
i have next and previous buttons, when i click next i must get the next xml node value and if i click previous button it should display the previous node value. can anybody help in this regard.

Thanks in advance.

SeMartens29-Mar-09 21:58

SeMartens

29-Mar-09 21:58

If you have a XmlNode-instance you can use PreviousSibling and NextSibling.

Have a look here:

http://msdn.microsoft.com/de-de/library/system.xml.xmlnode.nextsibling.aspx[^]

Regards
Sebastian

It's not a bug, it's a feature!

Check out my CodeProject article Permission-by-aspect.

Me in Softwareland.

bhattiprolu29-Mar-09 23:08

bhattiprolu

29-Mar-09 23:08

hi, thanks for the help.

Actually i have a webpage which contains previous and next buttons.

in the same page i have a frame where i have to change the value of the iframe src depending on the previous and next buttons. the value will be taken from XML node values.

Please check the xml doc below.

<?xml version="1.0" encoding="utf-8" ?>
<portfolio>
<portfolios id="0808">
<src link="http://www.yahoo.com"></src>
</portfolios>
<portfolios id="0809">
<src link="http://www.gmail.com"></src>
</portfolios>
<portfolios id="0810">
<src link="http://www.codeproject.com></src>
</portfolios>
<portfolios id="0811">
<src link="http://www.xyz.com"></src>
</portfolios>
</portfolio>

and check my backend coding.

protected void imgbtnNext_Click(object sender, ImageClickEventArgs e)
{
//string crnturl = Request.Url.ToString();

XmlDocument doc=new XmlDocument();
XmlNode root = doc.LastChild;
if (root)
{
imgbtnNext.Enabled = false;
}
else
{
string myurl = Request.QueryString.Get("id").ToString();
XmlDataSource xsd = new XmlDataSource();
xsd.DataFile = "~/App_Data/portfolio.xml";
xsd.XPath = "portfolio/portfolios[@id='" + myurl + "']/src";
GridView ds = new GridView();
ds.DataSource = xsd;
ds.DataBind();
iframeprojects.Attributes.Add("src", ds.Rows[0].Cells[0].Text.ToString());
}
}

SeMartens29-Mar-09 23:39

SeMartens

29-Mar-09 23:39

Hmmm, seems a bit complicated. Why not loading the document and the use Xpath?

XmlDocument doc = new XmlDocument();
doc.Load("...");

XmlNode oCurNode = doc.SelectSingleNodes("portfolio/portfolios[@id='" + myurl + "']/src");
iframeprojects.Attributes.Add("src", oCurNode.Attributes["link"].InnerText);

Best would be to pass the id of the current node, so that you can find the next one.

Regards
Sebastian

It's not a bug, it's a feature!

Check out my CodeProject article Permission-by-aspect.

Me in Softwareland.

bhattiprolu30-Mar-09 0:03

bhattiprolu

30-Mar-09 0:03

hi thanks Sebastian,
Nut i didn't get how to get the next node value.

SeMartens30-Mar-09 1:54

SeMartens

30-Mar-09 1:54

Extend the code as following to get the next node id:

XmlDocument doc = new XmlDocument();
doc.Load("...");

XmlNode oCurNode = doc.SelectSingleNodes("portfolio/portfolios[@id='" + id + "']/src");
iframeprojects.Attributes.Add("src", oCurNode.Attributes["link"].InnerText);

// get next node (this will be a portfolio)
XmlNode oNextNode = oCurNode.NextSibling;
// get the id attribute
string sNextId = oNextNode.Attributes["id"].InnerText;

Then save the sNextId somewhere so that on the next button click you can use it.

Regards
Sebastian

It's not a bug, it's a feature!

Check out my CodeProject article Permission-by-aspect.

Me in Softwareland.

Frames or Master pages

nilam247729-Mar-09 21:31

Re: Frames or Master pages

29-Mar-09 21:31

I have Web application. In most of the forms Frames are used. We are planning to use Master pages instead of frames. Could you please let me know what are the advantages of using Master pages over frames?

N a v a n e e t h29-Mar-09 22:05

Re: Frames or Master pages

29-Mar-09 22:05

Frames are not supported by some of the browsers, or users are allowed to turn it off.

Navaneeth

How to use google | Ask smart questions

Christian Graus29-Mar-09 22:22

Binding GridView control with datasource

29-Mar-09 22:22

Well, for a start, they are totally different from each other. TOTALLY different.

nilam247729-Mar-09 21:27

Re: Binding GridView control with datasource

29-Mar-09 21:27

I have Grid view control and this control is associated with SqlDataSource. Is it advicable to always associate a control with data source. What are the disadvantages doing so?
I'm currently changing the design and implementing MVC pattern.
Thanks in advance

N a v a n e e t h29-Mar-09 22:13

29-Mar-09 22:13

nilam2477 wrote:
Is it advicable to always associate a control with data source

You mean associating controls like SqlDataSource? I don't recommend using SqlDataSource. It will force you to write SQL along with the markup. You will not get clean separation.

Smile | :)

Navaneeth

How to use google | Ask smart questions

Ajax problem?

Karthick_gc29-Mar-09 21:25

Karthick_gc

29-Mar-09 21:25

Hi, i created a first application using Ajax. I create a toolbar tab and get script manager control in the Master page. And then i used Ajaxcalendarextender in the design. But if i write code in the source it shows the following error.
<atk:calendarextender id="calImg" popupbuttonid="ImageButton1" targetcontrolid="TextBox1" runat="server" mode="hold" xmlns:atk="#unknown">

Unrecognized tag prefix or device filter 'ATK'.

