This article shows you how to enable cURL on XAMPP on Windows 7.

Step-by-step

1. Locate php.ini in xampp directory. By default, it locates in “xampp/php/php.ini”. Then, open the file with any text editor.
   
2. Uncomment the line below by remove the semi-colon at beginning of the line and save the file.

   ;extension=php_curl.dll

   to

   extension=php_curl.dll

   

3. Next, restart apache service. You can do this through Windows services or using XAMPP Control Panel. Open XAMPP Control Panel, click on Stop button of the Apache service. Once it stops, click Start button.
   
4. Now cURL is enabled on XAMPP, you can test by create a PHP file with the code below and save to htdocs folder.

    <?php
     phpinfo();
   ?>
   

   

5. Open the browser and navigate to http://localhost/phpinfo.php. Scroll down to find curl section, you will see that it is already enabled. If you can’t find curl section, it means that cURL isn’t enable on the server.
   

No related posts.

On this example, I will create a connection to “Northwind” database on this SQL Server “BKKSQL001\INSTANCE01” and query product name and units in stock from “Products” table. Then, I create a chart and bind the query’s result to the chart.

Step-by-step

1. Create a new Windows Application project on VB.NET and type name as “SampleDataBindChart“.
   
2. On Form1, open code window and import these libraries. The first two libraries are used for SQL. The last one is used for Chart.

   Imports System.Data
   Imports System.Data.SqlClient
    
   Imports System.Windows.Forms.DataVisualization.Charting

   

3. Type code below on Form1_Load().

   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

   Dim strConn As String = "Data Source=BKKSQL001\INSTANCE01;" & _ "Initial Catalog=Northwind;Integrated Security=True"   Dim conn As New SqlConnection(strConn)   Dim sqlProducts As String = "SELECT Top 8 ProductName, UnitsInStock FROM Products" Dim da As New SqlDataAdapter(sqlProducts, conn) Dim ds As New DataSet() da.Fill(ds, "Products")   Dim ChartArea1 As ChartArea = New ChartArea() Dim Legend1 As Legend = New Legend() Dim Series1 As Series = New Series() Dim Chart1 = New Chart() Me.Controls.Add(Chart1)   ChartArea1.Name = "ChartArea1" Chart1.ChartAreas.Add(ChartArea1) Legend1.Name = "Legend1" Chart1.Legends.Add(Legend1) Chart1.Location = New System.Drawing.Point(13, 13) Chart1.Name = "Chart1" Series1.ChartArea = "ChartArea1" Series1.Legend = "Legend1" Series1.Name = "Series1" Chart1.Series.Add(Series1) Chart1.Size = New System.Drawing.Size(800, 400) Chart1.TabIndex = 0 Chart1.Text = "Chart1"   Chart1.Series("Series1").XValueMember = "ProductName" Chart1.Series("Series1").YValueMembers = "UnitsInStock"   Chart1.DataSource = ds.Tables("Products")

   Code Explanation:

   • Line 1-2: Define a connection string to connect to a database on SQL Server.
     • Data Source is a SQL Server name.
     • Initial Catalog is a database name.
     • Set Integrated Security=True to use the current user as identity to access the SQL Server database.
   • Line 4: Create a SqlConnection’s object.
   • Line 6: Define SQL query string.
   • Line 7-9: Execute the query and populate result to DataSet’s object.
   • Line 11-14: Create Chart’s objects.
   • Line 15: Add Chart’s object to the form.
   • Line 17-29: Set Chart’s properties (ChartArea, Legend and Series).
   • Line 31-32: Bind column “ProductName” to X-axis and column “UnitsInStock” to Y-axis on the “Series1” Chart.
   • Line 34: Set Chart’s data source to the DataTable in the DataSet’s object.

   

4. Run the project. You see a chart displaying “Product Name” on X-axis and “Unit in Stock” on Y-axis which data is gathered from Northwind database on SQL Server.
   

Related posts:

1. Creating Graph with VB.NET, Part 1: Basic Chart This series shows how to create chart or graph with...
2. Creating Graph with VB.NET, Part 2: Customize Chart On Part 1: Basic Chart, I show how to create...

Sections

• Sample chart
• Change chart type
• Change color style
• Insert title to chart
• 3D chart

Sample chart

The sample chart that I use on this post has a series “Series1” which has 3 data points “10,20,30“.

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Change chart type

There are many chart types that you can select for Chart control. On this example, I show some of those chart types which are Point, Line, Bar, Pie.

