passing data to another form - C# Discussion Boards

IVR (Interactive Voice Response)

23-Jul-06 10:44

arun.m wrote:
Anybody can tell me what can i do for remove these errors from the program.

Well, I have an ISP, but I don't have ESP, so I guess you need to post the code. Then I need to ask, what are you writing it for ? If for a class, fair enough. But don't USE your linked list, use the containers built into the framework.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

mohsen_dez23-Jul-06 7:03

mohsen_dez

23-Jul-06 7:03

Hi I Want To create an IVR (Interactive Voice Response) Application in C#
can anybody help me to find some source code or guide me to write that.
thanks

passing data to another form

simsen23-Jul-06 5:21

23-Jul-06 5:21

Hi,

I have the following code, which works perfect, when I makes af DataGridView with drag and drop (the code pass over the FakturaId to the new form, so I can make a select on this)

System.Data.DataRowView SelectedRowView;

fakturasystemDataSet.FakturaRow SelectedRow;

SelectedRowView = (System.Data.DataRowView)fakturaBindingSource.Current;

SelectedRow = (fakturasystemDataSet.FakturaRow)SelectedRowView.Row;

FakturaVis FakturaVisForm = new FakturaVis();

FakturaVisForm.LoadFakturaVis(SelectedRow.FakturaID);

FakturaVisForm.Show();

But now I have made my own dataset and adapter and I have some problems with the above code. I don't know, how I get the FakturaRow in intellisense (how I get this into the code, where I instansiate the dataset and the adapter)?

Is my dsView the same as, the system generated fakturaBindingSource?

My code where I instansiate the dataset and the adapters:

private void loadKundeFaktura()

{

//create a connection string to the access database

OleDbConnection cn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;

User Id=;Password=;

Data Source=" + myDB);

// Create the DataSet

ds = new DataSet("KundeFaktura");

// Fill the Dataset with Kunder, map Default Tablename

// "Table" to "Kunder".

da1 = new OleDbDataAdapter("SELECT KundeId, Navn, Adresse, Postnr, Byen,
Telefonnr, Mobilnr, EmailAdr, Noter FROM Kunder", cn);

da1.TableMappings.Add("Table", "Kunder");

da1.Fill(ds);

// Fill the Dataset with Faktura, map Default Tablename

// "Table" to "Faktura". ORDER BY FakturaID DESC

da2 = new OleDbDataAdapter("SELECT FakturaID, KundeID, Dato, BetalingsDato,
Betalt FROM Faktura ORDER BY FakturaID DESC", cn);

da2.TableMappings.Add("Table", "Faktura");

da2.Fill(ds);

// Establish the Relationship "RelOrdDet"

// between Kunder ---< [Faktura]

System.Data.DataRelation relOrdDet;

System.Data.DataColumn colMaster2;

System.Data.DataColumn colDetail2;

colMaster2 = ds.Tables["Kunder"].Columns["KundeId"];

colDetail2 = ds.Tables["Faktura"].Columns["KundeID"];

relOrdDet = new System.Data.DataRelation("RelOrdDet", colMaster2,
colDetail2);

ds.Relations.Add(relOrdDet);

// The DataViewManager returned by the DefaultViewManager

// property allows you to create custom settings for each

// DataTable in the DataSet.

dsView = ds.DefaultViewManager;

// Databinding for the Grid's

dgrKunder.DataSource = dsView;

dgrKunder.DataMember = "Kunder";

dgrFaktura.DataSource = dsView;

dgrFaktura.DataMember = "Kunder.RelOrdDet";

}

Kind regards,
simsen Smile | :)

Christian Graus23-Jul-06 10:45

23-Jul-06 10:45

I don't understand the question. Why do you need intellisense ? If you've passed the ID, you can request the data from the database, surely ? Otherwise, communication between forms typically happens with delegates, or is this ASP.NET ?

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

simsen23-Jul-06 20:00

23-Jul-06 20:00

It isn't ASP.NET.

I have to pass the Id to another form.

Normally I would do it this way: I drag and drop a datagridview (AND use the Visual Studios wizard to make the connection and so on) into form1 and then I use the below code1 on a button, to pass the id with it.

But my problem is (I'm a very newbee), I tried instead of using the wizard to make my own connection to the database and put data into the datagridview. See code2.

