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It allows you to return a value from a method. Basically, it returns a value that is appropriate to the return type of the method; so if you were trying to pass a string back out of your method to the calling code, your method would be defined with the string as the type for the method, then you use something like
return "This is my string";
modified 14-May-12 16:13pm.
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Pete O'Hanlon wrote: ur
Pete, what were you thinking! 
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I posted from my tablet without reading what I was typing. Unfortunately the Android keyboard really sucks. I'm on the laptop now, so I shouldn't have missing letters.
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Is that from your galaxy 10.1?
I wish they would get their finger out and get an official ICS update pushed out. Chrome on ICS is so much better than the standard browsers. (well it is anyway on my Nexus phone!)
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DaveAuld wrote: Is that from your galaxy 10.1?
Yup.
I just want them to get the Chrome browser sorted out. It's ironic how much it sucks on an Android tablet.
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I am sure I read that Chrome Browser has dependency on ICS so, no Chrome browser on < Android 4
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Well, they do have a browser on there that they call Chrome. Unfortunately, it's not the proper Chrome version - that's ICS+ only.
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Hello, I'm trying to do a program in C # to replace pages in a PDF file to another!
I can get a page like this:
PdfReader reader = new PdfReader (PdfFilePath);
iTextSharp.text.pdf.PdfImportedPage page = pdfCpy.GetImportedPage (reader, pageNumber);
pdfCpy.AddPage (page);
How to replace such page by page 15 to page 15 of another PDF file?
Someone can help me? Please!
Sincerely,
Killzone DeathMan
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This may be stating the ****ding obvious but:
- Open pdf file1 and file2 for input.
- Open pdf file3 for output.
- Read pages 1 to 14 from file1 and write to file3.
- Read page 15 from file2 and write to file3.
- Read remaining pages from file1 and write to file3
- Close all files.
file3 now contains a copy of file1 with page 15 changed.
Programming is work, it isn't finger painting. Luc Pattyn
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Thanks for the algorithm!
I will try!
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Hi,
How can I get the calculated size from an AutoSize TableLayoutPanel row ?
tia
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Hi,
I am getting the above error with the below details when I install the application as package on another PC but the same application is running fine on my local PC. The stored procedure has no problem because I am able to invoke the code on the server directly.. so where is the problem? kindly assist...
here is the error:
See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.
************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
at PriceList.frmMain.populate_family_physician()
at PriceList.frmMain.frmMain_Load(Object sender, EventArgs e)
at System.Windows.Forms.Form.OnLoad(EventArgs e)
at System.Windows.Forms.Form.OnCreateControl()
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.Control.CreateControl()
at System.Windows.Forms.Control.WmShowWindow(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.Form.WmShowWindow(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
************** Loaded Assemblies **************
mscorlib
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 (RTMRel.030319-0100)
CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll
----------------------------------------
PriceList
Assembly Version: 1.0.0.0
Win32 Version: 1.0.0.0
CodeBase: file:///C:/Program%20Files/RMC/Price%20List/PriceList.exe
----------------------------------------
System.Windows.Forms
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 built by: RTMRel
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 built by: RTMRel
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 built by: RTMRel
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
DevExpress.XtraEditors.v11.1
Assembly Version: 11.1.4.0
Win32 Version: 11.1.4.0
CodeBase: file:///C:/Program%20Files/RMC/Price%20List/DevExpress.XtraEditors.v11.1.DLL
----------------------------------------
DevExpress.XtraGrid.v11.1
Assembly Version: 11.1.4.0
Win32 Version: 11.1.4.0
CodeBase: file:///C:/Program%20Files/RMC/Price%20List/DevExpress.XtraGrid.v11.1.DLL
----------------------------------------
DevExpress.Utils.v11.1
Assembly Version: 11.1.4.0
Win32 Version: 11.1.4.0
CodeBase: file:///C:/Program%20Files/RMC/Price%20List/DevExpress.Utils.v11.1.DLL
----------------------------------------
DevExpress.Data.v11.1
Assembly Version: 11.1.4.0
Win32 Version: 11.1.4.0
CodeBase: file:///C:/Program%20Files/RMC/Price%20List/DevExpress.Data.v11.1.DLL
----------------------------------------
DevExpress.Printing.v11.1.Core
Assembly Version: 11.1.4.0
Win32 Version: 11.1.4.0
CodeBase: file:///C:/Program%20Files/RMC/Price%20List/DevExpress.Printing.v11.1.Core.DLL
----------------------------------------
System.Xml
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 built by: RTMRel
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
System.Data
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 (RTMRel.030319-0100)
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.Data/v4.0_4.0.0.0__b77a5c561934e089/System.Data.dll
----------------------------------------
System.Core
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 built by: RTMRel
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll
----------------------------------------
System.Configuration
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 (RTMRel.030319-0100)
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
MySql.Data
Assembly Version: 6.3.5.0
Win32 Version: 6.3.5.0
CodeBase: file:///C:/Program%20Files/RMC/Price%20List/MySql.Data.DLL
----------------------------------------
System.Transactions
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 (RTMRel.030319-0100)
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.Transactions/v4.0_4.0.0.0__b77a5c561934e089/System.Transactions.dll
----------------------------------------
************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.
For example:
<configuration>
<system.windows.forms jitDebugging="true" />
</configuration>
When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.