1. On Chart Properties, click the Series collection. Then, click the ellipsis button.
   
2. On Series Collection Editor, select “Series1” in the Members area and change the Chart type property to Point.
   
3. The Point chart type.
   
4. The Line chart type.
   
5. The Bar chart type.
   
6. The Pie chart type.
   

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Change Color style of chart

There are many color palettes that you can choose for Chart control. This section shows how to change color of Chart control.

1. On Chart Properties, click on Palette property. You see a drop down button. Click on it and you can choose a color palette for your chart.
   
2. The example below is Bright color palette.
   

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Insert title to chart

This section shows how to insert title to Chart control.

1. On Chart Properties, click the Title collection. Then, click the ellipsis button.
   
2. On Title Collection Editor, click Add and set (Text) to “My Sample Chart” in the newly created Title object.
   
3. Run the project. You will see a title on top of the chart.
   
4. You can customize title’s text style, title position, title color on title properties.
   

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3D chart

This section shows how to use three-dimensional (3D) chart areas in Chart control.

1. On Chart Properties, click the ChartAreas collection. Then, click the ellipsis button.
   
2. On ChartArea Collection Editor, select “ChartArea1“. Expand Area3DStyle and change (Enable3D) to True.
   Note: You can customize your 3D Style on this Area3DStyle properties .
   
3. You see the chart is now 3D.
   

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Related posts:

1. Creating Graph with VB.NET, Part 1: Basic Chart This series shows how to create chart or graph with...
2. Creating Graph with VB.NET, Part 3: Data Binding Chart to Database From Part 1: Basic Chart and Part 2: Customize Chart,...

I divide the series into 3 parts:

1. Creating Graph with VB.NET, Part 1: Basic Chart
2. Creating Graph with VB.NET, Part 2: Customize Chart
3. Creating Graph with VB.NET, Part 3: Data Binding Chart to Database

On this post, you will learn how to create a basic chart on Windows Form Application with VB.NET. I use Microsoft Visual Studio 2005 as IDE.

Requirement

• Microsoft Visual Studio 2005 or later.
• .NET Framework 3.5 SP1 or later. You can download Microsoft .NET Framework 3.5 Service Pack 1 from Microsoft website.
• Microsoft Chart Controls for Microsoft .NET Framework 3.5

Step-by-step

1. Install the requirement software as stated on the Requirement section.
2. Open Microsoft Visual Studio 2005. Create a new VB.NET’s Windows Application. Type the name of the project as “SampleBasicChart“.
   
3. On Toolbox window, drag a Chart control from the Data category to the Windows Form.
   
   Note: If you does not see the Chart control in the Toolbox, you need to perform these steps below:
   • Right-click on the Toolbox window and select Choose Items.
     
   • On Choose Toolbox Items, click Browse.
     
   • Browse to the location where you have installed Microsoft Chart Controls. The default location is
     C:\Program Files\Microsoft Chart Controls\Assemblies and select System.Windows.Forms.DataVisualization.dll. Then, click Open.
     
   • You see Chart control has been added to .NET Framework Components. Verify that its check box is checked and click OK.
     
4. On Chart Properties, you see an empty chart with a default series, “Series1“. Next, I’m going to add another Series. On Chart Properties, click the Series collection. Then, click the ellipsis button.
   
5. On Series Collection Editor, click Add. You will see “Series2” has been added to the collection.
   
6. Now you have two series on a chart. But there is not any data on the chart so I will add some example data point on each series. Select Series1 and click the ellipsis button on Points collection.
7. On Series Collection Editor, select “Series1” in the Members area and click the Points collection property. Then, click the ellipsis button.
   
8. On DataPoint Collection Editor, click Add and assign a value “10” to the YValues property in the newly created DataPoint object.
   
9. Repeat step 8 to add two more DataPoint object with values “20” and “30” repectively. Then, click OK to close the DataPoint Collection Editor window.
   Note: These values are example values, you may use any value as you want.
10. Repeat step 7-9 again on “Series2” with YValues as you want. Then, click OK to close the Series Collection Editor windows.
11. Run the project. You see the chart with two series as you created.
    

Related posts:

1. Creating Graph with VB.NET, Part 2: Customize Chart On Part 1: Basic Chart, I show how to create...
2. Creating Graph with VB.NET, Part 3: Data Binding Chart to Database From Part 1: Basic Chart and Part 2: Customize Chart,...

• Connection: Provides a connection used to communicate with the data source.
• DataAdapter: A bridge used to transfer data between a Data source and a DataSet object.
• DataSet: Stores query result from DataAdapter.

