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Hi Save-Tigers,
I managed to get it to work, thanks to the support of Matlab
although they mentioned several times I should buy the .net compiler
from them..
This is (part of my) code:
1) initialize matlab environment:
[DllImport("mclmcrrt710.dll", EntryPoint = "mclInitializeApplication_proxy")]
static extern bool InitiateMatlabApplication(string options, Int32 count);
call it from your code:
bool result = InitiateMatlabApplication(null, 0);
2) initialize your matlab code:
[DllImport("MatlabModel.dll", EntryPoint = "MatlabModelInitialize")]
static extern bool InitiateMatlabModel();
Note that MatlabModel must be replaced by whatever you named it
call it from your code:
bool result = InitiateMatlabModel();
3) Passing string arguments to Matlab:
[DllImport("MatlabModel.dll", EntryPoint = "mlfInitializeProject")]
static extern bool InitializeProject(IntPtr RootDir,
IntPtr Name);
Where RootDir and Name are strings. Use mxcreate_string_proxy from Matlab
to convert to matlab-format:
[DllImport("mclmcrrt710.dll", EntryPoint = "mxCreateString_proxy", CharSet = CharSet.Ansi)]
static extern IntPtr CreateString([In][MarshalAs(UnmanagedType.LPStr)] string myString);
Use this in your code:
IntPtr ptrLocation = CreateString(strProjectLocation);
IntPtr ptrName = CreateString(Settings.ProjectName);
Now, use the pointers above to pass strings to matlab:
result = InitializeProject(ptrLocation, ptrName);
4) Retrieving double argument from Matlab:
I've created a function which returns a double, nothing more:
[DllImport("MatlabModel.dll", EntryPoint = "mlfGetNofSteps")]
To use it in your code:
IntPtr result_ptr = IntPtr.Zero;
bool result = GetNofSteps(1, ref result_ptr)
To convert the pointer to an integer:
[DllImport("mclmcrrt710.dll", EntryPoint = "mxGetScalar_proxy")]
static extern double GetScalar(IntPtr mxArray);
So, to convert the pointer to value:
int NumberOfSteps = Convert.ToInt32(GetScalar(result_ptr));
5) Retrieving from and sending arguments to Matlab:
I've created a function which returns some matrices and uses a double as variable:
[DllImport("MatlabModel.dll", EntryPoint = "mlfmyFunction")]
static extern bool myFunction(int nargout,
ref IntPtr ptrResultMatrix1,
ref IntPtr ptrResultMatrix2,
ref IntPtr ptrResultMatrix3,
IntPtr ptrSTep);
First, to create pointers to matrices Matlab can use as output parameters, use this:
[DllImport("mclmcrrt710.dll", EntryPoint = "mxCreateDoubleMatrix_700_proxy")]
static extern IntPtr CreateDoubleMatrix(int cols, int rows, int flags);
Use the above function to declare pointers to matrices in which Matlab will return the values:
IntPtr ptrResultMatrix1 = CreateDoubleMatrix(10, 1, 0);
IntPtr ptrResultMatrix2 = CreateDoubleMatrix(10, 1, 0);
IntPtr ptrResultMatrix3 = CreateDoubleMatrix(10, 1, 0);
Next, create matrix to use as input parameter:
double[] value = new double[1];
value[0] = Convert.ToDouble(DayStep);
IntPtr ptrStapDag = CreateDoubleMatrix(1, 1, 0);
IntPtr value_ptr = GetPtr(ptrStep);
Marshal.Copy(value, 0, value_ptr, 1);
Now the pointers are set, call the created function:
bool result = myFunction(3, ref ptrResultMatrix1, ref ptrResultMatrix2,
ref ptrResultMatrix3, ptrStep);
Notice the 'ref' for output parameters!
I hope the above sample code helps you out.
Maybe I should write an article on codeproject, explaining it in detail.
-- Stupidity should be painfull --
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Hey thanks JAN,
That was realy realy a very good help......
thanks thanks a lot for this
Reg,
Deep
Happy coding
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hi
can you help explaning how you create the dll,
using mcc?
what is the line you write when you compile m file?
i am asking this because i wrote:
mcc -W cpplib:TestFunction -T link:lib TestFunction.m
and in the export finctions i got mlxTestFunction instead of "mlfTestFunction"
thanks
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Hi Nizar,
I didn't create the dll using the command line,
instead I used deploytool.
