Re: Exit For in C#? - .NET (Core and Framework) Discussion Boards

elp mehow to insert undeletable image in word document

Kumar Arun1-Feb-07 19:17

Kumar Arun

1-Feb-07 19:17

how to insert undeletable image in word document

Please h

Arun Kr

Re: elp mehow to insert undeletable image in word document

Pete O'Hanlon1-Feb-07 22:32

Pete O'Hanlon

1-Feb-07 22:32

OK. First of all, navigate to the top right hand corner of this web page. Do you see the text highlighted in red? That says .Net Framework and not Microsoft Office. You can probably guess where I'm going with this.

the last thing I want to see is some pasty-faced geek with skin so pale that it's almost translucent trying to bump parts with a partner - John Simmons / outlaw programmer

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

Question Regarding WSE 2.0 and 3.0

sharmankit1-Feb-07 12:40

sharmankit

1-Feb-07 12:40

Hello All,

I have a client app which is in .NET 1.0 and i have to work on a webservice, i was
wondering if i can write the webservice in 2.0. In this case, will the WSE 3.0 for the
webservice and WSE 2.0 for the client app in .NET 1.0 still work. Or it won't.

Help Me !!

Ankit Sharma

Table variables

Hendrik Debedts1-Feb-07 10:58

Hendrik Debedts

1-Feb-07 10:58

I'm writing a database class , I need to use a table variable from within .Net (C#), but it always gives an SQLException saying "Must declare the table variable '@Par1'."

1. I declared an SQLParameter object
2. I added the object to the 'Parameters' collection of the command

How can I solve this

Exit For in C#?

Hendrik Debedts1-Feb-07 6:38

Hendrik Debedts

1-Feb-07 6:38

What's the 'Exit For' equivalent in C#?

Re: Exit For in C#?

PIEBALDconsult1-Feb-07 6:41

PIEBALDconsult

1-Feb-07 6:41

break ?

Re: Exit For in C#?

Hendrik Debedts1-Feb-07 6:51

Hendrik Debedts

1-Feb-07 6:51

thx

Re: Exit For in C#?

Pete O'Hanlon1-Feb-07 9:07

Pete O'Hanlon

1-Feb-07 9:07

Most times when you use this it indicates that you have used the wrong construct. If you are issuing a break then this shows that you have reached a terminating condition.

If you need to drop out of a loop early, this would indicate that you should be using something like a while loop instead. See the following:

for (int i = 0; i < 10 ; i++)
{
  // Do something
  if (i == 2) break;
}

Contrast this with:

int i = 0;

while (i++ != 2)
{
 // Do something
}

Re: Exit For in C#?

led mike1-Feb-07 10:28

led mike

1-Feb-07 10:28

Pete O'Hanlon wrote:
If you need to drop out of a loop early, this would indicate that you should be using something like a while loop instead.

Or a different for expression

Node n = null;
NodeList list = doc.selectNodes("*");
for(int j=0, null == n && j < list.Length, j++)
{
  if( ???)
    n = list[j];
}

led mike

Re: Exit For in C#?

Alexandru Lungu2-Feb-07 6:09

Alexandru Lungu

2-Feb-07 6:09

Ya, Ya, we all know the theory; but break is more handier

Re: Exit For in C#?

Pete O'Hanlon2-Feb-07 8:32

Pete O'Hanlon

2-Feb-07 8:32

Handy doesn't make it right. Just lazy. If you take shortcuts here, where else do you take shortcuts? Whenever I see something like this, it sets the alarm bells ringing that there are problems with the design.

Re: Exit For in C#?

PIEBALDconsult2-Feb-07 8:34

PIEBALDconsult

2-Feb-07 8:34

And if it's due to an exceptional state, it may be more expressive. But certainly use it with caution.

Does anyone know how to deploy the MMC Snapin project ?

Glen Liu1-Feb-07 5:41

Glen Liu

1-Feb-07 5:41

Hi guys,

Does anyone know how to deploy the MMC Snapin project ? Confused | :confused:

Thanks,

Glen

Help using DataGrid

ricecake1-Feb-07 5:07

ricecake

1-Feb-07 5:07

In my application, I have a DataGrid that is used to display search results from a query into a Firebird SQL database. The DataGrid is not directly connected to the DB, but instead I perform my query and store the results in a std::vector, perform some more work on it, then copy the final results into an ArrayList that the DataGrid is connected to.

So, when I do a search, it goes like this:

C++

/* Obtain final std::vector with query results */

/* search_results_list is an ArrayList */
search_results_list->Clear();

// copy data into ArrayList
tr = db_conn->BeginTransaction();
typedef vector<int>::const_iterator CIter;
for (CIter it = run_ids.begin(); it != run_ids.end(); ++it) {
    /* look up Run ID in DB and store the run in disp */
    search_results_list->Add(disp);
}
tr->Commit();

/* reset DataSource to refresh the display */
datagrid_search_results->DataSource = 0;
datagrid_search_results->DataSource = search_results_list;

This works fine the first time, however I am having the following problem. If I click on a row, then subsequently perform another search that makes the row disappear, I get an IndexOutOfRange exception:

************** Exception Text **************
System.IndexOutOfRangeException: Index was outside the bounds of the array.
at System.Windows.Forms.DataGrid.Edit(String instantText)
at System.Windows.Forms.DataGrid.Edit()
at System.Windows.Forms.DataGrid.OnEnter(EventArgs e)
at System.Windows.Forms.Control.NotifyEnter()
at System.Windows.Forms.ContainerControl.UpdateFocusedControl()

However, my DataGrid has set the ReadOnly property to true. In my other DataGrid that is used for a different purpose, I was able to solve it by setting the CurrentSelectedRow property to 0 before removing the elements, but this does not work in this situation.