On this post, you will see how to develop an ASP.NET web application that query data from SQL Server 2005 and display the result on a GridView object. I have provided both VB.NET and C# programming languages.

Step-by-step

1. Create a connection string in web.config. I decide to put the connection string in web.config so that I can re-use the connection string in other web form.

   <connectionstrings>
   		<add name="Northwind"
          connectionString="Data Source=BKKSQL001\INSTANCE01;
          Initial Catalog=Northwind;
          Integrated Security=True"
         providerName="System.Data.SqlClient"/>
   </connectionstrings>

   Attributes explanation:

   • name: A connection string name.
   • connectionString: A connection string which is used to connect to a database. On this example, it connects to Northwind database on BKKSQL001\INSTANCE01.
   • providerName: A provider name that is used.

   

2. On a Web Form, imports some namespaces which are required for working with SQL Server. System.Web.Configuration is use to read values from web.config.

   'Visual Basic
   Imports System.Data
   Imports System.Data.SqlClient
   Imports System.Web.Configuration

   //C#
   using System.Data;
   using System.Data.SqlClient;
   using System.Web.Configuration;

3. Use a GridView object to display the query result. Set the name of GridView to “gridView1“. Copy and paste the code below to Page_Load method.

   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

   'Visual Basic Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load   Dim connStr As String = WebConfigurationManager.ConnectionStrings("Northwind").ConnectionString Dim conn As New SqlConnection(connStr) conn.Open()   Dim sqlProducts As String = "SELECT ProductID, ProductName, UnitPrice FROM Products"   Dim da As New SqlDataAdapter(sqlProducts, conn) Dim ds As New DataSet() da.Fill(ds, "Products")   gridView1.DataSource = ds.Tables("Products") gridView1.Databind() End Sub

   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

   //C# protected void Page_Load(object sender, EventArgs e) { string connStr = WebConfigurationManager.ConnectionStrings["Northwind"].ConnectionString; SqlConnection conn = new SqlConnection(connStr); conn.Open();   string sqlProducts = "SELECT ProductID, ProductName, UnitPrice FROM Products";   SqlDataAdapter da = new SqlDataAdapter(sqlProducts, conn); DataSet ds = new DataSet(); da.Fill(ds, "Products");   gridView1.DataSource = ds.Tables["Products"]; gridView1.DataBind(); }

   Code Explanation:

   • Line 4-6: Get a connection string value from web.config. Then, open a connection using the connection string to a SQL Server.
   • Line 8: Create a variable “sqlProducts” which stores SQL query from Products table.
   • Line 10-12: Create a SqlDataAdapter object “da” to execute the query. Then, create a DataSet object “ds” to hold the result from object “da” and set name to “Products“.
   • Line 14-15: Display data from object “ds” on a GridView object “gridView1“.
4. Run the project. You will see the result as figure below.
   

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1. Accessing SQL Server on ASP.NET Web Application using SqlDataSource Web Control, Part 1: SELECT Data Accessing SQL Server on ASP.NET Web Application using SqlDataSource Web...
2. Accessing SQL Server on ASP.NET Web Application using SqlDataSource Web Control, Part 2: UPDATE Data Accessing SQL Server on ASP.NET Web Application using SqlDataSource Web...
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From part 1: SELECT Data, you see how to query data from SQL Server 2005 to display on a GridView object using SqlDataSource web control. But the data is read-only, you cannot modify any data on a GridView. So now you will see how to modify data on the GridView which will update back on the database.

Step-by-step

Note: This example is continue from part 1: SELECT Data.

1. On SqlDataSource1, click on Configure Data Source.
   
2. On Choose Your Data Connection, click Next.
   
3. On Configure Select Statement, change the option from Specify columns from a table or view to Specify a custom SQL statement or stored procedure. Click Next.
   
4. On Define Custom Statements or Stored Procedures, you see 4 tabs which are SELECT, UPDATE, INSERT and DELETE. Here you can define custom SQL statements for each SQL operations. On SELECT tab, enter the SQL statement as below:

   SELECT [ProductID], [ProductName], [UnitPrice] FROM [Products]

   

5. Click on UPDATE tab, enter the SQL statement below and click Next.

   UPDATE Products SET ProductName = @ProductName, UnitPrice = @UnitPrice
   WHERE [ProductID] = @ProductID

   

6. On Test Query, Click Finish.
   
7. On GridView1, click Edit Columns.
   
8. On Fields, select Command Fields -> Edit, Update, Cancel on Available fields and click Add. Then, move the field Edit, Update, Cancel to the top by click on up arrow button. Next, click OK.
   
