using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using System.Data.Sql;

namespace AnalyzeFlora_VS2008
{
static class dbconn
{
public static SqlConnection dbConnection;
public static void connectSQLServer()
{
dbConnection = new SqlConnection(“Data Source=ADMIN-ITSD;Initial Catalog=Florabank_online;User ID=sa;Password=fsbank;”);
dbConnection.Open();
}

public static void db_conn_status()
{

MessageBox.Show(dbConnection.State.ToString());
//return dbConnection.State.ToString();
}

}
}

Now in any form call dbconn.connectSQLServer in form load. Full code of form1.cs
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
dbconn.connectSQLServer(); //Create Connection with SQL Server 2000
SqlConnection dbConnection = dbconn.dbConnection;  //MessageBox.Show(dbConnection.State.ToString());
}
}

List field names of the database table,
SELECT [name] AS [Column name] FROM syscolumns WHERE id = (SELECT id FROM sysobjects WHERE type = ‘U’ AND [NAME] = ‘your table name’)

Auto Increment Column in PostGRESql
data type SERIAL

Insert Data into PostGre Table
string insertCommand = String.Format(sql_command);
NpgsqlCommand pgsqlcommand = new NpgsqlCommand(insertCommand, pgsqlConnection);
pgsqlcommand.ExecuteNonQuery();

http://dl.dropbox.com/u/1403404/C%23Projects/crud.rar

Display data into DataGrid
pgsql_conn_bl bl = new pgsql_conn_bl(); //pgsql_conn_bl is a class where connection and crud functions reside.
dataGridView1.DataSource=bl.GetAllRecords(“user_info”);
and in GetAllRecords(string table_name) function:
DataTable dtRecord = new DataTable();
NpgsqlConnection pgsqlConnection = new NpgsqlConnection(connString);//connection with postgre
pgsqlConnection.Open();//open connection
string selectCommand = “Select * from ” + table_name;
NpgsqlDataAdapter Adpt = new NpgsqlDataAdapter(selectCommand, pgsqlConnection);
Adpt.Fill(dtRecord);//Fill data grid.

Click here to download full project.

Now Connection:
PostGreSQL is an open source database which require additional files to connect with microsoft visual studio 2010 or 2008 (i am not sure about older versions).

1. Open a project in Visual Basic C# example name pgsql_conn
2. Download driver files from here. Extract into project root folder. i.e pgsql_conn\Npgsql2 (where de, es… etc folder and Mono.Security.dll, Npgsql.dll …etc files reside)
3. In solution explorer of visual studio 2010/2008 right click Reference->Add Reference. Browse Tab-> Select Npgsql2\Mono.Security.dll & Npgsql.dll
4. Mono.Security.dll & Npgsql.dll added in reference successfully.
5. Right click on project name (pgsql_conn) in solution explorer. -> Add-> Class -> enter file name pgsql_conn_bl.cs(or any).
6. Open pgsql_conn_bl.cs class and write code as show.
7. Now use this line of code pgsql_conn_bl x = new pgsql_conn_bl(); where you want to make connection with postgresql.

That’s all about connection.

Load/Show a Form

Form2 myForm = new Form2();
myform.show();
currentform.hide();

Change Startup Form
Open Program.cs
Application.Run(new Form2());

DateTimePicker Control
string student_date_of_birth = date_of_birth.Value.ToString(“yyyy-MM-dd”);
//output 2012/04/27

Connection with PostGreSQL

hastTable(simple) Example:
Link: http://pastebin.com/j6LTHmt1 (A complete example of create hastable, assign values, search by key, if not found then add that key into hastable, if found then increment value by 1)
Create Hashtable and Assign Values
Hashtable hashtable = new Hashtable();
hashtable.Add(“Blaze”, 400);
hashtable.Add(“Fiery”, 600);

Add New Key with Value
hashtable.Add(search_me, 1);

Traverse Hashtable values
foreach (int val in hashtable.Values) //hashtable.Keys
MessageBox.Show(val.ToString());

