Hi, Considering the following code: using(mySQLconn) { if (someCondition==true) return 0; //more code after return //do some db calls } return 1; Will .mySQLconn.Dispose(); still be invoked even when return is called? Thank you ...more >>

How can I load a blob of an image from an SQL server to an object in RAM instead of outputting to a file, and then loading it?...more >>

I have an Windows application that displays lots of different colored = lines in a Panel by using the Graphics.DrawLine method. The location and = length of each line comes from a database query that takes two minutes = to complete. I am using the Panel's Paint event to call my drawing method,...more >>

Hi to All, To reproduce: The expression: object result = flag ? (long) 0 : (double) 0; always evaluated as a double... see dissassembly to ensure the bad compiled code. Just for sure: if (flag) { result = (long) 0; } else { result = (double) 0; } works correctly. T...more >>

the output of the following codes is "greater than zero", which is rather strange! the correct one should be "not greater than zero" int a = 0x79de61c0; //2044617152; a += 0x12345678; //a is 0x8c12b838 //-1944930248 if (a > 0) { Console.WriteLine("greater than zero");...more >>

Hi, I have just started using c# and this might be a stupid question. I have 2 Forms (Form1 & Form2). I want to create a procedure in Form2 which I can call from Form1 but I cannot find a way to do it. I found how to define a variable and call it from Form1 but I cannot find a way to do the...more >>

Hello there This might be the wrong group to post this message for me, but since this is to do with "#". I had a Compiled HTML Help file (.chh) named "Windows Form Programming in C#". Since I got it, every time I try to open it and it gave me an empty file. I replaced C# with CSharp in fold...more >>

Hi, if i've 3 projects in my solution, is possible to make one dll from these projects? All projects has the same namespace and are writings in C#. Thanks! ...more >>

It seems to me that C# has a serious issue regarding const. It's not possible to have a method parameter declared as const. Often you will want to call a method, and you don't want the method to modify the class you are sending a reference to. Also it's not possible to declare a method as const...more >>

Hi while browsing the net i noticed that there is sites publishing some software that claim that it can decompile .net applications i didn't bleave it in fact but after trying it i was surprised that i could retrieve my code from my applications after i compile it so i need to know to prevent ...more >>

Hi All, I am working on a project, where maximum operations carried out on Files and multi-dimensional arrays. Since array data is huge application takes too much memory. My problem is, after few operations, toolbar on MDI from doesn't catch "Click" event. But it catch all other events lik...more >>

How do I reference a WinForm file (i.e. Class) in Project B from a WinForm file in Project A? I've previously used Tutorial: Creating C# Class Library (DLL) Using Visual Studio .NET http://www.c-sharpcorner.com/2/pr12.asp to create a dll reference for Project A but how do you reference a fo...more >>

Hi, I am using codeDom class to compile on fly some c# code. I want to restrinc to use some assembly, i don't know if assembly is the best word, i want to forbid to use class like System.IO.File or System.IO.Directory, how can i do it?? I thought i can do it parsing the code looking for ...more >>

Mostly always you use the using clause you deal with native ressources, so exception handlinjg is sooner or later inevitable. so why do we need to write try { using (File f = File.CreateText("bla.txt")) { } }catch (IOExcepion e) { } why don't we allow catch blocks directly at...more >>

The first one is: Cannot implicitly convert type 'int' to 'bool' The second one: 'System.Windows.Forms.FormWindowState' is a 'type' The code is: private void button6_Click(object sender, EventArgs e) { int i; if (i = 2) { ...more >>

I have created a "Send To" application that allows users to rename files. The user selects files in Windows Explorer, right clicks and selects Send To > File Renamer. The problem is when a large number of files are selected, the app gives an error that says "Windows cannot access the specified...more >>

Hi all. I was hoping some of you could recommend a book or two that would help me get started with the basics of C#. I have a slight knowledge of programming, but basically I want to start out like I know nothing, so I don't skip anything. I considered Microsoft Visual C# .NET Step by Step ...more >>

I would like to build a web Administrative control panel to update a website. Like have it where you just type in some text and hit upload and now it on your site...more >>

Hi, Is there a way to test with command line argument while developing and debugging within my VS .NET IDE? I heard that there's a simple way to do this. Thanks. Rick ...more >>

Hey Gang, I'm writing my first custom component and am trying to add the text that describes the custom properties. I'm talking about the text that displays in the property inspector (design time) when you highlight a property, in the bottom box that describes what it is for. I've tried...more >>

I have a base class with all abstract methods. I need to inherit from this base class but the new class will have all static methods. Is there a way to do this? I tried using new but then it complains that the base method hasn't been implemented. Thanks, Joe ...more >>

Iam trying to pack some bits and create a client request packet using a Byte[] array. To test the "endianess" I tried a small sample and used the BitConverter to print the actual values ... and the out does not seem right ..... the sample code and the output is shown below. What Am I missin...more >>

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Hi,all I have a trouble about struct variable,the detail is : I define a new struct which name ServiceProperty,then I declare a variable like this: ServiceProperty instService = null; but compile throw error: error CS0037: ÎÞ·¨½« NULL ת»»³É ¡°ServiceProperty¡±£¬ÒòΪËüÊÇÒ»ÖÖÊýÖµÀàÐÍ ...more >>

Hello, I recently downloaded 'Microsoft Visual C# 2005 Express Edition Beta'. It's been brilliant, but I couldn't help wondering what more you get when you buy 'Visual Studio .NET'. There must be some considerable advantages of using it considering its price. So I'm asking you what 'Visu...more >>

Hello, I'm absolutely new to programming, so please don't be too hard on me... I'm trying to make a simple form application to hide or show hidden files. When I try to run the application I get a "System.NullReferenceException: Object reference not set to an instance of an object."...more >>

Example: public class MyComboBox : System.Windows.Forms.ComboBox; { public bool CanDropDown = true; public MyComboBox() { } } Prease help me how modify this class for if CanDropDown = false, the user can not open the drop down list of the combobox. I do'nt want to...more >>

Cannot accept null value in parameter list My SQL Server can accept null value on field CustomerName When I run this example SqlConnection nwindConn = new SqlConnection("Data Source=(local);Integrated Security=SSPI;Initial Catalog=northwind"); SqlCommand selectCMD = new SqlCommand("SELE...more >>

I can send email out in Windows C# program in XP by using SmtpMail. but I can not send email in ASP.NET web application. The emails are kept in ...\Inetpub\mailroot\Queue folder. This also occured in Windows 2003 server. What is the problem? Is some settings that I did not do it properly? Shaw...more >>