Re: Call to Methods - C# Discussion Boards

Re: computer shop management with sql server connectivity project

Pete O'Hanlon3-May-07 0:54

3-May-07 0:54

Well congratulations. Do you mean that you want an asset inventory system? If so, you're probably going to have to end up paying for one.

Deja View - the feeling that you've seen this post before.

Re: computer shop management with sql server connectivity project

Paul Conrad3-May-07 4:13

Paul Conrad

3-May-07 4:13

Pete O'Hanlon wrote:
Do you mean that you want an asset inventory system?

Sounds like what he's looking for. He ought to just write one himself Big Grin | :-D

Re: computer shop management with sql server connectivity project

darkelv3-May-07 1:53

darkelv

3-May-07 1:53

Is it URGENTZ?

Sorry but we folks here will only give away our millions lines of code that we spent months and months of blood and sweat making the suite of software that you wants (free of charge) ONLY if it is "URGENTZ".

Call to Methods

Subrahmanyam K3-May-07 0:16

Subrahmanyam K

3-May-07 0:16

Hi Friends,

How can I handle the call to specific methods based on a string value without comapring the string value using any of the control statements .
The requirement is explained as follows:

I have 3 methods here.

1. CallMethod(String s)
2. ProcessAgencyDataTable()
3. ProcessAuthorityDataTable()

Now, I should be able to call the method ProcessAgencyDataTable() when (s="Agency") for CallMethod(String s) and
ProcessAuthorityDataTable() when (s="Authority") for CallMethod(String s).

I should achieve this without using any of the control statements (like if, if-else, switch etc).
The CallMethod() should be able to call the specific method based on the value of s parameter.
Note: There will be some similarity in the Method names that will be called.

        public void CallMethod(String s)<br />
        {<br />
            switch (s)<br />
            {<br />
                   case "Agency":<br />
	          ProcessAgencyDataTable();<br />
                       break;<br />
                   case "Authority":<br />
	         ProcessAuthorityDataTable();<br />
                       break;<br />
                   default:<br />
                       break;<br />
            }<br />
        }<br />
<br />
        private void ProcessAgencyDataTable()<br />
        {<br />
           // Implementation here<br />
        }<br />
<br />
        private void ProcessAuthorityDataTable()<br />
        {<br />
           // Implementation here<br />
        }

Thanks for some suggestions.

Subrahmanyam K

Re: Call to Methods

Brady Kelly3-May-07 0:31

Brady Kelly

3-May-07 0:31

You can build the method name dynamically and use Reflection to call the method.

using System.Reflection;
...
string methodName = String.Format("Process{0}DataTable", s);
Type t = this.GetType();
BindingFlags flags = BindingFlags.NonPublic | BindingFlags.InvokeMethod | BindingFlags.Instance;
t.InvokeMember(methodName, flags , null, this, null);
...

Re: Call to Methods

Subrahmanyam K3-May-07 0:46

Subrahmanyam K

3-May-07 0:46

Hi,

Thanks a ton for your wonderful suggestion.

Regards,

Subrahmanyam K

Re: Call to Methods

soneliso3-May-07 2:36

soneliso

3-May-07 2:36

This is cool i helped me too. Because i have about 10 methods to load on details on Form load
example
ReturnPersonalDetails
ReturnEducationalDetails
ReturnProfileDetails
ReturnWordDetails

Thanks again

Re: Call to Methods

J. Dunlap3-May-07 0:58

J. Dunlap

3-May-07 0:58

I don't know what this is for, but it could be that this could be better designed - for example, having separate classes or object instances for operations on each type of table. Then you could say:

agencyDataSource.ProcessTable();
authorityDataSource.ProcessTable();

In either case, you can have a dictionary to store the methods or objects by name:

//the object way
Dictionary<string, MyDataSourceObject> tableObjs = new Dictionary<string, MyDataSourceObject>();
...
tableObjs["Agency"]=agencyDataSource;
tableObjs["Authority"]=authorityDataSource;
...
tableObjs["Agency"].ProcessTable();
tableObjs["Authority"].ProcessTable();

//the method way
delegate void EmptyDelegate();
Dictionary<string, EmptyDelegate> methods = new Dictionary<string, EmptyDelegate>();
...
methods["Agency"]=ProcessAgencyDataTable;
methods["Authority"]=ProcessAuthorityDataTable;
...
methods["Agency"]();
methods["Authority"]();

Or you could do it using Reflection like Brady mentioned but it's slower as far as perf.

--Justin
Microsoft MVP, C#

C# / Web / VG.net / MyXaml expert currently looking for (telecommute) contract work![^]

Re: Call to Methods

Subrahmanyam K3-May-07 1:35

Subrahmanyam K

3-May-07 1:35

Thanks Justin,

When looking for the performance, your suggestion would serve better.
I will have to make a trade-off which way best suits for my Application.

Anyway, Thank you once again for your valuable suggestion.

