我需要为使用C＃和SQL Server的网站实现高级搜索。这是基本的想法：
我有所需的搜索条件，但我无法弄清楚如何执行可选标准。问题在于用户可以在复选框列表中选择多个条件，并且所有这些项目都需要匹配。我还需要实现分页和排序（我已经工作），但这意味着搜索需要在SQL中进行。
有没有人之前做过这样的事情并且有最好的方法可以做到这一点？
答案 0 :(得分：0)
动态构建SQL，如下所示：
Private Sub LoadData()
'Initialize first
grdResults.DataSource = Nothing
grdResults.DataBind()
grdResults.Visible = False
grdResultsRequestedBy.DataSource = Nothing
grdResultsRequestedBy.DataBind()
grdResultsRequestedBy.Visible = False
grdResultsCallDate.DataSource = Nothing
grdResultsCallDate.DataBind()
grdResultsCallDate.Visible = False
btnExportToExcel.Visible = False
lblNoneFound.Visible = True
' We have to include null values when no value for a given field is provided.
' The like search "%" does not return rows with null values!!
Dim strShiftType As String
If (ddlShiftType.SelectedValue = "<- All ->") Then
strShiftType = ""
Else
strShiftType = " and sr.Shift_Type_ID = " & "'" & ddlShiftType.SelectedValue & "' "
End If
' Only allow good dates
' If one of Start or End is populated the other one will get the same value assigned.
' This avoids unnecessary entry if you deal with a range of one day only!
If txtShiftDateRangeStart.Text <> "" And txtShiftDateRangeEnd.Text = "" Then
txtShiftDateRangeEnd.Text = txtShiftDateRangeStart.Text
End If
If txtShiftDateRangeStart.Text = "" And txtShiftDateRangeEnd.Text <> "" Then
txtShiftDateRangeStart.Text = txtShiftDateRangeEnd.Text
End If
Dim strShiftDate As String
If txtShiftDateRangeStart.Text <> "" And txtShiftDateRangeEnd.Text <> "" And IsDate(txtShiftDateRangeStart.Text) And IsDate(txtShiftDateRangeEnd.Text) Then
strShiftDate = " and (sr.shift_date between " & "'" & txtShiftDateRangeStart.Text & "' and '" & txtShiftDateRangeEnd.Text & "')"
Else
strShiftDate = ""
txtShiftDateRangeStart.Text = ""
txtShiftDateRangeEnd.Text = ""
End If
Dim strRequestedBy As String
If (ddlRequestedBy.SelectedValue = "<- All ->") Then
strRequestedBy = ""
Else
strRequestedBy = " and bi.Requested_By = " & "'" & ddlRequestedBy.SelectedValue & "' "
End If
Dim txtCallNumberlike As String
If (txtCallNumber.Text & "%" = "%") Then
txtCallNumberlike = ""
Else
txtCallNumberlike = " and (bi.Call_Number LIKE @CallNumber) "
End If
' Only allow good dates
' If one of Start or End is populated the other one will get the same value assigned.
' This avoids unnecessary entry if you deal with a range of one day only!
If txtCallDateRangeStart.Text <> "" And txtCallDateRangeEnd.Text = "" Then
txtCallDateRangeEnd.Text = txtCallDateRangeStart.Text
End If
If txtCallDateRangeStart.Text = "" And txtCallDateRangeEnd.Text <> "" Then
txtCallDateRangeStart.Text = txtCallDateRangeEnd.Text
End If
Dim strCallDate As String
If txtCallDateRangeStart.Text <> "" And txtCallDateRangeEnd.Text <> "" And IsDate(txtCallDateRangeStart.Text) And IsDate(txtCallDateRangeEnd.Text) Then
strCallDate = " and (cast(bi.Call_date as datetime) between " & "'" & txtCallDateRangeStart.Text & "' and '" & txtCallDateRangeEnd.Text & "')"
Else
strCallDate = ""
txtCallDateRangeStart.Text = ""
txtCallDateRangeEnd.Text = ""
End If
Dim strDispatcher As String
If (ddlDispatcher.SelectedValue = "<- All ->") Then
strDispatcher = ""
Else
strDispatcher = " and bi.Dispatcher_ID = " & "'" & ddlDispatcher.SelectedValue & "' "
End If
Dim strEmployeeCompletingBillingInquiry As String
If (ddlEmployeeCompletingBillingInquiry.SelectedValue = "<- All ->") Then
strEmployeeCompletingBillingInquiry = ""
Else
strEmployeeCompletingBillingInquiry = " and bi.Employee_Completing_Billing_Inquiry_ID = " & "'" & ddlEmployeeCompletingBillingInquiry.SelectedValue & "' "
End If
' Only allow good dates
Dim strWhenCreated As String
' If one of Start or End is populated the other one will get the same value assigned.
