C# Discussion Boards - CodeProject

J.a.c.k24-Aug-04 1:04

J.a.c.k

24-Aug-04 1:04

Hi Jay,

My English is not very well but I'll try to explain:

Code works fine and it solved problem, but when I click somewhere in grid program selects text in that cell like before I entered your code and then it selects complete row (all selection colors are set). So selection doesn't look nice, I was wondering can this be avoided?

Thanks for your time.

Regards,

J.a.c.k

Re: DataGrid selection

Jay Shankar25-Aug-04 1:07

Jay Shankar

25-Aug-04 1:07

Hi Jack,
I got your problem.
This can be solved by p/invoking LockWindowUpdate.
In MouseDown you lock the window update and in MouseUp you need to unlock it.
Please revert back whether you could do as mentioned above.
Otherwise I will send you the code showing How to do it?

Regards,

Jay.

Re: DataGrid selection

J.a.c.k26-Aug-04 5:48

J.a.c.k

26-Aug-04 5:48

Thanks Jay it works, just one more question:

How can I select first row of DataGrid in form_load event, if I could simulate click on first row then my mouse_up and mouse_down events would apply on that row. Is there an easy way of doing this?

Regards,

J.a.c.k

Re: DataGrid selection

Jay Shankar26-Aug-04 17:49

Jay Shankar

26-Aug-04 17:49

Simply call myDataGrid.Select(0), as below:

if(myDataGrid.VisibleRowCount > 0)
{
	myDataGrid.Select(0);
}

Saving Time from a DataGrid

CarpyDog21-Aug-04 5:11

CarpyDog

21-Aug-04 5:11

I can save a date but not a time like 11:01 any ideas, the grid is bound to a wizard generated dataset

Thanks for any help

jnc

Re: Saving Time from a DataGrid

J.a.c.k21-Aug-04 22:15

J.a.c.k

21-Aug-04 22:15

How do you mean you can't save time? Explain!
Confused | :confused:

Re: Saving Time from a DataGrid

Anonymous22-Aug-04 0:26

Anonymous

22-Aug-04 0:26

Many thanks for your reply
I have a test app with a bound grid a number of columns two are Time

I have a seperate routine which defines the columns of the grid
for the relevant column
DataGridTableStyle ItemList= new DataGridTableStyle();
ItemList.MappingName="TblEventitems";

DataGridTextBoxColumn Col3=new DataGridTextBoxColumn ();
Col3.Headertext="Start";
Col3.MappingName="EIStart";
Col3.Format="HH:mm";
Col3.NullText="00:00";
Col3.Width=50;
Col3.Alignment=HorizontalAlignment.Center;

ItemList.GridColumnStyles.Add(Col3);
DataGrid1.TableStyles.Add(ItemList);

other columns save OK even for the same record but the time remains 00:00 I have tried removing the NullText format

The Date saves OK (which I don't need) but the time is 00:00 If I change the time directly in the table it displays Ok in the grid but then I get a Concurrency Violation if I try to update

Re: Saving Time from a DataGrid

sreejith ss nair22-Aug-04 3:48

sreejith ss nair

22-Aug-04 3:48

hi,

You can show time on your datagrid. For more details view this site
datagrid in codeproject

**************************
S r e e j i t h N a i r
**************************

RichTextBox - SaveFile problem

QzRz21-Aug-04 1:20

QzRz

21-Aug-04 1:20

Hi...

I have made a RichTextBox and wants to save the text...!
but it keep throws an error..!
My code is like this...

RichTextBox TextTest = new RichTextBox();
TextTest.Multiline = true;
TextTest.Text = "Test on savint" + "\n";
TextTest.Text += "here is something" + "\n";
TextTest.Text += "And some more" + "\n";

Stream TextSave;
SaveFileDialog spil = new SaveFileDialog();
spil.Filter = "TXT fil|*.txt|Alle filer|*.*";
spil.Title = "Gem fil som tekstfil";
spil.InitialDirectory = Directory.GetCurrentDirectory();
if(spil.ShowDialog() == DialogResult.OK)
{
if((TextSave= spil.OpenFile()) != null)
{
TextTest.SaveFile(TextSave, RichTextBoxStreamType.PlainText);
TextSave.Close();
}
}

But it trows an errer -> System.NullReferenceException: Object no set to an instance of an object!

Can anyone help me what to do?

QzRz

Re: RichTextBox - SaveFile problem

leppie21-Aug-04 4:48

leppie

21-Aug-04 4:48

QzRz wrote:
But it trows an errer -> System.NullReferenceException: Object no set to an instance of an object!

At what line>?

^{top secret xacc-ide 0.0.1}

Re: RichTextBox - SaveFile problem

QzRz22-Aug-04 8:25

QzRz

22-Aug-04 8:25

Hi.. sorry i didnt write...

The error is thrown here -> TextTest.SaveFile(TextSave, RichTextBoxStreamType.PlainText);

QzRz

Re: RichTextBox - SaveFile problem

David Salter22-Aug-04 11:59

David Salter

22-Aug-04 11:59

You haven't initialized TextSave

store your internet favourites online - www.my-faves.co.uk

Re: RichTextBox - SaveFile problem

QzRz23-Aug-04 4:07

QzRz

23-Aug-04 4:07

Doh...! I forgot that...!