Regards,

Subrahmanyam K

Re: Call to Methods

AFSEKI7-May-07 5:23

AFSEKI

7-May-07 5:23

Create:

1) Dictionary

printing a crystal report

rkherath2-May-07 23:29

rkherath

2-May-07 23:29

Hi,

I am trying to print a crytal report using my application programaticaly. I want the user to select the printer and number of copies etc from the print dialog box.

please tell me a way to do this i tried with the following method Where i am giving the Num of pages in the coding and the defualt printer prints the report.

But that is not how i want.

Here is my coding

RepStockSalesCatByLoc repstkslscat = new RepStockSalesCatByLoc();
repstkslscat.SetDataSource(dsreportDiv);
repstkslscat.PrintToPrinter(1, false, 1, 2);

Regards
Ruwandi

rkherath

Re: printing a crystal report

soneliso3-May-07 0:24

soneliso

3-May-07 0:24

Try using ReportViewier to print and use

ReportDocument rptDoc = new ReportDocument();
rptDoc.Load(Server.MapPath("ReportName.rpt"));
rptDoc.SetDataSource(yourDataSet);
CrystalReportViewer1.ReportSource = rptDoc;

the ReportViewer has a print button option, set it to true

CrystalReportViewer1.ShowPrintButton = true;

This usually selects all the printers added on that machine

i hope this helps

Re: printing a crystal report

rkherath3-May-07 0:38

rkherath

3-May-07 0:38

Hi,

Thax, but i have to print 112 reports at once using a foreach. This report is a stock and sales for 112 outlets of a supermarket. user wanna print all the reports at once. but he need to select the printer.
any idea!

regards
Ruwandi

rkherath

Re: printing a crystal report

darkelv3-May-07 1:56

darkelv

3-May-07 1:56

There is a property, PrinterName or some such, that you can set the printer name to.

Get Application directory from console program

Soundman32.22-May-07 23:23

Soundman32.2

2-May-07 23:23

I am writing a C# console program that needs to read a file from the same directory as the application. I can't use the current directory as that is not the same as the application directory.

Normally I would use Application.ExecutablePath, but console apps don't derive from Application.

Ideas?

Re: Get Application directory from console program

Soundman32.22-May-07 23:45

Soundman32.2

2-May-07 23:45

The current directory is NOT the application directory.

If I open a command prompt, change to C:\Windows and run the application C:\MyProg.exe your example will not work. The file 1.log is in C:\, but the current directory is C:\Windows so I will get a file not found exception.

Re: Get Application directory from console program

wurzel_cidermaker3-May-07 2:02

wurzel_cidermaker

3-May-07 2:02

try this.

static void Main(string[] args)
{

string loc = Assembly.GetCallingAssembly().Location;

string path = Path.GetDirectoryName(loc);

Console.WriteLine(path);

string[] bla = File.ReadAllLines(path + "\\1.log");

foreach (string var in bla)
{
Console.WriteLine(var);
}
}

Re: Get Application directory from console program

Brady Kelly3-May-07 0:01

Brady Kelly

3-May-07 0:01

System.Reflection.Assembly execAsm = System.Reflection.Assembly.GetExecutingAssembly();
string asmPath = execAsm.CodeBase.Replace("file:///", "").Replace('/', '\\');
MessageBox.Show(asmPath);

Re: Get Application directory from console program

Soundman32.23-May-07 0:51

Soundman32.2

3-May-07 0:51

I'd just got to that point, but I'm using :
System.Reflection.Assembly.GetExecutingAssembly().Location

Thanks.

Re: Get Application directory from console program

PIEBALDconsult3-May-07 6:28

PIEBALDconsult

3-May-07 6:28

Application.ExecutablePath works anyway, try it before you discard it.

"We learn more from our mistakes than we do from getting it right the first time."

Re: Get Application directory from console program

Stefan Prodan3-May-07 12:55

Stefan Prodan

3-May-07 12:55

That's easy, just use AppDomain.CurrentDomain.BaseDirectory to get the running directory and add to it your console application name and you have a path just like Application.ExecutablePath.

http://stefanprodan.wordpress.com

Re: Get Application directory from console program

AFSEKI7-May-07 5:25

AFSEKI

7-May-07 5:25

Application.ExecutablePath or Environment.CurrentDirectory for your need Wink | ;)

Hope this helps...

Changing the text of label

sujithkumarsl2-May-07 23:19

sujithkumarsl

2-May-07 23:19

hi i am trying to chage the text of a label,
but the thing is that its not fast
i am setting the text before some function calls but the text is changed after all the functions.
Do you know any effective method to quickly change the text of a label

My small attempt...

Re: Changing the text of label

Giorgi Dalakishvili2-May-07 23:28

Giorgi Dalakishvili

2-May-07 23:28

Can you post the code snippet? Also run the application in debug mode to see what happens

Re: Changing the text of label

sujithkumarsl2-May-07 23:42

sujithkumarsl

2-May-07 23:42

like
label1.Text = " method1";
method1();
label1.Text = "method2";
method2();
label1.Text = "method3";
method3();

this will disply method3 after all function call we will not get the other text
i maen no refreshing

My small attempt...

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.