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The messages:
System.NullReferenceException: Object reference not set to an instance of an object.
at PriceList.frmMain.populate_family_physician()
at PriceList.frmMain.frmMain_Load(Object sender, EventArgs e)
show you where the error occurs. You need to look at the code at that point in order to determine which object has not been correctly initialised.
Programming is work, it isn't finger painting. Luc Pattyn
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This error happens when you try to use a property of an object that is null. More details: here[^]
A simple use of Visual studio DEBUGGER can tell you the object because of which it is happening. Just look at the stack trace and put a debugger on that line. Check the objects of that line and see if any one is null and you are trying to use that objects property. Handle the same.
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Sandeep Mewara wrote: This error happens when you try to use a property of an object that is null.
More details:
Or call a method on the object.
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Yep, right. Thanks for adding it.
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here is the code:
private void populate_family_physician()
{
this.Cursor = Cursors.WaitCursor;
data_table = new DataTable();
sql_connection = new MySqlConnection(ConfigurationManager.ConnectionStrings["SQLdb"].ConnectionString);
sql_connection.Open();
sql_command = new MySqlCommand("sp_get_pricelist_by_code", sql_connection);
sql_command.CommandType = CommandType.StoredProcedure;
sql_command.Parameters.AddWithValue("param_pricelist_code", "FamilyPhysician").MySqlDbType = MySqlDbType.VarChar;
sql_adapter = new MySqlDataAdapter(sql_command);
sql_adapter.Fill(data_table);
dataFamilyPhysician.DataSource = null;
dataFamilyPhysician.ResetBindings();
dataFamilyPhysician.DataSource = data_table;
gridFamilyPhysician.Columns["price_list_id"].Caption = "price_list_id";
gridFamilyPhysician.Columns["price_list_id"].AppearanceHeader.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Center;
gridFamilyPhysician.Columns["price_list_id"].AppearanceCell.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Center;
gridFamilyPhysician.Columns["price_list_id"].Width = 80;
gridFamilyPhysician.Columns["price_list_id"].Visible = false;
gridFamilyPhysician.Columns["price_list_description"].Caption = "Description";
gridFamilyPhysician.Columns["price_list_description"].AppearanceHeader.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Default;
gridFamilyPhysician.Columns["price_list_description"].AppearanceCell.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Default;
gridFamilyPhysician.Columns["price_list_description"].Width = 150;
gridFamilyPhysician.Columns["price_list_price"].Caption = "Price";
gridFamilyPhysician.Columns["price_list_price"].AppearanceHeader.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Center;
gridFamilyPhysician.Columns["price_list_price"].AppearanceCell.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Center;
gridFamilyPhysician.Columns["price_list_price"].DisplayFormat.FormatType = DevExpress.Utils.FormatType.Numeric;
gridFamilyPhysician.Columns["price_list_price"].DisplayFormat.FormatString = "#,###,##0.000";
gridFamilyPhysician.Columns["price_list_price"].Width = 50;
this.Cursor = Cursors.Default;
}
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Is sql_connection defined properly?
Any specific reason you have this line of code: dataFamilyPhysician.ResetBindings(); ?
Rest looks fine as such.
If you are unable to debug it on your system then start writing logs after few lines to track the culprit.
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Check that following variables are not null before using them:
- dataFamilyPhysician
- gridFamilyPhysician
- gridFamilyPhysician.Columns["price_list_id"]
- gridFamilyPhysician.Columns["price_list_description"]
- gridFamilyPhysician.Columns["price_list_price"]
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Add some logging to your programs - that will help a lot when you try to find the cause of an error.
You could also use the *.pdb files - thus the line number where the error occured will be shown, and then it's generally easy to determine which of the objects involved was null.
From your function name, I guess that you want to fill a combobox/ listview with data from a list. Are you sure that that list is not null?
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I found where is the problem guys..
The App.Config file was not deployed with the project.
I guess Microsoft error must be more clear in such case 
Thanks everyone.
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Hi you'll. I'm a newbie C# programmer. My project is to find unmatched records of two tables in sql database. The two tables are both transactions and i need to find the discrepancies. The columns include date,time,transaction ID and amount. I'm having difficulty because the tables are not identical, meaning both tables have extra column that I don;t need to match. What tools do I need to do this project. Please help.
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First and foremost: Logic.
How do you define what an "unmatched" record is? What is the logic that determines this?
How many records are you going to "scan" through, worst case?
Once you have that, you can figure out what the best method is to approach this, and the "tools" you're going to need.
If you're talking about which designers you'r going to use, forget it. Write this entirely by hand. You'll have a much better understanding of what's going on.
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I second what Dave said. You'll need to have two essential tools -- a way to sort the lists and a way to compare the items.
Once you have those, I suggest a MasterFileUpdater[^].
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if this is an SQL database i think you should use SQL...
try adding a where clause to your query so it just returns the matching records...
I'm brazilian and english (well, human languages in general) aren't my best skill, so, sorry by my english. (if you want we can speak in C# or VB.Net =p)
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