SqlServer 多条件查询 [存储过程] 经典例子结合C#的使用

表中的字段：

CREATE TABLE [dbo].[stuInfo] (

[FNumber] [int] IDENTITY(1,1) NOT NULL ,

[FName] [nvarchar] (30) COLLATE Chinese_PRC_CI_AS NOT NULL ,

[FNameen] [varchar] (35) COLLATE Chinese_PRC_CI_AS  ,

[FSex] [char] (1) COLLATE Chinese_PRC_CI_AS NOT NULL ,

[FEducation] [char] (1) COLLATE Chinese_PRC_CI_AS NOT NULL ,

[FCardID] [char] (18) COLLATE Chinese_PRC_CI_AS NOT NULL ,

[FBirDate] [datetime] NOT NULL ,

[FTech] [nvarchar](50) COLLATE Chinese_PRC_CI_AS ,

[FSubject] [nvarchar](50) COLLATE Chinese_PRC_CI_AS,

[FJiF] [nvarchar](100)COLLATE Chinese_PRC_CI_AS,

[FJobAdd][nvarchar](100)COLLATE Chinese_PRC_CI_AS,

[FExamNum][varchar](30)COLLATE Chinese_PRC_CI_AS NOT NULL,

[FServerNum] [varchar] (30) COLLATE Chinese_PRC_CI_AS NOT NULL ,

[FExamDate] [datetime] NOT NULL ,

[FIsAE] [char] (1) COLLATE Chinese_PRC_CI_AS NOT NULL 

) ON [PRIMARY]

GO

存储过程：

IF EXISTS(SELECT *FROM SYSOBJECTS WHERE NAME='PROC_Look')

DROP PROC  PROC_Look

GO

CREATE PROC PROC_Look



@FName  NVARCHAR(30)=NULL,

@FNameen VARCHAR(35)=NULL,

@FCardID CHAR(18)=NULL,

@FExamNum NVARCHAR(30)=NULL,

@FServerNum NVARCHAR(30)=NULL,

@FSex  CHAR(1)=NULL,

@FEducation CHAR(1)=NULL,

@FIsAE  CHAR(1)=NULL,

@FTech  NVARCHAR(50)=NULL,

@FSubject NVARCHAR(50)=NULL,

@FJiF  NVARCHAR(100)=NULL,

@FJobAdd NVARCHAR(100)=NULL,

@FStartTime DATETIME=NULL,

@FEndTime DATETIME=NULL



  

AS

declare @sqlStr varchar(100)

        

if @FName IS NOT NULL

begin

  set @sqlStr=' where FName='+''''+@FName+'''' 

end

        

if @FNameen IS NOT NULL

begin

    if @sqlStr IS NOT NULL

        set @sqlStr=@sqlStr+' and FNameen='+''''+@FNameen+'''' 

    else

  set @sqlStr=' where FNameen='+''''+@FNameen+''''

end

    

if @FCardID IS NOT NULL

begin

  if @sqlStr IS NOT NULL

  set @sqlStr=@sqlStr+' and FCardID='+''''+@FCardID+'''' 

  else

  set @sqlStr=' where FCardID='+''''+@FCardID+''''

end



if @FExamNum IS NOT NULL

begin

  if @sqlStr IS NOT NULL

  set @sqlStr=@sqlStr+' and FExamNum='+''''+@FExamNum+''''

  else

  set @sqlStr=' where FExamNum='+''''+@FExamNum +''''

end



if @FServerNum IS NOT NULL

begin

  if @sqlStr IS NOT NULL

  set @sqlStr=@sqlStr+' and FServerNum='+''''+@FServerNum+''''

  else

  set @sqlStr=' where FServerNum='+''''+@FServerNum+''''

end



if @FSex IS NOT NULL

begin

  if @sqlStr IS NOT NULL

  set @sqlStr=@sqlStr+' and FSex='+''''+@FSex+''''

  else

  set @sqlStr=' where FSex='+''''+@FSex+''''

end



if @FEducation IS NOT NULL

begin

  if @sqlStr IS NOT NULL

  set @sqlStr=@sqlStr+' and FEducation='+''''+@FEducation+''''