Now I don't know what I shall do, to pass the id over to form2. On form2 I have som fields, which i also get from the database - but I cann't get them, don't have have the id.

Kind regards,
simsen Smile | :)

Code1:
System.Data.DataRowView SelectedRowView;

fakturasystemDataSet.FakturaRow SelectedRow;

SelectedRowView = (System.Data.DataRowView)fakturaBindingSource.Current;

SelectedRow = (fakturasystemDataSet.FakturaRow)SelectedRowView.Row;

FakturaVis FakturaVisForm = new FakturaVis();

FakturaVisForm.LoadFakturaVis(SelectedRow.FakturaID);

FakturaVisForm.Show();

Code2
private void loadKundeFaktura()

{

//create a connection string to the access database

OleDbConnection cn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;

User Id=password=;

Data Source=" + myDB);

// Create the DataSet

ds = new DataSet("KundeFaktura");

// Fill the Dataset with Kunder, map Default Tablename

// "Table" to "Kunder".

da1 = new OleDbDataAdapter("SELECT KundeId, Navn, Adresse, Postnr, Byen,
Telefonnr, Mobilnr, EmailAdr, Noter FROM Kunder", cn);

da1.TableMappings.Add("Table", "Kunder");

da1.Fill(ds);

// Fill the Dataset with Faktura, map Default Tablename

// "Table" to "Faktura". ORDER BY FakturaID DESC

da2 = new OleDbDataAdapter("SELECT FakturaID, KundeID, Dato, BetalingsDato,
Betalt FROM Faktura ORDER BY FakturaID DESC", cn);

da2.TableMappings.Add("Table", "Faktura");

da2.Fill(ds);

// Establish the Relationship "RelOrdDet"

// between Kunder ---< [Faktura]

System.Data.DataRelation relOrdDet;

System.Data.DataColumn colMaster2;

System.Data.DataColumn colDetail2;

colMaster2 = ds.Tables["Kunder"].Columns["KundeId"];

colDetail2 = ds.Tables["Faktura"].Columns["KundeID"];

relOrdDet = new System.Data.DataRelation("RelOrdDet", colMaster2,
colDetail2);

ds.Relations.Add(relOrdDet);

// The DataViewManager returned by the DefaultViewManager

// property allows you to create custom settings for each

// DataTable in the DataSet.

dsView = ds.DefaultViewManager;

// Databinding for the Grid's

dgrKunder.DataSource = dsView;

dgrKunder.DataMember = "Kunder";

dgrFaktura.DataSource = dsView;

dgrFaktura.DataMember = "Kunder.RelOrdDet";

}

Christian Graus23-Jul-06 21:11

23-Jul-06 21:11

How does form2 get created ? Surely it's from form1, in which case you can pass the ID through the constructor ?

The problem with all the wizard garbage in .NET 2.0 is that you can get so far, then you hit a brick wall and realise you do need to learn all the stuff the framework has been taking care of for you.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

simsen24-Jul-06 1:23

24-Jul-06 1:23

Hi Christian

First thanks for helping me. I'm totally lost here, and I don't know what to do.

Yes I found out, I couldn't use the wizard to do the things I will. So no I'm leaning myself the hard way, by trying to make a program for my friend.

I think I use a constructer (if I understand the book I use correctly which means a constructor is when I make a "new" statement). See the below code.

I have to problems. I don't know how to get the Id from the datagridview I stand on. And then to pass that with the constructer.

If you want to see all the code etc, you can get it here: http://www.ansi-design.dk/ANSI.zip[^]

The button (constructer) I use to open the form2 with code:

private void btnFakturaVis_Click(object sender, EventArgs e)<br />
            {<br />
                //The below code I used, when I had only one datagridview and used the wizard<br />
                //System.Data.DataRowView SelectedRowView;<br />
                //fakturasystemDataSet.FakturaRow SelectedRow;<br />
 <br />
                //SelectedRowView = (System.Data.DataRowView)fakturaBindingSource.Current;<br />
                //SelectedRow = (fakturasystemDataSet.FakturaRow)SelectedRowView.Row;<br />
                //FakturaVis FakturaVisForm = new FakturaVis();<br />
                //FakturaVisForm.LoadFakturaVis(SelectedRow.FakturaID);<br />
                //FakturaVisForm.Show();<br />
<br />
<br />
                //This code I initialize the FakturaVisForm with<br />
                //I here miss how to get the FakturaId from grdFaktura - dataset (ds) <br />
                //dataadapter (da2)<br />
                FakturaVis FakturaVisForm = new FakturaVis();<br />
                FakturaVisForm.Show();<br />
            }

Christian Graus24-Jul-06 10:19

24-Jul-06 10:19

Ah... OK.

