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I have some problems using the datagrid in C#:
1.How can I set the font of each column separately? I mean if I change the font of the datagrid,the font of all columns changes,I couldn't find anything in table styles and so on.
2.I fill my datagrid from database. I want to have a column showing the row number.I didn't use the ability C# made(Autoincrement), 'cause whenever the datagrid is filled,it isn't being reset even if I set the autoincrementseed to '1' in my code.So I made it myself by a simple loop in the code.How can I use C# to do this?
3.By using the row number,I click on the header to sort the data in that column and the whole row position changes in the datagrid regarding des or asc sort.But I want to refresh the row number again. I mean if you have 3 rows:
1.Mozhdeh,2.Ali,3.Mina
and you click to sort them it becomes:
2.Ali,3.Mina,1.Mozhdeh
But I want it to become:
1.Ali,2.Mina,3.Mozhdeh
Thanks in advance.
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according to ur reqirement i think
u should use listview control
becouse it has facility to color individual column
and has got coulmnclick event on which u can fill
listview through coding.
rahul
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I don't have the experience to work with the listview control.Does it have the same facilities as the datagrid?Does it have the same nice user interface? I mean the rows and the columns in the listview doesn't have the same nice user interface,does it?Would you please introduce it a little bit more?
Thanks.
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u r right that listview do not have that nice interface as datagrid
but again the functionality u r looking for is possible with listview
listview donot have any property like datasource so u can not bind it with dataset.
u have to individualy add the data using listview item object.
ur reqired to do lot of coding in using listview,so i will sugest u
to learn more about the use of listview.
rahul
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Thanks a lot.But I want to fill it from database. I think because it doesn't have any property to bind a dataset to it, it isn't possible,is it?So isn't there a way to move a cell in a datagrid individually in order to solve the sort problem I mentioned?
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yah u can fill listview from dataset by following way
suppose u have three columns then
foreach(DataRow Dr in dataset.tables["table name"].rows)
{
ListViewItem iTem=new ListViewItem();
iTem.SubItems.Add(Dr["column name"].ToString());
iTem.SubItems.Add(Dr["column name"].ToString());
iTem.SubItems.Add(Dr["column name"].ToString());
listview1.items.add(item);
}
rahul
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The answer for everything are DataGridColumnStyles.
I do not have the time to give some detailed examples but generally you can tell the grid how each column should look like by explicitely defining DataGridColumnStyles. There are predefined ones which get automatically created when you bind the DataSource but you can override them. You can implement as much different styles as you want (inheriting either from the DataGridColumnStyle base class or probably from DataGridTextBoxColumn or another default one. The most important part there is now that you can implement your own Paint function where you can change color, font, the contents or whatever you like.
I suggest reading on this topic on MSDN, search for articles here on CP and probably use Reflector to look at the built in ones to get an idea on how to start. The whole thing can be rather complex at the beginning but if you know how to use it you can really do neat stuff with the DataGrid.
-- modified at 6:57 Wednesday 14th June, 2006
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Has anyone used the LabelEdit "feature" of the NET 2.0 TreeView class.
If so, is there an easy way of processing the keystrokes of the "new label value" as they're entered. The KeyDown etc events for the TreeView itself are not invoked as they are entered. My planning assumption was I'd implement my own text input control when the user hit F2 or selected Change Name from the context menu. However the LabelEdit feature has come pdc to obviating that necessity. My main want is to trap Escape and set e.Cancel to true, but in addition I'd like to dump most special characters into the keystroke recycler.
Any ideas would be much appreciated - my preference is to NOT use "unsafe" methods, which I think I could do. I'd prefer to implement a "standard" text input control if I have to.
Cheers PhilD
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Not as far as I know, you can only check values before and after they're edited.
There are a couple of controls here (search for treeview) that might to the job but I haven't found one that's very robust yet.
I know the frustrations, trust me 
Formula 1 - Short for "F1 Racing" - named after the standard "help" key in Windows, it's a sport where participants desperately search through software help files trying to find actual documentation. It's tedious and somewhat cruel, most matches ending in a draw as no participant is able to find anything helpful. - Shog9
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Thanks Ed.
I thinks I've got it sussed now
ListViewItem has a Position property which is a Point (why Position and not Location - who knows), TreeNode has a property Bounds which is a Rectangle which includes a Point which is called Location. Both objects have a property which gets you to their respective masters (ie a ListView or TreeView) which have an ImageList property, both ListItem and TreeNode have imageList indices so you can offset by the Image.Size.Width property - except that TreeNode Bounds has already done that for you - and make sure you differentiate between int indexed imagelists and string indexed image lists.
I am now very close to having a "LabelEdit" that provides the functionality of a TextBox++ , it'll be my first contribution to CP.
Cheers PhilD
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pjd1001 wrote: it'll be my first contribution to CP
Look forward to seeing it
Formula 1 - Short for "F1 Racing" - named after the standard "help" key in Windows, it's a sport where participants desperately search through software help files trying to find actual documentation. It's tedious and somewhat cruel, most matches ending in a draw as no participant is able to find anything helpful. - Shog9
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I have created a listview in my C# form and when i add an item through my code I change the background color of my cells/rows. However, when i scroll over them at runtime the color defaults back to white and then they stay white. I have different tab pages in my form. If I switch to a different tab page and then come back the colors will be back where they were until they are selected or scrolled over again. Is this simply a glitch in VS? I have no idea how to fix it. When I enter items into the listview I am using the following code.
