Sample Code in C#

FaceBook Blocked

2010-08-30T18:27:00.000-07:00

Hi Guys,

Is your facebook website blocked? Try to download the file thru this link FACEBOOK Browser . This is only a demo and need to enhance. Any Comments and Suggestion are welcome.

Thanks.

VISUAL STUDIO 2010 GLOBAL LAUNCH

2010-04-12T20:24:00.000-07:00

Hello Guys,

The Visual Studio 2010 is here.

You can test by downloading the free trial at this link http://www.microsoft.com/visualstudio/en-us/download and view the products features in this link http://www.microsoft.com/visualstudio/en-us/products .

You can even watch the live launch at http://www.microsoft.com/visualstudio/en-us/watch-it-live

Happy Programming.

Download Visual Studio 2010 Beta 2

2009-11-06T21:35:00.000-08:00

Hello guys.

Last month’s I downloaded the Visual Studio 2010 Beta 1. While exploring the VS 2010 Beta 1 I decided to make some blogs about it. But now the Beta 2 will release and ready to download on Wednesday October 21, 2009. Maybe I should download it and uninstall my Beta 1 and install the Beta 2. But this is also a Beta Version. The final release of Visual Studio 2010 and .NET Framework 4 are scheduled on March 22, 2010. And also there’s another options of developers will choose, because theirs four packages of VS 2010. The Ultimate, Premium, Professional, and Professional without MSDN subscription.

Download Now: http://msdn.microsoft.com/en-us/vstudio/dd582936.aspx
Beta 2 Walkthroughs: http://msdn.microsoft.com/en-us/vstudio/dd441784.aspx
Downloading and Installing: http://channel9.msdn.com/shows/10-4/10-4-Episode-33-Downloading-and-Installing-Visual-Studio-2010-Beta-2/
Visual 2010 Samples: http://msdn.microsoft.com/en-us/dd238515.aspx
Some Details About Packages: http://blogs.msdn.com/jasonz/archive/2009/10/19/announcing-vs2010-net-framework-beta-2.aspx

ShortCut Keys on VS 2010 and MS SQL 2008

2009-11-06T21:33:00.000-08:00

Hello Guys,

I have some shortcut keys on Visual Studio 2010 Beta1 and SQL Server 2008. You can download it: Shortcut Keys on Visual Studio 2010 and Shortcut Keys on SQL Server 2008

Creating XML File on Visual Studio 2010

2009-11-06T21:31:00.000-08:00

Hello Guys,

This code snippet will show you on how to create a simple xml file in Visual Studio 10 Beta 2.

Step 1: Add a namespace to your code behind System.Xml and System.Text

Step 2: In your event/method to create an xml file

//Create a path were to save the xml file
String path = Server.MapPath(@”FolderName\MyFileName.xml”);

//Instantiate an XmlWriterSettings
var xmlWrite = new XmlWriterSettings();

//And other Declaration
xmlWrite.Indent = true;
xmlWrite.OmitXmlDeclaration = true;
xmlWrite.Encoding = Encoding.ASCII;

//Then try to write a data in xml file
Using (var write = XmlWriter.Create(path,xmlWrite))
{
write.WriteComment(“This is a basic sample on how to create xml file”);
write.WriteStartElement(“Head”);
write.WriteStartElement(“Header”);
write.WriteStartAttribute(“Header”);
write.WriteValue(HeaderValue);
write.WriteEndAttribute();
write.WriteEndElement();
write.WriteStartElement(“Footer”);
write.WriteStartAttribute(“Footer”);
write.WriteValue(FooterValue);
write.WriteEndAttribute();
write.WriteEndElement();
write.Flush();
}

That’s it. This sample created on asp.net project.

Simple CRUD on Visual Studio 2010

2009-11-06T21:28:00.000-08:00

Hello Guys,

I have sample here on how to create a simple Create, Read, Update, and Delete on Database. This sample created on Visual Studio 2010 Beta 2 using C# and Asp.Net. I did’nt include a validation on this sample. I only want to show on how to Select, Insert, Update, Delete on Database. For those who beginners I hope it will help.

You can now download my Sample File at this Link.

How to Drag Object

2009-06-21T22:32:00.000-07:00

Hi, this simple code will show you on how to drag a form with out window title bar.