Now, any class has a constuctor which is auto generated and takes no parameters. To pass parameters, you need to write another constructor. So, you have this

class FakturaVis
{
public FakturaVis ()
{
}
}

That's a class with an empty constructor. This may not even be in your code, if it's not, it gets inserterted. If you want to force people to pass an int value over, do this:

class FakturaVis
{
private int ID;
private FakturaVis ()
{
}

public FakturaVis (int ID)
{
this.ID = ID;
}
}

The name you pass in does not have to be the same as the one you store, but if it is, this will allow you to scope it properly. I've made the default constructor private, as I can't stop it being generated, private stops it being used. Then I've added a constructor which I can pass the ID in to. Now when you call new, you need to pass that ID, and you now have it within your new class instance.

To get the ID, I assume you're responding to a row being selected, the datagrid will have a selected row property, and then you can access the columns by index or name.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

simsen24-Jul-06 10:43

24-Jul-06 10:43

Thank you very very much. That was exactly what I needed. Now I can pass my id to form2. And thank you for having the patient with a newbee like me, who doesn't know the correct way to explain myself.

Kind regards,
simsen Smile | :)

Christian Graus24-Jul-06 10:46

type cast socket into stream

24-Jul-06 10:46

Glad to help. I'm self taught myself, which means I learned from asking in forums like these, myself.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

duaaali23-Jul-06 4:22

duaaali

23-Jul-06 4:22

Hi can anyone tell me how a socket can be type cast into stream , is it possible.
thanks

Re: type cast socket into stream

mav.northwind23-Jul-06 4:51

mav.northwind

23-Jul-06 4:51

Hi!
No, it's not possible.
A socket is a socket, a stream is a stream.

Regards,
mav

--
Black holes are the places where god divided by 0...

Re: type cast socket into stream

RizwanSharp23-Jul-06 7:42

RizwanSharp

23-Jul-06 7:42

Socket is not a stream but you can get underlying stream of socket using this code:

NetworkStream ns = Socket.GetStream();

rizwanSharp;

Unit-testing events [modified]

WillemM23-Jul-06 2:39

WillemM

23-Jul-06 2:39

I have been fooling around with unit-tests, and I was wondering if there is a good way to unit-test if events get fired properly? And is it wise to test these?

I think it's smart to test them, since you want to be as complete as possible when unit-testing.

WM.

What about weapons of mass-construction?

-- modified at 8:41 Sunday 23rd July, 2006

Re: Unit-testing events

Roger Alsing24-Jul-06 2:04

Roger Alsing

24-Jul-06 2:04

Yes its very easy atleast if you use .net 2.

you can do things like this:

public void MyTest<br />
{<br />
     ClassToTest klass = new ClassToTest();<br />
     bool eventFired = false;<br />
     klass.SomeEvent += delegate { eventFired = true; };<br />
     klass.DoStuff();<br />
     <br />
     assert.IsTrue(eventFired);<br />
}

This might look impossible at first sight since "eventFired" seems to be out of scope in the delegate.

However , the c# compiler is kind enough to do some magic for us , packing our bool in a dispatch class.

so it works very well and Im using it all the time.

//Roger

http://www.puzzleframework.com

Re: Unit-testing events

WillemM24-Jul-06 2:12

WillemM

24-Jul-06 2:12

Duh, I did forget anonymous delegates existed Smile | :)

Thanks for the info, this should solve the problem.

WM.

What about weapons of mass-construction?

Help how to automatic install FrameWork when PC run my programme without FrameWork

breaklxx23-Jul-06 2:07

breaklxx

23-Jul-06 2:07

Hi,
I want to let my programme run in some PC without FrameWork,so i want in my Install Project,Automatic check the system if FrameWork installed,if not,it can install it but not from internet,i want to intergrate it in my Install file,how can i did this?thanks for answers~~ WTF | :WTF:

Re: Help how to automatic install FrameWork when PC run my programme without FrameWork

Christian Graus23-Jul-06 10:46