9. On GridView1, check Enable Editing to allow edit data on the Grid View.
   
10. Build and run the project. You see the Edit column in front of each row. Click Edit to edit the row.
    
11. You can modify the value of product name and unit price of the row which also update back on the database, too.
    

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1. Accessing SQL Server on ASP.NET Web Application using SqlDataSource Web Control, Part 1: SELECT Data Accessing SQL Server on ASP.NET Web Application using SqlDataSource Web...
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On this post, you will see how to develop an ASP.NET web application that query data from SQL Server 2005 and display the result on a GridView object using SqlDataSource web control so you don’t have to write any code!

Step-by-step-

1. Drag a SqlDataSource object from Toolbox to a Web Form.
   
2. On SqlDataSource1 object, click Configure Data Source.
   
3. On Choose Your Data Connection, click New Connection.
   
4. On Add Connection, select Data Source as Microsoft SQL Server (SqlClient). Then, type the Server name of the SQL Server and select a database. On this example, the server is BKKSQL001\INSTANCE01 and Northwind is the database.
   
5. On Save the Connection String to the Application Configuration File, click Next to continue.
   
6. On Configure the Select Statement, select Specify columns from table or view and select Products table. Then, check ProductID, ProductName and UnitPrice columns. Click Next.
   
7. On Test Query, you can click on Test Query button to verify the query result. Then, click Finish.
   
8. Drag a GridView object from Toolbox to the Web Form. Then, choose the Data Source to the one that you have just created.
   
9. Build and run the project. You will see the result as the figure below.
   

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1. Accessing SQL Server on ASP.NET Web Application using SqlDataSource Web Control, Part 2: UPDATE Data Accessing SQL Server on ASP.NET Web Application using SqlDataSource Web...
2. Accessing SQL Server on ASP.NET Web Application using ADO.NET ADO.NET is a set of components that can be used...
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Perform SQL Operations

From Part 3: Create a Connection, I show how to create a connection from NetBeans 6.5 to the Northwind database of Microsoft Access 2007. On this post, you see how to perform basic SQL operations such as SELECT, INSERT, DELETE and UPDATE to the Customers table on Northwind database.

• Retrieve data from database
• Update data on database

Retrieve data from database

Copy and paste the code below on main method between these lines:

System.out.println("Connected!");

and

con.close();

The Code

1
2
3
4
5
6
7
8
9
10
11
12

            Statement stmt = null;
            ResultSet rs = null;
 
            // SQL query command
            String SQL = "SELECT * FROM Customers";
            stmt = con.createStatement();
            rs = stmt.executeQuery(SQL);
            while (rs.next()) {
                System.out.println(rs.getString("Company") + " : "
                        + rs.getString("First Name")+ " : "
                        + rs.getString("Last Name"));
            }

Code Explanation:

• Line 1-2: Declare some variables.
• Line 5: Define SQL query string.
• Line 6: Create a statement object for sending SQL statements to the database.
• Line 7: Executes the SQL statement and returns a single ResultSet object.
• Line 8-12: Iterative in the ResultSet object to show results on output window

Next, run the project. You see the result on the output window. It displays records from Customers table.

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Update data on database

To insert, update and delete records on MS Access 2007 databases, you can re-use the code from the previous section. But you need to replace the SQL statement and code on this line:

rs = stmt.executeQuery(SQL);
while (rs.next()) {
                System.out.println(rs.getString("Company") + " : "
                        + rs.getString("First Name")+ " : "
                        + rs.getString("Last Name"));
            }

to

int rowsEffected = stmt.executeUpdate(SQL);
System.out.println(rowsEffected + " rows effected");

Code Explanation:
Executes the given SQL statement which may be INSERT, UPDATE or DELETE statement and returns the row count for the update.

INSERT command

            // SQL INSERT command
            String SQL = "INSERT INTO Customers (Company,[First Name]," +
                    "[Last Name]) VALUES ('MyCompany','Linglom','My Last Name')";
            int rowsEffected = stmt.executeUpdate(SQL);
            System.out.println(rowsEffected + " rows effected");

UPDATE command

            // SQL UPDATE command
            String SQL = "UPDATE Customers SET [Last Name] = 'New Last Name'" +
                            "WHERE [First Name] = 'Linglom'";
            int rowsEffected = stmt.executeUpdate(SQL);
            System.out.println(rowsEffected + " rows effected");

DELETE command

            // SQL DELETE command
            String SQL = "DELETE FROM Customers WHERE [First Name] = 'Linglom'";
            int rowsEffected = stmt.executeUpdate(SQL);
            System.out.println(rowsEffected + " rows effected");

Summary

You can download the source code of this series at SampleAccess2007.java. The example code will create a connection to Northwind database on Microsoft Access 2007. Then, retrieve records, insert a new record, update and delete the record from Customer table. Here is output of the example code.