I am not sure if it is related to this, but the only event I am handling for this DataGrid is the MouseUp event, in order to get it to select the entire row when a cell is clicked:

// Select the entire row when the user clicks on a cell in the row
System::Void datagrid_MouseUp(System::Object* sender, System::Windows::Forms::MouseEventArgs* e)
{
    using System::Drawing::Point;
    using System::Windows::Forms::DataGrid;
    using System::Windows::Forms::DataGridCell;

    Point pt = Point(e->X, e->Y);
    DataGrid* datagrid = __try_cast<DataGrid*>(sender);
    DataGrid::HitTestInfo* hti = datagrid->HitTest(pt);
    if (hti->Type == DataGrid::HitTestType::Cell) {
        datagrid->CurrentCell = DataGridCell(hti->Row, hti->Column);
        datagrid->Select(hti->Row);
    }
}

--
Marcus Kwok

Re: Help using DataGrid

ricecake20-Feb-07 11:11

ricecake

20-Feb-07 11:11

ricecake wrote:

/* reset DataSource to refresh the display */
datagrid_search_results->DataSource = 0;
datagrid_search_results->DataSource = search_results_list;

So, the solution was to refresh the currency manager after resetting the data source by adding the following two lines:

CurrencyManager* cm = __try_cast<CurrencyManager*>(BindingContext->Item[search_results_list]);
cm->Refresh();

--
Marcus Kwok

iextenderprovider

nileshkolnoorkar1-Feb-07 1:53

nileshkolnoorkar

1-Feb-07 1:53

i want to add combobox editor to the extended property(using iextenderprovider) and want to populate the property in the coding intelliscence?
please help me.
thanks.

nilesh kolnoorkar.

.NET 2005 project build number

MayyMagdy1-Feb-07 1:33

MayyMagdy

1-Feb-07 1:33

Hi all,

i want to know how to get asp.net 2005 automatically change build number for the project "each time i build it", also i want to know why .net 2005 doesn't have a bin directory containing dll files and how can i manage this issue too.

Thank you

Re: .NET 2005 project build number

ed^nrgc12-Feb-07 5:06

ed^nrgc

12-Feb-07 5:06

Search the articles here on CP. There's one that I use.

CScrollView equivalent

hairy_hats1-Feb-07 0:08

hairy_hats

1-Feb-07 0:08

Hi All,

What's the equivalent of CScrollView in .NET? I'm looking for something to let me draw large vector diagrams in a scrollable, zoomable view, then print them either on multiple pages or scale-to-fit, and nothing seems to fit the bill.

Any suggestions gratefully received!

Implement Explicit Interface?

Captain See Sharp31-Jan-07 15:45

Captain See Sharp

31-Jan-07 15:45

Should I implement an IEnermable interface explicitly?

#region IEnumerable<Range> Members
/// <summary>
/// Enumerator (generic)
/// </summary>
IEnumerator<Range> IEnumerable<Range>.GetEnumerator()
{
  foreach (Range r in ranges)
    yield return r;
}

#endregion

#region IEnumerable Members
/// <summary>
/// Not used.
/// </summary>
System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
{
  throw new NotImplementedException("Non-generic enumerator");
}

They both cannot be implicit because C# does not allow overloading methods that only differ by return type. In what senerio should GetEnermerator be explicit rather than implicit? How do you usually implement yours? Also should I implement anything in the non-generic GetEnumerator method?

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Re: Implement Explicit Interface?

PIEBALDconsult1-Feb-07 7:40

PIEBALDconsult

1-Feb-07 7:40

I'm not sure I understand the question, but I would probably change that first method to

<br />
IEnumerator IEnumerable.GetEnumerator()      <br />
{<br />
    return ( ranges.GetEnumerator() ) ;<br />
}<br />

Re: Implement Explicit Interface?

Captain See Sharp1-Feb-07 8:26

Captain See Sharp

1-Feb-07 8:26

PIEBALDconsult wrote:
I'm not sure I understand the question

I am curious to whether I should implement the interface explicitly rather than implicitly. If I implement it explicitly I will not be able to call the GetEnumerator method unless I cast the instance of my class to IEnumerable(I think). Do you usually implement your IEnumerable interfaces explicitly, and do you implement any functionality in the non-generic GetEnumerator method?

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Re: Implement Explicit Interface?

Guffa1-Feb-07 9:09

Guffa

1-Feb-07 9:09

Why does your generic GetEnumerator method return a non-generic enumerator?

---
Year happy = new Year(2007);

Re: Implement Explicit Interface?

Captain See Sharp1-Feb-07 9:18

Captain See Sharp

1-Feb-07 9:18

Guffa wrote:
Why does your generic GetEnumerator method return a non-generic enumerator?

CP seen those as HTML tags and removed them, I should have checked "ignore html tags" when I posted it. It is generic in my project.

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Re: Implement Explicit Interface?

Guffa1-Feb-07 10:02

Guffa

1-Feb-07 10:02

Captain See Sharp wrote:
CP seen those as HTML tags and removed them, I should have checked "ignore html tags" when I posted it. It is generic in my project.

I see.

If you let Visual Studio create the stubs for implementing the interface, this is what you get:

public class test : IEnumerable<string> {

	#region IEnumerable<string> Members

	public IEnumerator<string> GetEnumerator() {
		throw new Exception("The method or operation is not implemented.");
	}

	#endregion

	#region IEnumerable Members

	IEnumerator IEnumerable.GetEnumerator() {
		throw new Exception("The method or operation is not implemented.");
	}

	#endregion
}

This makes the non-generic method explicitly implemented. I think that will work the best, as you should prefer the generic method unless you are using a reference to IEnumerable.

I would implement both of them, even if one is rarely used. There might be a situation where you would need the non-generic one.

---
single minded; short sighted; long gone;

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