' This avoids unnecessary entry if you deal with a range of one day only!
If txtWhenCreatedRangeStart.Text <> "" And txtWhenCreatedRangeEnd.Text = "" Then
txtWhenCreatedRangeEnd.Text = txtWhenCreatedRangeStart.Text
End If
If txtWhenCreatedRangeStart.Text = "" And txtWhenCreatedRangeEnd.Text <> "" Then
txtWhenCreatedRangeStart.Text = txtWhenCreatedRangeEnd.Text
End If
If txtWhenCreatedRangeStart.Text <> "" And txtWhenCreatedRangeEnd.Text <> "" And IsDate(txtWhenCreatedRangeStart.Text) And IsDate(txtWhenCreatedRangeEnd.Text) Then
strWhenCreated = " and (cast(convert(char(10), bi.When_Created, 101) as datetime) between " & "'" & txtWhenCreatedRangeStart.Text & "' and '" & txtWhenCreatedRangeEnd.Text & "')"
Else
strWhenCreated = ""
txtWhenCreatedRangeStart.Text = ""
txtWhenCreatedRangeEnd.Text = ""
End If
Dim strWhoCreated As String
If (ddlWhoCreated.SelectedValue = "<- All ->") Then
strWhoCreated = ""
Else
strWhoCreated = " and bi.Who_Created = " & "'" & ddlWhoCreated.SelectedValue & "' "
End If
' Only allow good dates
' If one of Start or End is populated the other one will get the same value assigned.
' This avoids unnecessary entry if you deal with a range of one day only!
If txtWhenUpdatedRangeStart.Text <> "" And txtWhenUpdatedRangeEnd.Text = "" Then
txtWhenUpdatedRangeEnd.Text = txtWhenUpdatedRangeStart.Text
End If
If txtWhenUpdatedRangeStart.Text = "" And txtWhenUpdatedRangeEnd.Text <> "" Then
txtWhenUpdatedRangeStart.Text = txtWhenUpdatedRangeEnd.Text
End If
Dim strWhenUpdated As String
If txtWhenUpdatedRangeStart.Text <> "" And txtWhenUpdatedRangeEnd.Text <> "" And IsDate(txtWhenUpdatedRangeStart.Text) And IsDate(txtWhenUpdatedRangeEnd.Text) Then
strWhenUpdated = " and (cast(convert(char(10), bi.When_Updated, 101) as datetime) between " & "'" & txtWhenUpdatedRangeStart.Text & "' and '" & txtWhenUpdatedRangeEnd.Text & "')"
Else
strWhenUpdated = ""
txtWhenUpdatedRangeStart.Text = ""
txtWhenUpdatedRangeEnd.Text = ""
End If
Dim strWhoUpdated As String
If (ddlWhoUpdated.SelectedValue = "<- All ->") Then
strWhoUpdated = ""
Else
strWhoUpdated = " and bi.Who_Updated = " & "'" & ddlWhoUpdated.SelectedValue & "' "
End If
Dim strIsDeleted As String
If (ddlIsDeleted.SelectedValue = "<- All ->") Then
strIsDeleted = ""
Else
If ddlIsDeleted.SelectedValue = "False" Then
strIsDeleted = " and (bi.IsDeleted = 'F' or bi.IsDeleted is null)"
Else
strIsDeleted = " and bi.IsDeleted = 'T'"
End If
End If
' Only allow good dates
' If one of Start or End is populated the other one will get the same value assigned.
