c#.net+SQL2005 实现简单搜索

USE [DATABASE]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE function [dbo].[search]
(@Word nvarchar(max),
@Phrase nvarchar(max))
returns smallint
as
begin
if @Word is null or @Phrase is null return 0
DECLARE @BiggerWord VARCHAR(max)
SELECT @BiggerWord = @Word + 'x'
DECLARE @BiggerPhrase VARCHAR(max)
SELECT @BiggerPhrase = REPLACE (@Phrase, @Word, @BiggerWord)
RETURN LEN(@BiggerPhrase) - LEN(@Phrase)
END

USE [DATABASE]
GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATR PROCEDURE [dbo].[SearchDog]
(

@Word1 nVARCHAR(max)=null,
@Word2 nVARCHAR(max)=null,
@Word3 nVARCHAR(max)=null)
AS
DECLARE @Dog TABLE
(
DogHead nvarchar(max),
DogBody nVARCHAR(max),
Rank INT)

INSERT INTO @Dog
SELECT DogHead, DogBody,
3 * dbo.search(@Word1, DogHead) + dbo.search(@Word1, DogBody) +
3 * dbo.search(@Word2, DogHead) + dbo.search(@Word2, DogBody) +
3 * dbo.search(@Word3, DogHead) + dbo.search(@Word3, DogBody)
AS Rank
FROM Dog ORDER BY Rank DESC

SELECT DogHead, DogBody, Rank FROM @Dog
WHERE Rank > 0
ORDER BY Rank DESC

protected void Button1_Click(object sender, EventArgs e)
{
string MyConn = WebConfigurationManager.ConnectionStrings["Conn"].ConnectionString;
SqlConnection Myconnection = new SqlConnection(MyConn);

SqlCommand cmd = new SqlCommand("SearchDog", Myconnection);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("@Word1", SqlDbType.NVarChar, 50);
cmd.Parameters.Add("@Word2", SqlDbType.NVarChar, 50);
cmd.Parameters.Add("@Word3", SqlDbType.NVarChar, 50);
cmd.Parameters["@Word1"].Value = TextBox1.Text;
cmd.Parameters["@Word2"].Value = TextBox2.Text;
cmd.Parameters["@Word3"].Value = TextBox3.Text;
cmd.Connection.Open();
SqlDataAdapter adapter = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
Adapter.Fill(ds);
GridView1.DataSource = ds;
GridView1.DataBind();
cmd.Connection.Close();
}