Thanks alot..!

QzRz

Re: RichTextBox - SaveFile problem

mav.northwind21-Aug-04 7:46

mav.northwind

21-Aug-04 7:46

You could ged rid of the Stream TextSave and use

if(spil.ShowDialog() == DialogResult.OK)
{
  TextTest.SaveFile(spil.Filename, RichTextBoxStreamType.PlainText);
}

instead.

filling untyped datasets

Anonymous20-Aug-04 21:42

Anonymous

20-Aug-04 21:42

Hi I have a untyped dataset and also a typed dataset on my design surface. To add new tables to my untyped dataset I can go thru' Tables collection in properties window. But it's a tedious job. Can I somehow copy the structure of table from Typed Dataset(which have been generated using DataAdapter) into Untyped one?

Re: filling untyped datasets

Alex Korchemniy21-Aug-04 9:03

Alex Korchemniy

21-Aug-04 9:03

Can you explain yourself. What are you trying to do this for?

Date Translation

oOomen20-Aug-04 21:27

oOomen

20-Aug-04 21:27

hi,
can any one tell me how to translate gregorian date to hebrew date?
thanks in advance

Re: Date Translation

oOomen20-Aug-04 22:27

oOomen

20-Aug-04 22:27

ok i got it
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemglobalizationhebrewcalendarclassgetyeartopic.asp

C# IPHostEntry Cache???

gman4420-Aug-04 17:43

gman44

20-Aug-04 17:43

Here is one of the coolest few lines of code to perform a NSLookUp. Simply enter an IP in textBox1, click a button and the domain name translates in textBox2 (providing your workstation is on a WAN.

Q. How could we build a 'cache' to capture redundant IP's/Domain's to add lookup performance???

Q. How could we add our own know IP's/Domain's to this 'cache' ??? (Because NOT every IP will resolve)

Preferably the code would check our personal 'cache' first before looking on the Internet or elsewhere.....

public void ButtonLookupDomain_Click(object sender, EventArgs ea)
{
IPHostEntry IP = Dns.Resolve(textBox1.Text);
txtBox2.Text = IP.HostName;
}

Re: C# IPHostEntry Cache???

leppie21-Aug-04 5:02

leppie

21-Aug-04 5:02

if (somehashtable.Contains(textBox1.Text))
{
  txtBox2.Text = (somehashtable[textBox1.Text] as IPHostEntry).HostName;
}
else
{
  IPHostEntry IP = Dns.Resolve(textBox1.Text);
  txtBox2.Text = IP.HostName;
  somehashtable[textBox1.Text] = IP;
}

^{top secret xacc-ide 0.0.1}

Re: C# IPHostEntry Cache???

gman4422-Aug-04 11:25

gman44

22-Aug-04 11:25

Excellent, clean and simple coding. I like it so far... The more I study windows DNS, I realize my goal is to create my own 'hosts' file. I can write to it and IPHostEntry can read from it instead of the 'hashtable' you've so kindly shared.

Q. How can I create my own 'hosts' file in place of the 'hashtable' example???

Thank You.....

Re: C# IPHostEntry Cache???

leppie22-Aug-04 11:33

leppie

22-Aug-04 11:33

kvnsdr wrote:
The more I study windows DNS, I realize my goal is to create my own 'hosts' file.

DNS was made to remove the need for HOSTS file. Heck you can even just edit the windows one then (i do for my little local network) in $windir\system32\drivers\etc\hosts

^{top secret xacc-ide 0.0.1}

which xml class to use to parse?

vista2720-Aug-04 14:22

vista27

20-Aug-04 14:22

can someone suggest which xml class i should use to easily find a certain, possibly nested, element tag and read its value? i've been playing with the xmltextreader class but it's not immediately obvious how to do it with this class. i'm not well versed in XML vocab, so this might be a problem. thanks for any help.

Re: which xml class to use to parse?

Steven Campbell20-Aug-04 14:59

Steven Campbell

20-Aug-04 14:59

You should look into xpath expressions - they are a spacialized xml querying language, precisely for what you are trying to do.

my blog

Re: which xml class to use to parse?

Heath Stewart20-Aug-04 15:12

Heath Stewart

20-Aug-04 15:12

A shorter answer would be to the question, "What XML classes can't I use to parse and read values from XML files?"

Take a look at the System.Xml namespace in the .NET Framework SDK at http://msdn.microsoft.com/library/en-us/cpref/html/frlrfSystemXml.asp[^]. It's also installed locally by default when you install the .NET Framework SDK or Visual Studio .NET (any version), which also installs the .NET Framework SDK. There's plenty of articles that describe this on MSDN Online[^] (it seems that not a week goes by without another XML article), and there is a great section on working with XML in the .NET Framework SDK. Read Employing XML in the .NET Framework[^].

Notice how much I mentioned the .NET Framework SDK? It really should be your first place to look and you should definitely read over the programming topics to gain a better understanding of what's available in the .NET Framework base class libraries, as well as the CLR and other .NET technologies themselves.

Software Design Engineer
Developer Division Sustained Engineering, Microsoft
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