' This avoids unnecessary entry if you deal with a range of one day only!
If txtWhenDeletedRangeStart.Text <> "" And txtWhenDeletedRangeEnd.Text = "" Then
txtWhenDeletedRangeEnd.Text = txtWhenDeletedRangeStart.Text
End If
If txtWhenDeletedRangeStart.Text = "" And txtWhenDeletedRangeEnd.Text <> "" Then
txtWhenDeletedRangeStart.Text = txtWhenDeletedRangeEnd.Text
End If
Dim strWhenDeleted As String
If txtWhenDeletedRangeStart.Text <> "" And txtWhenDeletedRangeEnd.Text <> "" And IsDate(txtWhenDeletedRangeStart.Text) And IsDate(txtWhenDeletedRangeEnd.Text) Then
strWhenDeleted = " and (cast(convert(char(10), bi.When_Deleted, 101) as datetime) between " & "'" & txtWhenDeletedRangeStart.Text & "' and '" & txtWhenDeletedRangeEnd.Text & "')"
Else
strWhenDeleted = ""
txtWhenDeletedRangeStart.Text = ""
txtWhenDeletedRangeEnd.Text = ""
End If
Dim strWhoDeleted As String
If (ddlWhoDeleted.SelectedValue = "<- All ->") Then
strWhoDeleted = ""
Else
strWhoDeleted = " and bi.Who_Deleted = " & "'" & ddlWhoDeleted.SelectedValue & "' "
End If
Dim Parameters_Group_In As String
Dim Parameters_Effective_Date_In As String
Parameters_Group_In = "REQUESTEDBY"
Parameters_Effective_Date_In = Now()
Dim SelectString As String = ""
Dim Error_Message As String = ""
Error_Message = BuildSelectString(SelectString)
Dim strCommand As String = ""
If ViewState("Submit") = "Submit" Then
strCommand += " select " & SelectString
strCommand += " from "
strCommand += " ( "
strCommand += " select convert(Char(10), sr.shift_date, 101) as ShiftDate, "
strCommand += " case when st.Shift_Desc is null then '' else st.Shift_Desc end + ' / ' + case when st.Shift_Start_Time is null then '' else st.Shift_Start_Time end + ' / ' + case when st.Shift_End_Time is null then '' else st.Shift_End_Time end + ' / ' + cast(st.Shift_Type_ID as varchar) as ShiftType, "
strCommand += " ParamRequestedBy.ParamRequestedByDesc as RequestedBy, "
strCommand += " bi.Call_Number as CallNumber, "
strCommand += " convert(Char(10), bi.Call_Date, 101) as CallDate, "
strCommand += " case when dispatcher.Last_Name is null then '' else dispatcher.Last_Name end + ', ' + case when dispatcher.First_Name is null then '' else dispatcher.First_Name end + ' / ' + cast(dispatcher.Employee_ID as varchar) as Dispatcher, "
strCommand += " (Select case when Employee.Last_Name is null then '' else Employee.Last_Name end + ', ' + case when Employee.First_Name is null then '' else Employee.First_Name end + ' / ' + cast(Employee.Employee_ID as varchar) from Employee where Employee.Employee_ID = bi.Dispatcher2_ID) as Dispatcher2, "
strCommand += " (Select case when Employee.Last_Name is null then '' else Employee.Last_Name end + ', ' + case when Employee.First_Name is null then '' else Employee.First_Name end + ' / ' + cast(Employee.Employee_ID as varchar) from Employee where Employee.Employee_ID = bi.Dispatcher3_ID) as Dispatcher3, "
strCommand += " bi.comments as Comments, "
strCommand += " case when completing.Last_Name is null then '' else completing.Last_Name end + ', ' + case when completing.First_Name is null then '' else completing.First_Name end + ' / ' + cast(completing.Employee_ID as varchar) as EmployeeCompletingBillingInquiry, "
strCommand += " bi.When_Created as WhenCreated, "
strCommand += " case when Who_Created.Last_Name is null then '' else Who_Created.Last_Name end + ', ' + case when Who_Created.First_Name is null then '' else Who_Created.First_Name end + ' / ' + cast(Who_Created.Employee_ID as varchar) as WhoCreated, "