Increase value by 1
hashtable[search_me] = (int)hashtable[search_me] + 1;

hastTable Example with struct type:
struct structMultipleValues
{
public int TotalNoOfAccount;
public double TotalBalance;
//public double LastValue;
};
structMultipleValues hTblVal;
hTblVal.TotalNoOfAccount = 1;
hTblVal.TotalBalance = Convert.ToDouble(words[1]);
hashTable.Add(productCode.ToString(), hTblVal); //create an array element
//traverse hashtable.
foreach (DictionaryEntry gg in hashTable)
{
structMultipleValues tmp = (structMultipleValues)gg.Value;
gg.Key, tmp.TotalNoOfAccount, tmp.TotalBalance; //values
}

DataGridView Example:
//Read user_info Table and Assign value to DataGrid
SqlConnection myConnection = Program.dbConn;
using (SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter(“SELECT * FROM user_info”, myConnection))
{
// Use DataAdapter to fill DataTable
DataTable myDataTable = new DataTable();
mySqlDataAdapter.Fill(myDataTable);
// Render data onto the screen
dataGridView1.DataSource = myDataTable;
}

Read .htm file using C#
string story;
StreamReader corpusPage = new StreamReader(“jbgl_02-05-2012.htm”, Encoding.Default);
story = string.Empty;
string s = “”;
int total_line = 0;
while ((story = corpusPage.ReadLine()) != null)
{
total_line++;
s = s + story.ToString();
//MessageBox.Show(story.ToString());
if ((story == ” “) || (story == “”))
{
continue;
}
}
richTextBox1.Text = s;

Load Combo Box in C#

//Load product category combo box
combo_product_cat_id.DataSource = myDAL.GetRS(“select id, product_category_name from product_category”).Tables[0].DefaultView;
combo_product_cat_id.DisplayMember = “product_category_name”;
combo_product_cat_id.ValueMember = “id”;
combo_product_cat_id.DropDownStyle = ComboBoxStyle.DropDownList;

DataTable: Display Database Table Data using DataTable(DB: PostGreSql)

DataTable myDataTable = myDAL.GetRS(“select * from product_info where id=” + product_id).Tables[0];
DataView myDataView = myDataTable.DefaultView;
for (int j = 0; j < myDataView.Count; j++)
{
strTblData += (j+1)+” “+myDataView[j][0].ToString()+” (“+myDataView[j][1].ToString()+”) \n”;
}
label2.Text = “Table Name: product_info \n Total Data Rows Found: ” + total_row + “\n All Data:” + strTblData;

DataTable: Display Database Table Data using DataTable(DB: SQL Server 2000)
Program.db_connection_sql_server(); //Create Database Connection
SqlConnection myConnection = Program.dbConn;
String sqlSelectTbls = “select * from interest_provision”;
SqlCommand myCommand = new SqlCommand(sqlSelectTbls, myConnection);
SqlDataReader myReader = myCommand.ExecuteReader();
if (myReader.HasRows)
{
while (myReader.Read())
{
MessageBox(myReader["RecordCount"].ToString());
}
}

//in program.cs file
public static void db_connection_sql_server()
{
dbConn = new SqlConnection(“Data Source=ADMIN-ITSD;Initial Catalog=db_name;User ID=sa;Password=pass123;”);
dbConn.Open();    //MessageBox.Show(“Connection created.”);
}

Width: 1.8 inc
Height: 2 inc

Solution:
01. Find BranchID from Branch Table about this Branch

1. Windows XP/Windows 7
2. Office
3. Winrar
4. Dreamweaver, PHP Designer
5. Flash FXP
6. Wamp
7. Pidgin
8. Firefox
9. Firefox Extension (fission, Xmark)
10. Avro (bangla typing software)
11. Flash player
12. KM Player (video player)

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Add a java script file as: <script src=”js/custom_function.js”></script>
[Now the javascript File]
function show_hide(id, action) {
if (action==”hide”) {
document.getElementById(id).style.display = “none”;
} else {
document.getElementById(id).style.display = “block”;
}
}