I selected the Microsoft compiler, which creates
both mlx as well as mlf functions.
-- Stupidity should be painfull --
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hi
can you help explaning how you create the dll,
using mcc?
what is the line you write when you compile m file?
i am asking this because i wrote:
mcc -W cpplib:TestFunction -T link:lib TestFunction.m
and in the export finctions i got mlxTestFunction instead of "mlfTestFunction"
thanks
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hi
i try the same way you discriped here but when it get to call myFunction if failed.
any idea?
bool result1 = InitiateMatlabApplication(null, 0); // pass ok
bool result2 = TestFunctionInitialize(); // Pass ok
bool result3 = mlxTestFunction(); // failed
bool result4 = TestFunctionTerminate();
thanks
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I didn't use the mlx function, instead I used the mlf functions.
The InitiateMatlabApplication, TestFunctionInitialize and TestFunctionTerminate
are default created by Matlab, soo it is likely they will pass.
-- Stupidity should be painfull --
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I use the test runner of Visual Studio 2008, and I'm trying to get 100% code coverage with my unit tests in which I have almost succeeded.  However the last couple percent are a bitch. 
I have some code in a base class that throws an error if some conditions are not met. This code is marked as only partially tested (beige). I know for a fact that this code is exercised several times during the tests. However there are some descendant classes that cannot cause condition that will lead to the execution of this particular section of code. Is this the reason I get the incomplete coverage result, and how do I cope with it?
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K.v.S. wrote: Is this the reason I get the incomplete coverage result, and how do I cope with it?
That is plausible.
You could add tests for the base class itself.
Or you could add another derived class that does need the specific base class code, and test it.
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
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Hello i need to set a query string to null or empty after it had a value can any body assist me??
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Try to explain that again please.
If you want to set a string to null, which probably is not want you want, you can do...
string s = "something";
s = null;
Life goes very fast. Tomorrow, today is already yesterday.
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I have a query string that is used in a page.
i sent this url from pop up page lets say
window.opener.location.href = window.opener.location.href +" 'Id=1'";
but after i get the Id
request.queryString["Id"]
i want it to be string.empty or null i simply want to remove it or assign to it a value so i will not check it again.
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Well that makes more sense, but I cannot help you I'm afraid, try posting in the Web Development forum instead next time.
Life goes very fast. Tomorrow, today is already yesterday.
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QueryString collection is readonly, it can not be modified.
Coding C#
www.excitetemplate.com
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Hi guys,
I need some help please. I have a parent form (mdi) where a context menu item click opens up a child form, that child form takes a long time to load and so I wish to somehow allow the user to be able to click on a different context menu item click while child form A is being loaded.
Please advice of a way of doing this.
Thank you in advance.
Sameer
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Your initial thought of thread is correct. However, you have to do all GUI stuff on the GUI thread, including the showing of the form. What you could do instead of this is move the code which is invoked when you show child form A onto a different thread. Just make sure that you use the Invoke method of child form A if you need to actually fiddle around with the controls.
Between the idea
And the reality
Between the motion
And the act
Falls the Shadow
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Thank you for your prompt response. Is there any way you could give me an example. I tried using a background worker but that doesn't work because of MTA restrictions. I was getting a dragdrop.... error. I tried initiating a regular thread and that is not working either because of what you suggested "GUI stuff on the GUI thread" All I am doing is GUI stuff, here is the code in my button click on mdi to open child form A
try
{
this.Cursor = AdvancedCursors.Create(Path.Combine(Application.StartupPath, "wagtail.ani"));
if (frm2 != null)
{
frm2.Close();
}
frm2 = new frmGrid2(m_ADBCnn, TechnicianstoolStripMenuItem1.Text, frm1);
frm2.CellClicked += new CellClickedEventHandler(frm2_CellClicked);
if (frm1 != null)
{
this.frm1.CellClicked += new CellClickedEventHandler(this.frm2.frm1_CellClicked);
this.frm2.CellClicked += new CellClickedEventHandler(this.frm1.frm2_CellClicked);
}
frm2.Show();
frm2.MdiParent = this;
this.VerticalTiletoolStripMenuItem1.PerformClick();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
Sameer
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There are three things which could cause the delay:
this.Cursor = AdvancedCursors.Create(Path.Combine(Application.StartupPath, "wagtail.ani"));
frm2 = new frmGrid2(m_ADBCnn, TechnicianstoolStripMenuItem1.Text, frm1);
this.VerticalTiletoolStripMenuItem1.PerformClick();
Which of those lines causes the delay? You can find this out by stepping through the code and seeing which line seems to take longer to execute.