strCommand += " bi.When_Updated as WhenUpdated, "
strCommand += " case when Who_Updated.Last_Name is null then '' else Who_Updated.Last_Name end + ', ' + case when Who_Updated.First_Name is null then '' else Who_Updated.First_Name end + ' / ' + cast(Who_Updated.Employee_ID as varchar) as WhoUpdated, "
strCommand += " case when bi.IsDeleted = 'F' or bi.IsDeleted is null then 'False' else 'True' end as IsDeleted, "
strCommand += " bi.When_Deleted as WhenDeleted, "
strCommand += " case when Who_Deleted.Last_Name is null then '' else Who_Deleted.Last_Name end + ', ' + case when Who_Deleted.First_Name is null then '' else Who_Deleted.First_Name end + ' / ' + cast(Who_Deleted.Employee_ID as varchar) as WhoDeleted "
strCommand += " from billing_inquiries bi "
strCommand += " inner join Shift_Report sr on bi.Shift_Report_ID = sr.Shift_Report_ID "
strCommand += " inner join Shift_Types st on sr.Shift_Type_ID = st.Shift_Type_ID "
strCommand += " inner join Employee dispatcher on bi.Dispatcher_ID = dispatcher.employee_id "
strCommand += " inner join Employee completing on bi.Employee_Completing_Billing_Inquiry_ID = completing.employee_id "
strCommand += " left outer join Employee Who_Created on bi.Who_Created = Who_Created.Employee_ID "
strCommand += " left outer join Employee Who_Updated on bi.Who_Updated = Who_Updated.Employee_ID "
strCommand += " left outer join Employee Who_Deleted on bi.Who_Deleted = Who_Deleted.Employee_ID "
strCommand += " inner join ( "
strCommand += " select Parameters_ID as ParamRequestedByID, Parameters_Value as ParamRequestedByDesc "
strCommand += " from Parameters_Details pd1, Parameters_Header ph "
strCommand += " where ph.parameters_group = pd1.parameters_group "
strCommand += " And pd1.parameters_group = @Parameters_Group "
strCommand += " And pd1.parameters_effective_date = "
strCommand += " (select max(pd2.parameters_effective_date) "
strCommand += " from parameters_details pd2 "
strCommand += " where pd2.parameters_group = pd1.parameters_group "
strCommand += " and pd2.parameters_id = pd1.parameters_id "
strCommand += " and pd2.parameters_effective_date <= @Parameters_Effective_Date) "
strCommand += " ) ParamRequestedBy on bi.Requested_By = ParamRequestedBy.ParamRequestedByID "
strCommand += " where 1=1 "
strCommand += strShiftType
strCommand += strShiftDate
strCommand += strRequestedBy
strCommand += txtCallNumberlike
strCommand += strCallDate
strCommand += strDispatcher
strCommand += strEmployeeCompletingBillingInquiry
strCommand += strWhenCreated
strCommand += strWhoCreated
strCommand += strWhenUpdated
strCommand += strWhoUpdated
strCommand += strIsDeleted
strCommand += strWhenDeleted
strCommand += strWhoDeleted
strCommand += " ) as Details "
End If
If ViewState("Submit") = "SubmitRequestedBy" Then
strCommand += "select ParamRequestedBy.ParamRequestedByDesc as RequestedBy, "
strCommand += " count(*) as Count "
strCommand += " from billing_inquiries bi "
strCommand += " inner join Shift_Report sr on bi.Shift_Report_ID = sr.Shift_Report_ID "
strCommand += " inner join Shift_Types st on sr.Shift_Type_ID = st.Shift_Type_ID "
strCommand += " inner join Employee dispatcher on bi.Dispatcher_ID = dispatcher.employee_id "
strCommand += " inner join Employee completing on bi.Employee_Completing_Billing_Inquiry_ID = completing.employee_id "
