DataSet C#

C# > System.Data   > DataSet

DataSet represents an in-memory cache of data.
DataSet consists of a collection of DataTable objects.

Example:

• Build and fill DataTable objects in a DataSet with data from a data source using a DataAdapter.
• LINQ to DataSet

SqlCommand C#

C# > Data > SqlCommand

SqlCommand is a Transact-SQL statement or stored procedure to execute against a SQL Server database.

• CommandTimeout
• SqlParameter

GridBoundColumn RadGrid Telerik

Telerik > RadGrid > GridBoundColumn

GridBoundColumn is bound to a field in a data source.

Properties

• AllowSorting

Example:

GridBoundColumn staticColumn = new GridBoundColumn();

staticColumn = new GridBoundColumn();
staticColumn.DataField = "Title";
staticColumn.HeaderText = "Title";
grd.Columns.Add(staticColumn);

DataTable C#

C# > System.Data   > DataTable

DataTable is a table in memory data.
When accessing DataTable objects in DataSet they are case sensitive.
We can display data from it  in controls such as DataGridView.

Properties:

Columns:         collection of columns
Rows:              collection of rows
DefaultView:   customized view of the table that may include a filtered view, or a cursor position.


Example:

   Create a new DataTable   

    System.Data.DataTable table = new DataTable("myTable");

Other examples:

• Add columns to DataTable
• Fill from DataBase
• Filter with LINQ
• Max value of column

System.Data namespace C#

C# > System.Data

System.Data namespace contains classes that represent ADO.NET architecture.
ADO.NET efficiently manages data from multiple data sources.

• DataTable
• SqlCommand
• DataSet
• OleDb
• SqlClient

Examples:

1. Populating DataSet and DataTable

Add Columns to DataTable C#

C# > DataTable  > Add  column

Using Columns collection we can add columns to DataTable in runtime.

Example:

DataTable dt = new DataTable("Product");

dt.Columns.Add("id",typeof(Int32));
dt.Columns.Add("name",typeof(string));

Oracle FOR LOOP

Oracle > FOR LOOP IN

The syntax for the FOR Loop In Oracle is:

FOR loop_counter IN [REVERSE] lowest_number..highest_number
LOOP
{.statements.}
END LOOP;

Example:

begin
  for i in 1..10 loop
    DBMS_OUTPUT.PUT_LINE (i);
   end loop ;
end ;
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