Quick Fix

1. How to disallow calendar of date picker control to select previous dates?

Set Start Date property of calendar extender to To Date on page load.


2. How to make text box of date picker control readonly? 

Add following code on page load..

txtVisitDate.Attributes.Add("readonly", "readonly");

3. How to show Indian rupees symbol in reports?

Set culture info to "en-IN" by overriding the InitializeCulture() like..

protected override void InitializeCulture()
{

   CultureInfo ci = new CultureInfo("en-IN");
    
   Thread.CurrentThread.CurrentCulture =

   Thread.CurrentThread.CurrentUICulture = ci;

   base.InitializeCulture();
}



and add DataFormatString in bounded field.

<asp:BoundField DataField="SalesAmount" DataFormatString="{0:C}" />

4. How to Update first 100 records of a table of MS SQL Server

UPDATE TOP (100) TABLE1
SET FIELD1 = VALUE1