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Create a Connection

From Part 2: Prepare Sample Database, I show how to setup Northwind database for Microsoft Access 2007. Now let’s start programming. On this post, you see how to create a connection from NetBeans 6.5 to the Northwind database of Microsoft Access 2007 which located at “c:\database\Northwind 2007.accdb”.

Step-by-step

1. Create a new Java Application project on NetBeans. Open NetBeans 6.5.1 and select File -> New Project.
   
2. On New Project, select Java -> Java Application. Click Next.
   
3. On New Java Application, type the project name “NorthwindSample” and click Finish.
   
4. The project “NorthwindSample” is created.
   
5. Let’s begin the programming part. First, I need to import some libraries.

   import java.sql.*;

   

6. Type the code below to the main method.

   1 2 3 4 5 6 7 8 9 10 11 12 13

   try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String url = "jdbc:odbc:Driver={Microsoft Access Driver " + "(*.mdb, *.accdb)};DBQ=C:\\Database\\Northwind 2007.accdb"; Connection con = DriverManager.getConnection(url); System.out.println("Connected!"); con.close(); } catch (SQLException e) { System.out.println("SQL Exception: "+ e.toString()); } catch (ClassNotFoundException cE) { System.out.println("Class Not Found Exception: "+ cE.toString()); }

   Code Explanation:

   • Line 2: Class.forName(“sun.jdbc.odbc.JdbcOdbcDriver”); means load the JDBC-ODBC driver.
   • Line 3-4: String url = “jdbc:odbc:Driver={Microsoft Access Driver ” + “(*.mdb, *.accdb)};DBQ=C:\\Database\\Northwind 2007.accdb”; declare a variable which store a string of the driver name for Microsoft Access 2007 and the location of the Northwind database.
   • Line 5: Make a connection using information on the variable which was created before.
   • Line 6: Display “Connected!” on console window.
   • Line 7: Close the connection.

   

7. Compile and run the project. You see the text “Connected!” on the output window. Otherwise, you should see an exception message.
   

What’s Next?

Now you have connected to the Northwind database of Microsoft Access 2007. Next, I will show how to perform some basic SQL operations such as SELECT, INSERT, UPDATE and DELETE to the Northwind database. See Part 4: Perform SQL Operations.

Related posts:

1. Accessing MS Access 2007 on NetBeans 6.5 using JDBC, Part 1: Introduction Introduction Here comes again, a tutorial about accessing database on...
2. Accessing MS Access 2007 on NetBeans 6.5 using JDBC, Part 2: Prepare Sample Database This article is one of the series of Accessing MS...
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Prepare Sample Database

On this post, I show how to prepare a sample database for Microsoft Access 2007, the “Northwind” database.

Step-by-step

1. Open Microsoft Access 2007, click on Local Templates. If you have Northwind 2007 on Local Templates, click on it and skip to step 4. Otherwise, follow the next step to download one.
   
2. Download Northwind template for Access 2007 from Microsoft – Northwind 2007.
   
3. Extract the downloaded file, 01228997.cab. Then, double-click on 01228997.accdt. Microsoft Office Access 2007 will start.
   
4. On Microsoft Access, choose the destination to create a sample Northwind 2007. On this example, I choose “c:\database\Northwind 2007.accdb”. Then, click Create.
   
5. Now the sample Northwind database is created. Click on Navigation Pane on the left side menu.
   
6. On Navigation Pane, click on Supporting Objects and double-click on Customers. You see data in the Customers table.
   
7. You also see the sample database file on c:\database\Northwind 2007.accdb which was created on step 4. I will use this path in the later part.
   

What’s Next?

Now you have a sample database, Northwind. Next, I will show how to write code to create a connection from NetBeans 6.5 to the Northwind database. See Part 3: Create a Connection.

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1. Accessing MS Access 2007 on NetBeans 6.5 using JDBC, Part 1: Introduction Introduction Here comes again, a tutorial about accessing database on...
2. Accessing MS Access 2007 on NetBeans 6.5 using JDBC, Part 3: Create a Connection This article is one of the series of Accessing MS...
3. Accessing MS Access 2007 on NetBeans 6.5 using JDBC, Part 4: Perform SQL Operations This article is one of the series of Accessing Access...