1. Just input this code in your form code behind:

//Drag Forms w/out titlebar
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HT_CAPTION = 0x2;
[DllImportAttribute("user32.dll")]
public static extern int SendMessage(IntPtr hWnd,
int Msg, int wParam, int lParam);
[DllImportAttribute("user32.dll")]
public static extern bool ReleaseCapture();
//End

2. Input a Panel in your form as your title bar.

private void panel1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
ReleaseCapture();
SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
}
}

Alt Keys in C#

2008-08-31T23:19:00.000-07:00

This sample code show on how to use Alt and Ctrl keys.

Try this code insert to your Form1_Keycode Event:

if ( e.Alt && e.KeyCode == Keys.S)
{//Pressed Alt+S}

else if (e.Alt && e.KeyCode == Keys.A)
{//Pressed Alt+A}

else if (e.Control && e.KeyCode == Keys.Y)
{//Pressed Ctrl+Y}

else if (e.Control && e.KeyCode == Keys.R)
{//Pressed Ctrl+R}

else if (e.Control && e.KeyCode == Keys.E)
{//Pressed Ctrl+E}

Hope this one can help you.

Numeric TextBox and One Period

2008-08-28T19:56:00.000-07:00

Hello guys.

I have sample here to show how to implement a numeric only to your textbox. tnx to mr.solitaire for the idea.

Put this code to your textbox in keypress.

bool dot = false; /for period
bool flag = false; /for minus

if (e.KeyChar == '\b') return;
if (e.KeyChar == '.' & textBox1.Text.IndexOf('.') > 0) dot = true;
if (textBox1.Text.StartsWith(".")) /if its dot first then
{ textBox1.Text = "0."; textBox1.SelectionStart = 3; }
if (e.KeyChar < '-' e.KeyChar > '9' dot == true) flag = true;
if (textBox1.Text.Length > 0 & e.KeyChar == '-') flag = true;
if (e.KeyChar == '/') flag = true;
if (flag == true) e.Handled = true;

Hope this one will help.

Check Item in listview if exist

2008-08-28T00:28:00.000-07:00

Hello guys.

This sample code will show on how to check if the item in the listview is already existing.

// create a bool
bool found = false;

foreach (ListViewItem LVI1 in listView1.Items)
{
if (LVI1.Text == textBox1.Text)
{ found = true; }
}

if (!found)
{
ListViewItem LVI = new ListViewItem(textBox1.Text, 0);
LVI.SubItems.Add(textBox2.Text);
LVI.SubItems.Add(textBox3.Text);
listView1.Items.Add(LVI);
}
else
{ MessageBox.Show("Found " + textBox1.Text ); }

Encrypt and Decrypt in C#

2008-08-21T19:02:00.000-07:00

How to encrypt and decrypt text in C#?

I have simple way to do it.

Creat a form. 3 textbox and 2 command button.

private void button1_Click(object sender, EventArgs e)
{
textBox2.Text = Convert.ToBase64String(Encoding.Unicode.GetBytes(textBox1.Text));
}

private void button2_Click(object sender, EventArgs e)
{
textBox3.Text = Encoding.Unicode.GetString(Convert.FromBase64String(textBox2.Text));
}

How to Insert with Progress Bar C-Sharp

2008-06-25T18:43:00.000-07:00

Hello guyz. In this code show you on how to use the progress bar with Insert command.

First Step:

OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = "your connectionstring";
conn.Open();

int i;
int x = 1000; //insert 1000 rows
Bar.Maximum = x; //Bar ( Your progressbar)

for (i = 0; i < x; i++)
{
string sQL = "Insert Into table1" & _ "(empid,dates,username) values ('COLLADO','11/4/1982','Sayre')";

OleDbCommand cmd = new OleDbCommand(sQL, conn);
cmd.ExecuteNonQuery();

Bar.Value = Bar.Value + 1;
pr = Bar.Value;
pr1 = pr / x;
pr2 = pr1 * 100;
lblpercent.Text = pr2.ToString(); //show the percent in label
Application.DoEvents();
}

//Get the total row in the table
string sQL1 = "select * from table1";
OleDbCommand cmd1 = new OleDbCommand(sQL1, conn);
DataSet ds = new DataSet();
OleDbDataAdapter da = new OleDbDataAdapter(cmd1);
da.Fill(ds);
string ss = ds.Tables[0].Rows.Count.ToString();

How to change background color of Listview in C#

2008-05-16T20:09:00.000-07:00

Hello guyz. I have simple code here to change the background color of Listview and it's cells during runtime.

Step 1:
Create first a Listview.

