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Thanks for your reply, but is there any way to use ShowDialog? ^^
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Well, since the thread executing the ShowDialog call is effectively blocked until ShowDialog returns, you'd have to create a new thread, give it a reference to the Form you're displaying with ShowDialog() and then let the new Thread operate on myForm2.
But you'll probably run into some problems developing this, inter-thread-calls having to be done via Invoke being the least of them.
Using Show() is the much better alternative IMHO. Easier to implement and to understand.
mav
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After receive some instructions, now I can do what I want.
--------------------
class Form2 : Form
{
public Form1 form1;
...
--------------------
class Form1 : Form
{
...
void Form1_Load(object sender, EventArgs e)
{
Form2 form2 = new Form2();
form2.form1 = this;
form2.Show(); //form2.ShowDialog is still OK
}
...
}
And then we can use "form1" with every methods, properties or controls in Form1 that Form2 have permission to access.
Reference:
http://searchvb.techtarget.com/vsnetATEAnswers/0,293820,sid8_gci875271_tax293474,00.html[^]
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hi,
I would like to find some examples for making draggable toolbar, and so that it can dock to some where.
anyone can give me some hints? thanks
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HI!
There are quite a few articles here on the topic, you might want to use the search function.
One of them is here[^]
Regards,
mav
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Can you help me?
hope for help
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WindowState = Maximized and no bitle bar
modified 12-Sep-18 21:01pm.
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Just set your Form's FormBorderStyle to None and resize your form to match the size of the screen. The screen size can be retrieved using the System.Windows.Forms.Screen class.
Regards,
mav
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I have two windows forms. In the first form I am trying to call a method from the second form. I have created an instance for the second form but it will not let me access the method unless i change it to static but if I change it to static the other calls to controls in that form don't work.
Form 1:
Form frm2 = new Form2();
...
...
frm2.SetupScreen();
Form 2:
public void SetupScreen()
{
this.richtextBox1.Text = "";
......
}
Can someone please help me with this?
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I found the problem.
I used:
Form frm2 = new Form2();
I should of used:
Form2 frm2 = new Form2();
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 DateTimePicker ...How to take it null when binding it to a datetime field?
I have an Customers table (ID,Name,BirthDay(datetime))
and I use DatetimePicker to bind with BirthDay...
and when I don't know the birthday of some Customers ,so I want its value is null....Can you help me????thank you so much...
The man with nothing to lose
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The default Windows.Forms.DateTimePicker cannot be empty. 
Search the articles for "nullable datetime", all you'll find better DateTimePickers, like this one[^] or that one[^]
_________________________________
Please inform me about my English mistakes, I still try to learn your language!
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Hi Khanh,
istead of DateTimePicker.Value = null use DateTimePicker.Value = System.DBNull.Value
Hope that helps
GanDad
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How to create expression column named Age from the existing column BirhtDate?
Sorry for bad English.
Thank You.
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int Age = DateTime.Now.Year - birthDate.Year;
What do you mean by 'expression column' ? You want to show this in a datagrid ? Then you need a column that binds to a function that calls the above code.
Christian Graus - Microsoft MVP - C++
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Hi, Sir.
I mean...
DataColumn c = new DataColumn();
c.Expression = "BirhtDate - DateTime.Now";
Is it possible to create a column like I mean above?
Thank You.
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Well, that expression is wrong, but the answer is I don't know if it can be done directly, I doubt it very much. The Expression needs to be SQL. Actually, SQL Server has a Now property, or something along those lines, I wonder if that would work ?
Try DATEDIFF('yyyy', BirthDate, GetDate()). If that doesn't work, then I'd say nothing will. You definately cannot use C#, you need to use SQL if you do it this way.
Christian Graus - Microsoft MVP - C++
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hi, there is error ina parameter int that SQL function.. the 1st parameter should b DATEDIFF(year,birthday,Getdate())..or DATEDIFF(yyyy,birthday,Getdate()) but the 1st is more accurate i think. that would work as an expression for a column in ur table as it returns only one value
IF u need help...Help the others
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when I bind a dataset to a datagrid (I did it so many times and they always run well but sometimes I meet some mistakes with the same code ...I think that because my database...):
I bind datagrid with a dataset ...and then I use bindingManagerBase.position to move next and pre ,that's normal but when I press the button AddNew(using BindingManagerBase.AddNew()) .It make a new row in datagrid but the cursor don't move to the new row ( It should move when I use the same code in another window form ,it run so well...) and then I can't move Last(after I add a new row in datagrid)...
I don't know why the same code but it takes various result....Could you please to help me?...I must complete this project soon...Thanks first....
The man with nothing to lose
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How to convert bytes in bitmap code
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My image processing code shows you how, basically you need to create the bitmap first, then stuff your bytes into it.
Christian Graus - Microsoft MVP - C++
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How to convert bitmap in bytes code?
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Damn, didn't I just answer this ?
If you want the answer in C# to both this and the question above, read my image processing articles on this site. I've already answered this in C++ today, I assume it was you ?
Christian Graus - Microsoft MVP - C++
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I have an app which is going to use an image library. I'd like to put the library into a DLL which exposes a hashtable, where the names of the images are the keys, and the images are the values. Then I can use the Keys property to get the names for a drop list, and pass the selected names back to get an image.
The thing is, I want to be able to change this dll and replace it without changing the exe. From what I've seen, I think that the compiler binds to the DLL so that if I change it, I need to rebuild. Is there a way of late binding to a dll so that I can do what I want ? Or will it just work and I'm worried about nothing ?
Christian Graus - Microsoft MVP - C++
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