Import System.Data.DataTable in Visual Basic 2008 VS Using System.Data.DataTable in C# 2008

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In VB.Net a package called

VB

System.Data.DataTable

can be imported to a working form or to a class. But I tried this by doing C# like

Using System.Data.DataTable

gives me an error, saying "A using a namespace directive can only be applied to namespaces;'System.Data.DataTable is a type not a namespace'.

Then how am I able to use DataTable in C# 2008 ?

Please help me if you guys have some time.

Thank You!
Chiransj

Posted 21-Dec-12 21:31pm

Chiranthaka Sampath

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Wendelius · Accepted Answer · 2012-12-21T22:09:00

You cannot use a class with using which basically defines just a 'shortcut' to a namespace, like imports in VB.

Instead you define a variable which holds an instance of the class and assign an instance to it.

An example from MSDN[^]:

C#

private void MakeDataTableAndDisplay()
{
    // Create new DataTable.
    DataTable table = new DataTable();

    // Declare DataColumn and DataRow variables.
    DataColumn column;
    DataRow row;

    // Create new DataColumn, set DataType, ColumnName 
    // and add to DataTable.    
    column = new DataColumn();
    column.DataType = System.Type.GetType("System.Int32");
    column.ColumnName = "id";
    table.Columns.Add(column);

    // Create second column.
    column = new DataColumn();
    column.DataType = Type.GetType("System.String");
    column.ColumnName = "item";
    table.Columns.Add(column);

    // Create new DataRow objects and add to DataTable.     
    for(int i = 0; i < 10; i++)
    {
        row = table.NewRow();
        row["id"] = i;
        row["item"] = "item " + i;
        table.Rows.Add(row);
    }
    // Set to DataGrid.DataSource property to the table.
    dataGrid1.DataSource = table;
}

OriginalGriff · Accepted Answer · 2012-12-21T22:08:00

Solution 1

Replace it with

C#

using System.Data;

And the DataTable class will be avaialble:

C#

DataTable dt = new DataTable();

Posted 21-Dec-12 22:08pm

OriginalGriff

Comments

Chiranthaka Sampath 23-Dec-12 3:12am

Ok pal I will try that! Thanks anyway!