How to implement content prompts in .net text boxes

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Create databases, tables (sqlserver2008 database I use)

The code is as follows:

CREATE TABLE Ceshi

(

Id VARCHAR (50) PRIMARY KEY NOT NULL

Cname VARCHAR (30)

)

GO

INSERT INTO Ceshi

SELECT NEWID (), 'jack1' UNION

SELECT NEWID (), 'jack2' UNION

SELECT NEWID (), 'jack3' UNION

SELECT NEWID (), 'jack4' UNION

SELECT NEWID (), 'jack5' UNION

SELECT NEWID (), 'peter1' UNION

SELECT NEWID (), 'peter2' UNION

SELECT NEWID (), 'peter3' UNION

SELECT NEWID (), 'peter4' UNION

SELECT NEWID (), 'peter5'

Go

Create a custom function

Create function [dbo]. [f_GetPy] (@ str nvarchar (4000))

Returns nvarchar (4000)

As

Begin

Declare @ strlen int,@re nvarchar 4000

Declare @ t table (chr nchar (1) collate Chinese_PRC_CI_AS,letter nchar (1))

Insert into @ t (chr,letter)

Select'A','A 'union all select' eight','B 'union all

Select 'ZAM','C 'union all select' union all select','D 'union all

Select 'hair','E 'union all select' hair','F 'union all

Select 'union all select','G 'hafnium','H 'union all

Select'no','J 'union all select' cut','K 'union all

Select 'union all select','L 'union all','M'

Select 'union all select','N 'Ooh','O 'union all

Select 'union all select','P 'seven','Q 'union all

Select 'union all select','R 'three','S 'union all

Select'he','T 'union all select' him','W 'union all

Select'Xi','X 'union all select' ya','Y 'union all

Select 'son','Z'

Select @ strlen=len (@ str), @ re='

While @ strlen > 0

Begin

Select top 1 @ re=letter+@re,@strlen=@strlen-1

From @ t a where chr