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。