Step 2:
Put this code at your form_load event.

listView1.Items.Add("Hello World");
listView1.Items[0].SubItems[0].BackColor = Color.Blue;

How to Clear all Text in a TextBox in C#

2008-05-14T23:54:00.000-07:00

Im using C sharp 3.0

Try This Codes:

private void button1_Click(object sender, EventArgs e)
{
foreach(Control sayre in this.Controls)
{
if (sayre is TextBox)
{
(sayre as TextBox).Clear();
}
}
}

How to Get Date and Time Difference in C#

2008-05-14T00:06:00.000-07:00

Hello guyz. I have example here on how to get the difference of date and time in C#.

Step: 1
Create a timer then set the interval to 10 and enabled to true.

Step: 2

Create 3 Label. Label1,Label2,Label3.

Step: 3

Create 2 Datepicker. Name it dtfrom and dtto.

Step: 4
Create a Button1

Then Copy this Code at your form:

private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
{label1.Text = dtfrom.Value.ToString();}
private void timer1_Tick(object sender, EventArgs e)
{label2.Text = string.Format("{0:G}", DateTime.Now);}
private void button1_Click(object sender, EventArgs e)
{
TimeSpan ts = new TimeSpan();
DateTime dt1,dt2 = new DateTime();
dt1 = dtfrom.Value;
dt2 = Convert.ToDateTime(label2.Text);
ts=dt1.Subtract(dt2);
label3.Text = ts.ToString(); //Answer
}

Different Date Format in C#

2008-05-08T22:21:00.000-07:00

DateTime sai = DateTime.Now; //Get Date and Time

Console.WriteLine("d format: {0:d}", sai);
Console.WriteLine("D format: {0:D}", sai);

Console.WriteLine("t format: {0:t}", sai);

Console.WriteLine("T format: {0:T}", sai);

Console.WriteLine("f format: {0:f}", sai);

Console.WriteLine("F format: {0:F}", sai);

Console.WriteLine("g format: {0:g}", sai);

Console.WriteLine("G format: {0:G}", sai);

Console.WriteLine("m format: {0:m}", sai);

Console.WriteLine("M format: {0:M}", sai);

Console.WriteLine("r format: {0:r}", sai);

Console.WriteLine("R format: {0:R}", sai);

Console.WriteLine("s format: {0:s}", sai);

Console.WriteLine("u format: {0:u}", sai);

Console.WriteLine("U format: {0:U}", sai);

Console.WriteLine("y format: {0:y}", sai);

Console.WriteLine("Y format: {0:Y}", sai);

Console.Read();

Opening Single Window at MDI Form C#

2008-04-28T17:56:00.000-07:00

Hello guys. This simple example codes will open a single window. I have 2 ways of opening a window in MDI Form in C#.

1) Creating a Instance in a Form
2) Just create a variable of a Form

Example 1:

-Create a MDI Form and a Form1.

*At you Form1 write this codes:

private static Form1 sForm = null;
public static Form1 Instance()
{
if (sForm == null)
{ sForm = new Form1 (); }
return sForm;
}

protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
sForm = null;
}

*In the MDI Form button for showing a Form1 write this codes:

Form sForm = new Form1.Instance();
sForm.MdiParent=this;
sForm.show();
sForm.Activate();

Example 2:

-Create a MDI Form and a Form1.

*Write this codes at your MDI Form:

//Create a variable:
private Form1 frm1 = new Form1();
//Button showing a Form1:
frm1.MdiParent=this;
frm1.show();

I hope this 2 ways of example can help you for those dont known on how to open a single window at C#.

How to Pass values to another Form

2008-04-10T20:38:00.000-07:00

Ok. Lets say you have 2 Forms. Form1 and Form2.
In Visual Basic 6 this is simple codes with 1 line only: Form2.text1.text = Form1.text1.text

Thats so Simple.

But in C# not 1 line code. I have 2 ways to get a text from Form1/Form2.

FIRST WAY:

1.) Goto Form1 then Double Click it. At the code type this.

public string CaptionText
{get {return textBox1.Text;}
set { textBox1.Text = value; }}

note: the value of your textbox1.text = sayre;

2.) Goto Form2 then Double click it. At the code type this.

// At your command button In Form2
private void button1_Click(object sender, EventArgs e)
{
Form1 sForm1 = new Form1();
textBox1.Text = sForm1.CaptionText;
}

SECOND WAY:

1.) Goto Form2 then Double click it. At the code type this.

public Form2(string sTEXT)
{
InitializeComponent();
textBox1.Text = sTEXT;
}

2.) Goto Form1 then Double click it. At the code type this.
//At your command button in Form1
private void button1_Click(object sender, EventArgs e)
{
Form2 sForm = new Form2(textBox1.Text);
sForm.Show();
}