When you know which line takes the longest time to execute, put it into a separate thread.
Between the idea
And the reality
Between the motion
And the act
Falls the Shadow
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It's definately frm2 = new frmGrid2(m_ADBCnn, TechnicianstoolStripMenuItem1.Text, frm1); and frm2.show(). The part that takes long is the loading of the child form because it pulls quite a bit of data so it opens it but then the grid in child form is blank until all data is pulled.
Sameer
Sameer
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What you need to do is get the data in a separate thread. In the GUI thread, set the grid's data source to your table. Then start the separate thread which adds the data to the data source. The grid should get updated automatically.
Between the idea
And the reality
Between the motion
And the act
Falls the Shadow
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Pardon my ignorance as I am not the best in using threads. Currently on load of child form I am calling the runworkerasync method of the background worker with retrieves data and upon completion assigns dataset to grid and formats the grid.
Here is the change I have made and I am getting an error of cross thread operation.
worker1
Async in form load
do work retrieves data from database
Completed calls Worker2Async
Worker2
Async in Completed of Worker1
Do work assigns datagridview datasource to dataset containing data retrieve by worker1
Completed formats the grid
I am getting an error in Do work for Worker 2, when I call datagridview.datasource=dataset, it says cross thread operation... datagridview accessed from a different thread then the one it was created in... Any suggestions, am I doing what you suggested?
Please help
Sameer
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You only need one worker that gets the data from the database.
The form should kick off the background worker, then format it's datagrid as appropriate on the UI thread. ANY interaction with a control MUST be done on the UI thread, not from a background worker.
When the data fetching background work finishes it's job, just the the grid's DataSource property to the data returned.
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Thank you Dave for the guidance. I have switched my code back to your suggestion for the most part. I now have a background worker that does the following:
On form load I am calling the runworkerasync
dowork: retrieves all the data to database and assigns it to a datatable
Completed: Assigns datatable to datagridview datasource
Now I need to run a format grid function that goes through the grid and formats some cells. Where do I call that, should I call that in the completed of the worker?
Please advice
Sameer
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Hi,
the basic idea is:
- long computations (including waiting on a database or a network...) belong in a separate thread, which could be a BackgroundWorker or a ThreadPool thread or a real Thread instance.
- manipulations of Controls (including Forms and DataGrids) need to run on the main thread
You can organize that with BackgroundWorkers, as they have two events (Progress and Completed) that always will run on the main thread; or you can get similar results with Control.Invoke
I have a little article[^] that explains more.
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
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Private StringBuilder sb=null
private void CutCopyPaste(bool Cut, bool Copy, bool Paste)
{
foreach (Form f in this.MdiChildren)
{
if (f.ContainsFocus)
{
foreach (Control c in f.Controls)
{
if (c.Focused)
{
if (c.GetType() != typeof(Label))
{
if (Cut)
{
sb.Append(c.Text);
c.Text = "";
}
else if (Copy)
sb.Append(c.Text);
else if (Paste)
c.Text = sb.ToString();
break;
}
}
}
}
}
}
private void copyToolStripMenuItem_Click(object sender, EventArgs e)
{
try
{
sb = null;
sb = new StringBuilder();
CutCopyPaste(false, true, false);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void pasteToolStripMenuItem_Click(object sender, EventArgs e)
{
try
{
if (sb != null)
CutCopyPaste(false, false, true);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void cutToolStripMenuItem_Click(object sender, EventArgs e)
{
try
{
sb = null;
sb = new StringBuilder();
CutCopyPaste(true, false, false);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
It is the complete code for cut copy and paste but if we take textbox inside the container like groupbox,panel etc. its not working ...and i want also include the feature Undo and SelectAll...how can i do this...
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