ListViewItem li = new ListViewItem(le.TimeStamp.ToString());
//Allows us to use different fonts, backgroud colors, etc. for individual items within a row on the
//list view and for entire rows themselves
li.UseItemStyleForSubItems = false;
string mt = "";
//depending on the type of message that is being logged to the case tab a color indicator is chosen
//to be displayed in the "Indicator" column
switch(le.MessageType)
{
//display a green indicator bar and a message for "Informational"
case "Informational":
{
mt = "Informational";
li.SubItems.Add(mt);
li.SubItems.Add("");
li.SubItems.Add(le.Message);
li.SubItems[2].BackColor = Color.Green;
CaseLogListView.Items.Add(li);
break;
}
I have posted this issue on numerous websites and no one will respond with any kind of solution. Please help.
-- modified at 20:32 Tuesday 13th June, 2006
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I had a little trouble reproducing your problem. Do you have hot tracking on? I noticed it did it when you had hot tracking. Without it, it seems to work fine. I'm assuming you're using "detail" mode.
Logifusion[^]
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I would agree that it has something to do with the hot tracking. I don't know what yet, but I'm working on it.
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Hmm. It's actually the hover selection property. As you mouse over the row, it is selected, making it white. This property must be set to true when hot tracking is set to true - it won't accept another value. If you set it to true while hot tracking is false, the problem still occurs.
Maybe you could owner draw the cells to deal with this problem...?
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fghfghfghfgh
suresh babu.k
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Do you have the HotTracking property on the ListView set to true?
Logifusion[^]
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no i wish it was that easy
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Hi, i have my mainform referenced in my dll proj. I am wondering how i can read a text file and send the text to a textbox on the mainform:
public static void ReadText(string source)
{
using (StreamReader sr = new StreamReader(source))
{
String file = sr.ReadLine();
}
}
Thanks alot for your help!
Don't be overcome by evil, but overcome evil with good
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either pass the textbox as an argument, or make a method in the mainform app available as a delegate to the DLL which it can invoke when it reads the data. Define the delegate in the dllClass which I assume is referenced in your mainform a'la, also define one of these as a property with get/set accessors
"public delegate void _TextProcessor(string _theText);"
public _TextProcessor TextProcessor { get { return theTextProcessor } set { theTextProcessor = value } }
in you mainform write a method that conforms to the delegates "template" and assign it to the exposed property:
private void myTextProcessor(string _text)
{
this.textBox.Text = _text;
this.theBox.Invalidate();
}
dllClass.TextProcessor = myTextProcessor;"
replace your comment in the dllClass with something like "theTextProcessor(sr.ReadLine());"
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Thanks!
Don't be overcome by evil, but overcome evil with good
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Hey pjd i tested out what you gave me and i tried it out but i'm having a few problems. If you could help me out that would be great!
On the mainfrm it isn't giving me the option to add the delegate "TextSender". Once i get that i should be fine with the app part of it. What i would want to put here is textReader.TextSender = ProcessText;
public partial class mainfrm : Form
{
public mainfrm()
{
InitializeComponent();
}
private void rfButton_Click(object sender, EventArgs e)
{
OpenFileDialog open = new OpenFileDialog();
open.Title = "Select A Text File";
open.InitialDirectory = @"C:\";
open.Filter = "Supported Files|*.txt";
open.Multiselect = false;
open.ReadOnlyChecked = false;
if (open.ShowDialog() == DialogResult.OK)
{
foreach (string filename in open.FileNames)
{
textRead.ReadText(open.FileName);
}
}
}
private void ProcessText(string text)
{
textBox1.Text = text;
textBox1.Invalidate();
}
}
The compiler complains when i try to add this.TextSender(sr.ReadLine()) giving the message below. But I need to have that method static so i can call it from the mainfrm (as shown above).
public class textRead
{
public delegate void AddText(string text);
public AddText TextSender
{
get
{
return TextSender;
}
set
{
TextSender = value;
}
}
public static void ReadText(string source)
{
using (StreamReader sr = new StreamReader(source))
{
this.TextSender(sr.ReadLine());
}
}
}
Thanks again for your help!
Don't be overcome by evil, but overcome evil with good
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I don't see where TextSender gets a value - TextSender is a property which needs storage to put its data - in textRead class, under delegate definition put " private AddText _textSender;" that'll set aside some memory for an AddText object.
in the TextSender Property get will return _textSender set will asign _textSender to value
In mainform you need to give textRead.TextSender a value, suggest you do in in constructor textRead.TextSender = ProcessText;
In ReadText suggest you invoke this._textSender
Why not use a handle "because the whip fell off the handle and the wheel went in a rut"
c'ya pjd;)
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Thanks pjd for your help 
Don't be overcome by evil, but overcome evil with good
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