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Hi,
Interop a=new Touch();
a.fingerDown();
will call Touch.fingerDown() although a is declared only as an Interop object.
BTW you should start public methods with an uppercase letter.
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thanks again for you help
rather have something you don't need, than need something you don't have
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Hello guys,
i am having a problem using Delegates,
now i am working on an application where i have a label on a form and then i have a separate class in separate CS file (ie., Form1.cs and myClass.cs)
what i am trying to do : i wanted to update label1.Text every tick of a timer with the format 00:00 next tick 00:01, then next tick 00:02 and so on
so in my Class there is a timer(System.Timers.Timer/System.Threading.Timer/System.Windows.Forms.Timer) and i am trying to update the label1 in form1 using the following :
Form1 :
-----------
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace WindowsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public void setlabeltext(Label lbl, String strValue)
{
lbl.Text = strValue;
}
private void Form1_Load(object sender, EventArgs e)
{
Class1 myClass = new Class1();
myClass.startCall();
}
}
}
myClass:
--------------
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Timers = System.Windows.Forms.Timer;
namespace WindowsApplication2
{
class Class1
{
Form1 form1 = new Form1();
Timers timoz = new Timers();
public void timoz_Tick(object sender, EventArgs e)
{
ThreadSafeSetLable(form1.label1, DateTime.Now.Subtract(DateTime.Now).ToString());
}
private void ThreadSafeSetLable(Label lbl, string value)
{
if (form1.InvokeRequired)
{
form1.Invoke(new SetString(form1.setlabeltext), new object[] { lbl, value });
}
else
{
form1.setlabeltext(lbl, value);
}
}
private delegate void SetString(Label txtBox, string strValue);
public void startCall()
{
timoz.Interval = 1000;
timoz.Start();
timoz.Tick += new EventHandler(timoz_Tick);
}
}
}
this is not working i dont know why , it compiles no problem , in the debugging the label1.text is changing to 00:00:00 but runtime i dont see that , plus the form1.InvokeRequired never gets to "true" , i do realize that i am missing something but i dont know what , can i have help on that ? thanx
T.R.
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Tamer A.Rahman wrote: Form1 form1 = new Form1();
I'm not sure what you hope this to do, but it will create a new instance of Form1, which is in no way related to the one that is visible on your screen.
Your controls should also not be made public on the class, delegates are used to avoid such nastiness. A delegate defined in class1, should call a method in form1, and pass in the string to set. The method should assign the string to the label, and class1 calls the delegate whenever it likes, via your timer or whatever.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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well, thank you for the reply,
i got it already
it was the wrong approach from the begining and i fixed it
thanks for all the help anyway
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I am using VS2005 with SQLServer Express Edition. Select SQL statement work fine but not Insert or update. Is there something am doing wrong?
Sample insert code.
DataSet.DatabaseDataSetTableAdapters.SaleTransactionTableTableAdapter SaleTransAdapter = new DataSet.DatabaseDataSetTableAdapters.SaleTransactionTableTableAdapter();
SaleTransAdapter.Insert(7, (decimal)NetTotal, DateTime.Now);
Nana
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i add the same problem with i think.
the problem is when you create the DB, it make a copy of it in your bin/debug forder and every update are in this DB
the one you create is the basic one and every time you run the debugger, he takes all the info in the basic one to overwrite the bin/debug one but the screen result show you the bin/debug DB.
so, it look like the add you made are not working
in your db explorer, create a new connection and link it to the bin/debug one then when you add something, check in this one
hope it help you !
have a good one 
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Thank you for your help. I am afraid to say its still not working. Only select statements work after i have manually populated the database. Insert and updates still don't. i added a connection to the copy in the debug. It also has the same data as the one in the local folder. Insert still not working on that one too. I will appreciate anymore suggestions
Nana
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Well thanks for your suggestion. I tried it and its still not working. Insert and update statement do not work on the database cope in the debug directory too. The select statement works if i populate the database manually. I create insert and update commands to no success. I will appreciate anymore sugestions. Thanks
Nana
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You need to set insert and update commands
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Well thanks for your suggestion. I tried it and its still not working. Insert and update statement do not work on the database cope in the debug directory too. The select statement works if i populate the database manually. I create insert and update commands to no success. I will appreciate anymore sugestions. Thanks
Nana
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Hi
I'm currently developing a windows application in c#. I have a set of static libraries written in c++ which I used in a VC++ application. The libraries have numerous classes which would be useful. So I'd like to instantiate object of these classes in my c# code. The question is should I discard the libraries and re-write the code or can I make this into managed code or can I leave it and use it as is.
Any suggestions would be great!
Cheers
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From managed code in C# you can only use PInvoke to call 'C' functions exported from DLLs. If you have exported C++ classes you cannot interact with them at all using PInvoke.