                        

                        

  else

  set @sqlStr=' where FEducation='+''''+@FEducation+''''

  

end 

if @FIsAE IS NOT NULL

begin

  if @sqlStr IS NOT NULL

  set @sqlStr=@sqlStr+' and FIsAE='+''''+@FIsAE+''''

                        

  else

  set @sqlStr=' where FIsAE='+''''+@FIsAE+''''

                        

end

if @FTech IS NOT NULL

begin

  if @sqlStr IS NOT NULL

  set @sqlStr=@sqlStr+' and FTech='+''''+@FTech+''''

  else

  set @sqlStr=' where FTech='+''''+@FTech+''''

end



if @FSubject IS NOT NULL

  begin

  if @sqlStr IS NOT NULL

    set @sqlStr=@sqlStr+' and FSubject='+''''+@FSubject+''''

  else

    set @sqlStr=' where FSubject='+''''+@FSubject +''''

  end

if @FJiF IS NOT NULL

begin

  if @sqlStr IS NOT NULL

  set @sqlStr=@sqlStr+' and FJiF='+''''+@FJiF+'''' 

  else

  set @sqlStr=' where FJiF='+''''+@FJiF+''''

end

if @FJobAdd IS NOT NULL

begin

  if @sqlStr IS NOT NULL

  set @sqlStr=@sqlStr+' and FJobAdd='+''''+@FJobAdd +''''

  else

  set @sqlStr=' where FJobAdd='+''''+@FJobAdd +''''

end

EXEC('select *from stuInfo '+ @sqlStr)

GO

可以在SQL SERVER查询分析器里，执行该存储过程并跟踪@sqlStr

EXEC PROC_LOOK Herbert

下面的代码演示如何在C#里面使用上面的存储过程

string source = "Server = (local); Database = Students; Integrated Security = SSPI";

            SqlConnection conn = new SqlConnection(source);

            conn.Open();



            SqlCommand cmd = new SqlCommand("PROC_Look", conn);

            cmd.CommandType = CommandType.StoredProcedure;

            cmd.Parameters.Add(new SqlParameter("@FName", SqlDbType.NVarChar, 30, "FName"));

            

            cmd.Parameters.Add(new SqlParameter("@FNameen", SqlDbType.NVarChar, 35, "FNameen"));

            cmd.Parameters.Add(new SqlParameter("@FCardID", SqlDbType.Char, 18, "FCardID"));

            cmd.Parameters.Add(new SqlParameter("@FExamNum", SqlDbType.NVarChar, 30, "FExamNum"));

            cmd.Parameters.Add(new SqlParameter("@FServerNum", SqlDbType.NVarChar, 30, "FServerNum"));

            cmd.Parameters.Add(new SqlParameter("@FSex", SqlDbType.Char, 1, "FSex"));

            cmd.Parameters.Add(new SqlParameter("@FEducation", SqlDbType.Char, 1, "FEducation"));

            cmd.Parameters.Add(new SqlParameter("@FIsAE", SqlDbType.Char, 1, "FIsAE"));

            cmd.Parameters.Add(new SqlParameter("@FTech", SqlDbType.NVarChar, 50, "FTech"));

            cmd.Parameters.Add(new SqlParameter("@FSubject", SqlDbType.NVarChar, 50, "FSubject"));

            cmd.Parameters.Add(new SqlParameter("@FJiF", SqlDbType.NVarChar, 100, "FJiF"));

            cmd.Parameters.Add(new SqlParameter("@FJobAdd", SqlDbType.NVarChar, 100, "FJobAdd"));

            cmd.Parameters.Add(new SqlParameter("@FStartTime", SqlDbType.DateTime, 0, "FStartTime"));

            cmd.Parameters.Add(new SqlParameter("@FEndTime", SqlDbType.DateTime, 0, "FEndTime"));



            cmd.Parameters["@FName"].Value = "Herbert";



            SqlDataReader rdr = cmd.ExecuteReader();

            BindingSource bs = new BindingSource();

            bs.DataSource = rdr;

            this.dataGridView1.DataSource = bs;

            conn.Close();  

这里在dataGridView1里面就可以显示返回结果了。