C# Discussion Boards - CodeProject

Re: Solving (string) and creating the screen - Ex.: CreateScreen("screenTest")

8-Feb-10 4:06

Friends,

I hope you can help me. I am developing a new project and this project I have several screens. Well, I would like to create a screen through her name and that name is the same class name of the screen.

Example:

I create a new screen, and put her name as formCadastro. Now, in my base form, I would go to a function the string value "formCadastro" function and open the screen with the same name.

Is it possible? I tried to work a little with the System.Windows.Forms.Form class but I could not ... Thank you for your help.

Success for All

Not Active8-Feb-10 4:20

Not Active

8-Feb-10 4:20

Like this[^] ?

I know the language. I've read a book. - _Madmatt

Re: Solving (string) and creating the screen - Ex.: CreateScreen("screenTest")

User 68218818-Feb-10 4:38

Re: Solving (string) and creating the screen - Ex.: CreateScreen("screenTest")

8-Feb-10 4:38

Friend, it would be nearly so. But I wanted something simpler. There is to create a container of the screens?
I am studying the example. Thanks

V.8-Feb-10 4:24

8-Feb-10 4:24

Have you tried a switch statement?

switch(inputname){
  case "Screen1": Screen1 s1 = new Screen1();
  s1.ShowDialog(); 
  break;

  case "Screen2": Screen2 s2 = new Screen2();
  s2.ShowDialog(); 
  break;

  // continue

  default: // add a default situation.
  break;
}

Re: Solving (string) and creating the screen - Ex.: CreateScreen("screenTest")

User 68218818-Feb-10 4:37

Re: Solving (string) and creating the screen - Ex.: CreateScreen("screenTest") [modified]

8-Feb-10 4:37

Friend, this will not work.
There are many screens, and would like to develop a generic method.

Thanks!

rhuiden8-Feb-10 4:43

rhuiden

8-Feb-10 4:43

I would use something like this...

	private void CreateScreen(string FullName, params object[] args)
{
    Type t ;
    Form f;
    
    t = Type.GetType(FullName);
    
    if (t != null) {
        f = Activator.CreateInstance(t, args) as Form;
        if (f != null) {
            f.Show();
        }
    }
}

This would also allow you to pass arguments to the constructor. You may also have to pass the Full name of the Form including the Namespace. I don't remember how Type.GetType() works.

Edit: Sorry, forgot I was in C#.

modified on Monday, February 8, 2010 11:02 AM

Re: Solving (string) and creating the screen - Ex.: CreateScreen("screenTest")

User 68218818-Feb-10 11:47

Multiple Clients Running One Server Application

8-Feb-10 11:47

Perfect! Thanks Brother
Sucess!

controls in richtextbox

asdf232118-Feb-10 3:19

asdf23211

8-Feb-10 3:19

Hi,

I have got a serious problem. I have connect a table with the windows form. The table looks like

Id name age place country

1 sss 11 ttt qqq

2 ww 12 eee qqq

Now I'm able to display all of them in a richtextbox in the following format whose country = qqq

1.

Id ="1"

Name = "sss"

age =11

place = "ttt"

country = "qqq"

2.

Id ="2"

Name = "ww"

age =12

place = "eee"

country = "qqq"

now i add a linklabel control to the textbox. the text of the linklabel wiill be the result of Name column when on click it is linked to a webpage.

here my problem is it is not scrolling along with text.

this is how my code looks :

public void button3_Click(object sender, EventArgs e)
{
OdbcCommand bcC2 = new OdbcCommand();
bcC2.CommandText = "select * from C_RefCitation where c_id like ('" + textBox5.Text + "')";
bcC2.Connection = OdbcCon;
DataSet q3 = new DataSet();
OdbcDataAdapter db1A2 = new OdbcDataAdapter(bcC2);
db1A2.Fill(q3);
dataGridView1.DataSource = q3.Tables[0];
richTextBox2.Visible = true;
richTextBox2.Clear();
for (int x = 0; x < dataGridView1.Rows.Count - 1; x++)
{

richTextBox2.AppendText((x + 1).ToString() + ". ");

for (int y = 0; y < dataGridView1.Columns.Count; y++)
{
richTextBox2.AppendText("\n");
richTextBox2.AppendText(dataGridView1.Columns[y].HeaderText);
richTextBox2.AppendText(" : ");
if (dataGridView1.Columns[y].HeaderText.ToString() == "c_CitationDOI")
{

this.richTextBox2.SelectionStart = this.richTextBox2.TextLength;
int index = richTextBox2.Text.Length;
Point position = richTextBox2.GetPositionFromCharIndex(index);
LinkLabel label = new System.Windows.Forms.LinkLabel();
RichTextBox sri = new System.Windows.Forms.RichTextBox();
label.Text = dataGridView1.Rows[x].Cells[y].Value.ToString();
label.AutoSize = true;
label.Location = new Point(0,position.Y);
label.LinkBehavior = LinkBehavior.NeverUnderline;
richTextBox2.Controls.Add(label);
richTextBox2.AppendText(label.Text);
label.Links.Add(1, 7, dataGridView1.Rows[x].Cells[y].Value.ToString());
label.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.label_LinkClicked);
}
else
{
richTextBox2.AppendText(dataGridView1.Rows[x].Cells[y].Value.ToString());
}
if (y != dataGridView1.Columns.Count - 1)
{

richTextBox2.AppendText(", ");
}
}
richTextBox2.AppendText("\n\n\n ");
}

}

please help me in modifying this code so that the controls scroll along with text box.