Using VC++/CLI in a mixed mode project you can access both the managed world and the native world. If you use C++/CLI to wrap the old classes in managed classes you will be able to reuse the code as is and expose it to C# code through the new managed class or classes. There are many articles here and on MSDN about C++/CLI and there is a forum for it on CodeProject as well.
led mike
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hi
i need a Vs2005 richTextBox component that has background image capability.
thanks
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I create stord procedure in SQL 2000
Select_Cost
@day1 int,
@month1 int,
@year1 int,
@day2 int,
@month2 int,
@year2 int
AS
Select aa,ab,autoclave,fz,ez,liquidglue,pearlglue,hh,pva
from CostDetails
where
datepart(day, costdate ) >= @day1
and
datepart(month, costdate ) >= @month1
and
datepart(year, costdate ) >= @year1
and
datepart(day, costdate ) >= @day2
and
datepart(month, costdate ) >= @month2
and
datepart(year, costdate ) >= @year2
GO
and i want shoe result in Crystal report
i try it in C#.net 2005 and write this code but crystal report load empty :
private void button1_Click(object sender, EventArgs e)
{
SqlConnection con =new SqlConnection();
con.ConnectionString = "Data Source=.;Initial Catalog=cost;Integrated Security=True";
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = "Select_Cost";
SqlParameter par1 = new SqlParameter("@day1", dateTimePicker1.Value.Day);
SqlParameter par2 = new SqlParameter("@month1", dateTimePicker1.Value.Month);
SqlParameter par3 = new SqlParameter("@year1", dateTimePicker1.Value.Year);
SqlParameter par4 = new SqlParameter("@day2", dateTimePicker2.Value.Day);
SqlParameter par5 = new SqlParameter("@month2", dateTimePicker2.Value.Month);
SqlParameter par6 = new SqlParameter("@year2", dateTimePicker2.Value.Year);
cmd.Parameters.Add(par1);
cmd.Parameters.Add(par2);
cmd.Parameters.Add(par3);
cmd.Parameters.Add(par4);
cmd.Parameters.Add(par5);
cmd.Parameters.Add(par6);
SqlDataAdapter datadp = new SqlDataAdapter();
datadp.SelectCommand=cmd;
ChamberDataSet ds = new ChamberDataSet();
con.Open();
datadp.Fill(ds);
con.Close();
crystalReportViewer1.Visible = true;
CrystalReport1 report1 = new CrystalReport1();
report1.SetDataSource(ds);
this.crystalReportViewer1.ReportSource = report1;
THANK U
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Afternoon All,
This has maybe been asked a million times so apologies in advance.
Does anyone have a tried and tested way of converting a decimal to a fraction (including negative decimals) or better still can you point me in the direction of an article explaining how to do this? I have tried google but can find nothing on C#. I did convert a program written in VB, but only to find that the logic therein was wrong.
Really appreciate any help
Thanks in advance
Colin
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Just search cp for fraction class 
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Thats excellent. Just what I was looking for. I had come across another one in CP but not this one.
Many thanks
Colin
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There are a few, mine and others (which were of assistance to me). Which did you find easiest or most helpful?
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Hi
I went with the one supplied by Giorgi and although I am making headway. it is a bot complicated for one of limited experience. Do you have something else?
Many tahnks
Colin
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I'm creating WinForms ERP application.
This application need to run custom scripts in may places like:
retrieving list of invoices
before adding invoice
before saving invoice
after saving invoice
before posting invoice
after posing etc.
etc.
I'm looking for script engine which simplifies this.
Features I need to embed into application are:
1. Syntax coloring script editor
2. Syntax check on script save
3. Executing scripts with error reporting
4. Passsing parameters to/from scripts
5. Allowing scripts to access application objects.
6. Maybe binding scripts to Winforms control events.
Any framework, idea, or sample code how to implement this ?
Andrus
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You can use the Microsoft Scripting engines. I don't know if any licensing is involved.
led mike
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I'm implementing entity object which should populate its properties from
database when property is first referenced.
In RDL reports I use object properties like
MyObject.MyProperty
MyObject is instance of entity class. There is no MyProperty property in MyObject at design time.
I need to catch missing object reference and provide object value at run time. Something line
public class MyEntity {
override Exception Exception.MissingPropertyGetException {
return dbo.ExecuteScalar("SELECT "+Exception.UnreferencedPropertyName+
" FROM myEntity");
}
}
Any idea how to implement this ?
Andrus
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I don't know if properties can be added at run time.
What I would do is have a dictionary (e.g. System.Collections.Generic.Dictionary<string,object>) for various values the object may hold.
You can then have a property that exposes the dictionary and access the values like
myobj.Properties [ "SomeProperty" ]
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