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If by "custom controls" you mean UserControls in WinForms, I have benefited greatly from Matthew MacDonald's excellent book "Pro .NET 2.0 Windows Forms and Custom Controls in C#"[^].
Yes, that's quite an old book now (2004), but the author goes into many details, such as defining custom design-time adornments, and complex Property Browser selection mechanisms for custom controls, in a way that I have found clearer than any material I have read since.
"Science is facts; just as houses are made of stones: so, is science made of facts. But, a pile of stones is not a house, and a collection of facts is not, necessarily, science." Henri Poincare
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Thank you all! This has been a huge help and I have the guidance I need. Thank you for taking the time helping a stranger 
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hi
i need to place on my form buttons as N number
and i need that the buttons will be an array.
for example: N=5
i need to see on screen: [button1] [button2] [button3]
[button4] [button5]
how to do it on C# WinForm FW3.5
thanks in advance
modified 24-Jan-12 9:00am.
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Assuming that you have detailed your requirements correctly, and that you can't use a list (for example), you could do it like this (in pseudocode):
declare array of size n
for count = 0, count less than n
create a new instance of button
set the text of the button
add it to the parent control collection (where parent could be a form, a panel, or the like)
end for
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Don't forget to set the Location of the Button.
I also tend to put have a Panel or GroupBox to hold such dynamic Controls to separate them from the non-dynamic items.
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The solution would be:
public Form1()
{
InitializeComponent();
var buttons = new Button[5];
for (int i = 1; i < buttons.Length; i++)
{
buttons[i] = new Button();
buttons[i].Text = "[button" + i + "]";
buttons[i].Location = new Point(0, 25 * i);
}
Controls.AddRange(buttons);
}
obviously you would have to adjust on your formatting. but thats the general idea. hope this helped.
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Please note the above code would produce #4 buttons, not #5. The array element at position #0 will be undefined.
If the button's width, which you don't specify, is exactly #25, then they will be equally spaced, and not overlap; but that makes an assumption about a button's default width, which can be affected by whether 'AutoSize is 'true, and the width of the 'Text property content.
And, no, I did not down-vote your post.
best, Bill
"Science is facts; just as houses are made of stones: so, is science made of facts. But, a pile of stones is not a house, and a collection of facts is not, necessarily, science." Henri Poincare
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I agree with your statement. This was a rough general idea so he could get started. Not a final solution. Please bare that in mind. Thanks though.
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Hi,
simple Q,
I need to create a basic Form in google docs and send the
Form to 5000 users every month
I was wondering if it possible to send the forms through my application
and later save the results through my application as excel ?
Tanks,
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can i use winform application or NT (service) to retrive the Data?
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Well, as the link includes a .NET client version, I'd say there was a very good chance that it would.
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how to fix the position of a scroll bar....after selecting a row in grid view....suppose if i select a last row in a grid view and trying to perform an operation....the selected row should be freezed...it should not go back to the first row in that grid view...similarly how to do in a table contents...instead of gridview.. .
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This is what I did and it works:
You have a hidden control calls vertscrollpossition and a panel called panel_contents.
This is the code behind:
private void SetScrollPosition(){
string script;
ClientScriptManager CSManager = Page.ClientScript;
if(!CSManager.IsOnSubmitStatementRegistered(this.GetType(),"SaveScrollPosition")){
script = "var HiddenField = document.getElementById('" + vertscrollposition.ClientID + "');\n\r";
script += "var ScrollElement = document.getElementById('" + panel_contents.ClientID + "');\n\r";
script += "HiddenField.value = ScrollElement.scrollTop;\n\r";
CSManager.RegisterOnSubmitStatement(this.GetType(), "SaveScrollPosition",script);
}
if(!CSManager.IsStartupScriptRegistered(this.GetType(),"RetrieveScrollPosition")){
script = "var HiddenField = document.getElementById('" + vertscrollposition.ClientID + "');\n\r";
script += "var ScrollElement = document.getElementById('" + panel_contents.ClientID + "');\n\r";
script += "if(HiddenField.value != '')\n\r";
script += "{\n\r";
script += "ScrollElement.scrollTop = HiddenField.value;\n\r";
script += "}\n\r";
CSManager.RegisterStartupScript(this.GetType(), "RetrieveScrollPosition",script, true);
}
}
This is the aspx code:
<asp:Panel ID="panel_contents" Height="175" Width="800" runat="server" ScrollBars="Vertical" ViewStateMode="Enabled" EnableViewState="True">
</asp:Panel>
<asp:HiddenField ID="vertscrollposition" runat="server" />
V.
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Have you tried setting MaintainScrollPositionOnPostback="true" on your page? If that works, that would be the easiest to do.
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Hi,
I am trying to connect to mySql using C# but getting this error:
Quote: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
I have added the port thinking it could solve the issue! but still the same.. here is my connection string:
<add name="SQLdb" connectionString="server=192.168.0.1;port=3306;User Id=root;password=Mxjxaxax0x1;Persist Security Info=True;database=cure"
providerName="MySql.Data.MySqlClient" />
please help...
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The answer is bound to be here
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Thanks BUT
now this is my connection in the App.config:
<add name="SQLdb"connectionString="server=192.168.0.1;port=3306;Uid=root;Pwd=xxxxxxxxx;database=cure;" providerName="MySql.Data.MySqlClient" />
but I am still getting:
A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
just one notes:
The same code is working if I run the application on the server itself (using IP not localhost)
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What happens if you try to connect to the database using a standard MySQL client? It almost looks like a firewall may be blocking your connection.
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it works when I connect using mySQL client
but the good news..
I figured out the problem...
I just address connection timeout=120
it seems like it's taking time to connect!
anyhow..
thanks...
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Hi,
can anyone guide plz..
I want to save the sqlConnection parameters in an encrypted file so the WinForm application will read the host, database, user name, and password from that file.. The file will be distributed with the application..
Regards,
jkassim
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Just store it in your app.config file in the ConnectionStrings section. You can then encrypt this section, using techniques discussed here[^].
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