Hi!,

I think your account doesn’t have enough privileges to create the ldb file. Please have a look at this link - http://support.microsoft.com/kb/251254/en-us

Think about common event handler for buttons,

...
private void Form1_Load(object sender, EventArgs e)
{
button1.Click += new EventHandler(commonHandler);
...

Subtract two dates.

DateTime d1 = DateTime.Parse("11/18/2009 18:15");
DateTime d2 = DateTime.Parse("11/25/2009 01:35");

TimeSpan ts = d2 - d1;
Console.WriteLine("Seconds : {0} Minutes...

>I have a windows application that prints a record in a given page size.

I don't think there is a big problem with windows application. Use crystal report or microsoft report.

I assume that the field data type of ssk_matrah field is float.

if (oku4.Read())
{
if(!oku4.IsDBNull(0)) {
nSSKMatrahi = oku4.GetDouble(0);
...

>But do nothing.
I think FormClosing event is not handled properly. Add handler for Form's FormClosing event. (Look at property windows).

Take a look at this thread - http://www.daniweb.com/forums/thread238903.html

From MSDN online page - FileSystemWatcher Class (http://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher.aspx).

SUMMARY:
It listens to the file system change notifications and raises...

?Is it possible to use it to pass an unspecified number of arrays of objects?
Yes you can do this.

void methodName(params object []v){
...
}

Use BETWEEN caluse - BETWEEN returns TRUE if the value of test_expression is greater than or equal to the value of begin_expression and less than or equal to the value of end_expression.


SELECT...

You cannot change DataType of column if it has data already. Why not just add a column and remove a column than in this case?

Use SplitContainer instead of MDI. Check this out - The docking library for .Net Windows Forms. (http://sourceforge.net/projects/dockpanelsuite/)

Hi danny.
You have to handle formclosing event along with singleton (http://hashfactor.wordpress.com/2009/03/31/c-winforms-create-a-single-instance-form/) - single instance of Form.

Try,

FileStream fs = new FileStream(System.IO.Path.GetTempPath() + @"\MyTempDir\" + listBox1.SelectedValue, FileMode.Create);

Take a look at this article - http://msdn.microsoft.com/en-us/library/dd562851(VS.85).aspx

Reset the stream position before instantiate the reader.

xmlStream.Position = 0;
XmlReader reader = XmlReader.Create(xmlStream);
reader.MoveToContent();
.....

Good suggestion from scott. Here is a good example to play a video using DirectX - http://www.codeproject.com/KB/graphics/zMoviePlayer.aspx. You may use MCI...

@jonahmano: ddanbe you are wrong.
No. He gave you a solution. Use Write Method.

Console.Write("Enter Name : ");
value=Console.ReadLine();

For checkBox, use Checked and CheckState property.
List and ComboBox; use SelectedValue property.

Take a look at this MSDN article - http://msdn.microsoft.com/en-us/library/ms971481.aspx

Your process is the one that uses file, you need to set image to null use something like this,


using(var img = Image.FromFile(filename).GetThumbnailImage(GetWitdth(filename, GetHeight(filename,...

Use ExecuteScalar method.


string emp_commnd = "Select count(*) from emp_attandence where
Attandence='A'";
OleDbCommand commd = new OleDbCommand(emp_commnd,
...

private void CompareWithDatabase(){
string cmdStr = "SELECT CurrentPassword
AdminPassword WHERE [UserName] = ?";
OleDbCommand select = new OleDbCommand(cmdStr, ...

str="Select count(*) from TableName where Attendance='A'";
str1="Select count(*) from TableName where Attendance='P'";

private void CompareWithDatabase()
{
vlAccessConnection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + DBFileName);

vlAccessConnection.Open();
string cmdStr =...

You have to use SELECT sql statement with WHERE clause.

Destructor is a very special method of class and it is used to implement object specific cleanup code. Unreferenced objects are released by the Garbage collector.

Take a look at online book at google - Physics for game programmers By Grant Palmer...

Maybe your code needs,

dataGridView1.EditMode = DataGridViewEditMode.EditOnEnter;

Use parenthesis.

listView1.Items.Add(lcount.ToString());

Take a look at this code,

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Linq.Expressions;

class MainApp
{

Thanks Scott for the nice explanation on formatting issue using Generic and StringBuilder.

Text from WikiPidia (http://en.wikipedia.org/wiki/Generic_programming),

SUMMARY:
Generic programming is a style of computer programming in which algorithms are written in terms of...

Take a look at MSDN page - Composite Formatting (http://msdn.microsoft.com/en-us/library/txafckwd.aspx)

Push initial values to an array,

....
arr[0]=cmb1.Text;
....

Detect changes,

if(ar[0]!=cmd1.Text ......) {
// statements

You can't stop the execution of base class constructor.

Constructors of base/super class are always executed before the execution of derived class constructor. By default, a no argument...

string[] ar = listBox1.SelectedItems.Cast<string>().ToArray<string>();

Arrays are reference (http://msdn.microsoft.com/en-us/library/490f96s2(VS.71).aspx) types.

Use DateTime.TryParseExact (http://msdn.microsoft.com/en-us/library/ms131044.aspx)

Take a look an article using alpha transparency (http://www.codeproject.com/KB/GDI-plus/LovelyGoldFishDeskPet.aspx)