Thank you very much

Bob Steel-Smith8-Feb-10 3:16

Re: Multiple Clients Running One Server Application

8-Feb-10 3:16

Hello all.
I have an ASP.Net application that scans input then collects other data from SQL 2005 DB. This data is then required to be sent to a server application that "Captures" the information into an ERP application. The "Capturing" app takes +- 30 seconds to run for each transaction. The Scanning App should be virtually insantaneous so we cannot wait for the Server app to run. The problem is that there are 25 clients scanning about 20000 transactions per day. This means that I need 166 hours to process all transactions or run eight server applications. Does Anyone know what the best method would be to handle these transactions?
Thanks in Advance for your Assistance.

Keith Barrow8-Feb-10 3:42

Re: Multiple Clients Running One Server Application

8-Feb-10 3:42

Without understanding your the architecture very well, the thing that jumps out for me is this:

Bob Steel-Smith wrote:
I have an ASP.Net application that scans input then collects other data from SQL 2005 DB. This data is then required to be sent to a server application that "Captures" the information into an ERP application. The "Capturing" app takes +- 30 seconds to run for each transaction.

The thing that is probably hammering you is the collection of supplementary data from the SQL server. Can any of this be cached (ie is it Lookup style data), if so you should. It might also be better to take the load of this from the client to the server (and just send up the input).

The system seems slow, given that only 20000 transactions are being processed. As a comparison we receieve an XML file containing ~.5GB data consisting of millions of records, which we run through in ~ 15 mins, and we aren't exactly running on a beofwulf cluster.

Antoine de Saint-Exupery: Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.

Bob Steel-Smith8-Feb-10 4:23

Re: Multiple Clients Running One Server Application

8-Feb-10 4:23

Hi, The Server app is the slow one where it is actually typing in the data into the ERP application through the ERP client. (I hope thats not too confusing) What I have done in the past is to scan the input directly into a table which is the end of the users input so this is extremly quick. From there I scheduled three similar applications (each selecting unique data) running on the server every three minutes. The amount of rows selected from the "Source" table was limited so the server apps would stop and start during the day. For the system to process all the data I would need 8 of these applications. What I am trying to do is have one server application that can run eight instances at the same time. I hope this serves to clarify my problem further, Thanks.

Keith Barrow8-Feb-10 5:23

Re: Multiple Clients Running One Server Application

8-Feb-10 5:23

So as I understand it, the real problem is this:

Bob Steel-Smith wrote:
The Server app is the slow one where it is actually typing in the data into the ERP application through the ERP client

We have a similar "Screen Scraper" running against telnet and our "big iron" server. Such tecnology is terrible, slow and flaky (at least in my experience). The best solution is, as you suggest, to by pass the client altogether and access the database directly. This will was orders of magnitude quicker for us.

Where this is not an option I can suggest the following (apologies if I'm stating the obivous, but hopefully, my suggestions will help/ give food for thought):

The screen scraper probably has a typing rate: increase this! - Simple but doubling the rate ~halves the time...
Multi-thread the server so it can deal with more than one client (assuming it isn't already).
Is it possible to call the ERP server though the same mechanism as the ERP client (e.g. are there service calls available?)
Is it possible to expose the methods on the ERP service as web services. I know some of the IBM Mainfames now allow you to install websphere, which can be utilised by a .net client and can expose functions on the server automagicallly
If you are not on a mainframe and you have a propriatary ERP systems, do they provide an API you can use to communicate with the server?

Antoine de Saint-Exupery: Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.

Bob Steel-Smith8-Feb-10 7:01

Re: Multiple Clients Running One Server Application

8-Feb-10 7:01

Hi, We try to avoid direct writes to the database due to upgrades of the software etc.

1. Even if the automation took 15 seconds this would be too long for the capture screren to wait.

2. Multi threading, I know nothing about so will have to research it.

3. Service Calls are available

4. Web Services may be used. I have created a web service but the scanning web page sends an xml string to the web services and then waits untill the web service is complete before refreshing the page ready for the next scan. If the Web page sent the xml string and then refresed the page straight away whilst the web serviced ran in the background tha would probably be the solution to my problem. Is it possible to do this?

5. The API's for the ERP System were developed by a third party that new how to develop but did not know the original software. They have a lot of bugs and are extremely difficult to correct.

Thanks, I have an idea of where I need to go with this.

Keith Barrow8-Feb-10 9:29

Re: Multiple Clients Running One Server Application

8-Feb-10 9:29

Bob Steel-Smith wrote:
4. Web Services may be used. I have created a web service but the scanning web page sends an xml string to the web services and then waits untill the web service is complete before refreshing the page ready for the next scan. If the Web page sent the xml string and then refresed the page straight away whilst the web serviced ran in the background tha would probably be the solution to my problem. Is it possible to do this?

Yes, this can be done asynchronously.

Bob Steel-Smith wrote:
5. The API's for the ERP System were developed by a third party that new how to develop but did not know the original software. They have a lot of bugs and are extremely difficult to correct.

Pity, this would really have sorted it out, 30s per transaction is far too much.

Antoine de Saint-Exupery: Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.

Bob Steel-Smith8-Feb-10 16:34

Re: Multiple Clients Running One Server Application

8-Feb-10 16:34

Right. I appreciate your assistance. I am self taught and write most of the code from examples so will do the same here. Thanks very much for your direction.

Keith Barrow8-Feb-10 23:40