Can anyone correct it?

Re: Ajax problem?

Christian Graus29-Mar-09 22:21

ASP.net Web pages refactoring

29-Mar-09 22:21

What does the error message tell you ? Where do you define the atk namespace ? do you have any idea what you're doing ?

nilam247729-Mar-09 21:11

Re: ASP.net Web pages refactoring

29-Mar-09 21:11

I have a ASP.net Web application. I have master pages. I have 5 web forms with same controls. At run time based on user selection each form is loaded.
I have one Web form (city.aspx) with combobox and grid control
i have 5 other web forms (state.aspx,etc) with same controls i.e, combobox and grid control.
When the user selects City, city.aspx form is loaded. similarly when user selects State, state.aspx form is loaded.
I want to refactor code. Instead of 5 seperate .aspx and .cs files i want to refactor. As the structure is similar and only during run time the web page is populated with different data. Which design pattern i can apply to refactor my code? Your help is appreciated. thanks in advance

Christian Graus29-Mar-09 22:33

Error: DataBinding: 'System.Data.DataRowView' does not contain a property with the name"xyx"

29-Mar-09 22:33

Please don't ask the same thing over and over, it's rude.

RajpootRohan29-Mar-09 21:09

RajpootRohan

29-Mar-09 21:09

Hi to all,
I am stucked in a problem and searched a lot.
But I am unable to resolve the issue.Please help me out.

Actually i have datalist in which there is column of "stock_on_hand".In the database table the value is "20". I want that if the stock in the database table is greater than "0" then in the datalist column it should show the text "In Stock". For this I did like this:

protected void Page_Load(object sender, EventArgs e)
{
    try
    {
        string snam = Session["na"].ToString();
        chi_id = Convert.ToInt32(Request.QueryString["c_id"]);
        get_names();
        //SqlConnection con = new SqlConnection("Server=.; Database=eclsc; Trusted_Connection=yes");
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["newcon"].ConnectionString);
        SqlCommand cmd = new SqlCommand();
        cmd.Connection = con;
        cmd.CommandText = "select product_id, image,price,sh_desc,case when stock_on_hand >0 then 'In Stock' else convert(nvarchar, stock_on_hand) end from " + snam + "  where child_id=@child_id";
        cmd.Parameters.Add("@child_id", SqlDbType.Int).Value = chi_id;
        SqlDataAdapter sda = new SqlDataAdapter(cmd);
        DataTable dt = new DataTable();
        con.Open();
        sda.Fill(dt);
        DataView dview = dt.DefaultView;
        DataList1.DataSource = dview;
        DataList1.DataBind();
        con.Close();
    }
    catch(SqlException se)
    {
        ErrHandler.WriteError(se.Message);
    }
    catch(Exception ee)
    {
        ErrHandler.WriteError(ee.Message);
    }
}

But it is giving an error:

DataBinding: 'System.Data.DataRowView' does not contain a property with the name "stock_on_hand" .

I am unable to solve the issue.Please assist me.

cheers,
sneha

Re: Error: DataBinding: 'System.Data.DataRowView' does not contain a property with the name"xyx"

N a v a n e e t h29-Mar-09 21:57

Re: Error: DataBinding: 'System.Data.DataRowView' does not contain a property with the name"xyx"

29-Mar-09 21:57

You need to add the alias name for that column as stock_on_hand.

select 
    product_id, image,price,sh_desc,
    case 
        when stock_on_hand > 0 then 'In Stock' 
        else convert(nvarchar, stock_on_hand) 
    end AS stock_on_hand 
from " + snam + "  where child_id=@child_id

OT : Are you aware of using statement in C#? Heard about dispose pattern? SqlConnection, SqlCommand, SqlDataAdapter and DataTable got a Dispose() method and you haven't called it. If dispose method is provided, it is a good practice to call it when you finish dealing with the object.

Smile | :)

Navaneeth

How to use google | Ask smart questions

RajpootRohan29-Mar-09 22:23

RajpootRohan

29-Mar-09 22:23

N a v a n e e t h wrote:
You need to add the alias name for that column as stock_on_hand.

Hi,

Thanks for your generous help.I am sorry I missed it. Now it is working fine.

N a v a n e e t h wrote:
OT : Are you aware of using statement in C#? Heard about dispose pattern? SqlConnection, SqlCommand, SqlDataAdapter and DataTable got a Dispose() method and you haven't called it. If dispose method is provided, it is a good practice to call it when you finish dealing with the object.

Now I will remember to use the dispose() after the work with the objects is completed. Thanks for youe suggestion. I will always keep in mind.

cheers,
sneha

How to handle the sessions in a website using C#.

pamsbeach29-Mar-09 20:54

pamsbeach

29-Mar-09 20:54

I am working on an application to post the data from my database to a particular website. For that after loging in im taking the URL of the website and adding on the values in the form of query string. But instead of going to the same page it navigates to the login page. Please suggest me how to handle that issue.

Thanks in advance,

aravind sarma

Re: How to handle the sessions in a website using C#.

Christian Graus29-Mar-09 20:56

Re: How to handle the sessions in a website using C#.

29-Mar-09 20:56

What on earth does this have to do with the sessions ?

N a v a n e e t h29-Mar-09 21:47