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Question: What is the importance of the Option statement?

Answer: The Option statement is used to prevent syntax and logical errors in code. The possible suffixes of this statement are:

* Option Explicit: Is the default abd is On. Option Explicit requires declaration of all variables before they are used.
* Option Compare: This can be set to Binary or Text and it specifies if stringsp are to be compared using binary or text comparison operations.
* Option Strict: The default is Off. An example: If value of one data type is assigned to another then Visual Basic will consider that as an error. If you want to assign a value of one Type to another then you should set it to On and use the conversion functions.

Example using the Option Statement.

The following code does not perform any special function but will show where to place an Option statement.

Option Strict Off
Imports System
Module Module 1
Sub Main ()
Console.WriteLine (?Using Option?)
End Sub
End Module



Category VB.NET Interview Questions & Answers - Exam Mode / Learning Mode
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Question: What is the importance of the Option statement?
Answer:

The Option statement is used to prevent syntax and logical errors in code. The possible suffixes of this statement are:

* Option Explicit: Is the default abd is On. Option Explicit requires declaration of all variables before they are used.
* Option Compare: This can be set to Binary or Text and it specifies if stringsp are to be compared using binary or text comparison operations.
* Option Strict: The default is Off. An example: If value of one data type is assigned to another then Visual Basic will consider that as an error. If you want to assign a value of one Type to another then you should set it to On and use the conversion functions.

Example using the Option Statement.

The following code does not perform any special function but will show where to place an Option statement.

Option Strict Off
Imports System
Module Module 1
Sub Main ()
Console.WriteLine (?Using Option?)
End Sub
End Module
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Sir my name is riyaz and my question is Object class in VB.net supports all classes in .net frameworks
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Public Sub BindListControl( ByVal Lst As Listbox, ByVal sql As String, ByVal TextField As String, Optional ByVal ValueFld As String = "")
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------------ --------- --------- --------- --------- --------- -
and Then i replaced function with Object
------------ --------- --------- --------- --------- --------- -

Public Sub BindListControl( ByVal Lst As Object, ByVal sql As String, ByVal TextField As String, Optional ByVal ValueFld As String = "")
Dim ds As New DataSet
Dim Ad As New SqlDataAdapter
Dim Cmd As New SqlCommand

Try
If cnn2.State = ConnectionState. Closed Then OpenConnection2( )

With Cmd
.Connection = cnn2
.CommandType = CommandType. Text
.CommandText = sql
End With
Ad = New SqlDataAdapter( Cmd)
Ad.Fill(ds, "tmp")
Lst.DataTextField = TextField
If ValueFld <> "" Then
Lst.DataValueField = ValueFld
End If
Lst.DataSource = ds
Lst.DataBind( )

Catch ex As Exception
Current.Response. Write(ex. Message)
Finally
ds.Dispose()
Ad.Dispose()
Cmd.Dispose( )
'cnn2.Close( )
End Try
End Sub
------------ --------- --------- --------- --------- --------- -
It will sucessfully work but if do it in c# as

public void BindListBox( ListBox Lst, string sqlquery, string TextField, string value)
{
//ListBox Lst;
//Lst = (ListBox)sender;
SqlConnection con = new SqlConnection( );
con.ConnectionStrin g = cnnstring;
con.Open();
if (con.State.ToString () == "Open")
{
SqlDataAdapter adapater = new SqlDataAdapter( sqlquery, con);
DataSet Ds = new DataSet();
SqlCommandBuilder cmd = new SqlCommandBuilder( adapater) ;
try
{

adapater.Fill( Ds, "temp");
Lst.DataTextField = TextField;
if (value != null)
{
Lst.DataValueField = value;
}
Lst.DataSource = Ds;
Lst.DataBind( );


}

catch (Exception ex)
{
Response.Write( ex.Message. ToString( ));
}
finally
{
con.Close();
adapater.Dispose( );
cmd.Dispose( );
}

}
else
{
Response.Write( "Connection Not Available");
}
}
--------------------------------------
It will work with ListBox control
-----------------------------------
if i replace ListBox with Object it will through Error that object does not contain defination for DataTextField, DataSource, DataBind( )
so sir it will work in vb.net why not in c# is any alternate way to do this or any other syntax
please send me response as earily as possible
Thank u sir
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