strCommand += " left outer join Employee Who_Created on bi.Who_Created = Who_Created.Employee_ID "
strCommand += " left outer join Employee Who_Updated on bi.Who_Updated = Who_Updated.Employee_ID "
strCommand += " left outer join Employee Who_Deleted on bi.Who_Deleted = Who_Deleted.Employee_ID "
strCommand += " inner join ( "
strCommand += " select Parameters_ID as ParamRequestedByID, Parameters_Value as ParamRequestedByDesc "
strCommand += " from Parameters_Details pd1, Parameters_Header ph "
strCommand += " where ph.parameters_group = pd1.parameters_group "
strCommand += " And pd1.parameters_group = @Parameters_Group "
strCommand += " And pd1.parameters_effective_date = "
strCommand += " (select max(pd2.parameters_effective_date) "
strCommand += " from parameters_details pd2 "
strCommand += " where pd2.parameters_group = pd1.parameters_group "
strCommand += " and pd2.parameters_id = pd1.parameters_id "
strCommand += " and pd2.parameters_effective_date <= @Parameters_Effective_Date) "
strCommand += " ) ParamRequestedBy on bi.Requested_By = ParamRequestedBy.ParamRequestedByID "
strCommand += " where 1=1 "
strCommand += strShiftType
strCommand += strShiftDate
strCommand += strRequestedBy
strCommand += txtCallNumberlike
strCommand += strCallDate
strCommand += strDispatcher
strCommand += strEmployeeCompletingBillingInquiry
strCommand += strWhenCreated
strCommand += strWhoCreated
strCommand += strWhenUpdated
strCommand += strWhoUpdated
strCommand += strIsDeleted
strCommand += strWhenDeleted
strCommand += strWhoDeleted
strCommand += " group by ParamRequestedBy.ParamRequestedByDesc "
strCommand += " order by ParamRequestedBy.ParamRequestedByDesc "
End If
If ViewState("Submit") = "SubmitCallDate" Then
strCommand += "select DATENAME(year, Call_Date) + ' ' + case when len(cast(month(Call_Date) as varchar)) = 1 then '0' + cast(month(Call_Date) as varchar) else cast(month(Call_Date) as varchar) end as YearMonth, "
strCommand += " count(*) as Count "
strCommand += " from billing_inquiries bi "
strCommand += " inner join Shift_Report sr on bi.Shift_Report_ID = sr.Shift_Report_ID "
strCommand += " inner join Shift_Types st on sr.Shift_Type_ID = st.Shift_Type_ID "
strCommand += " inner join Employee dispatcher on bi.Dispatcher_ID = dispatcher.employee_id "
strCommand += " inner join Employee completing on bi.Employee_Completing_Billing_Inquiry_ID = completing.employee_id "
strCommand += " left outer join Employee Who_Created on bi.Who_Created = Who_Created.Employee_ID "
strCommand += " left outer join Employee Who_Updated on bi.Who_Updated = Who_Updated.Employee_ID "
strCommand += " left outer join Employee Who_Deleted on bi.Who_Deleted = Who_Deleted.Employee_ID "
strCommand += " inner join ( "
strCommand += " select Parameters_ID as ParamRequestedByID, Parameters_Value as ParamRequestedByDesc "
strCommand += " from Parameters_Details pd1, Parameters_Header ph "
strCommand += " where ph.parameters_group = pd1.parameters_group "
strCommand += " And pd1.parameters_group = @Parameters_Group "
strCommand += " And pd1.parameters_effective_date = "
strCommand += " (select max(pd2.parameters_effective_date) "
strCommand += " from parameters_details pd2 "
strCommand += " where pd2.parameters_group = pd1.parameters_group "
strCommand += " and pd2.parameters_id = pd1.parameters_id "
strCommand += " and pd2.parameters_effective_date <= @Parameters_Effective_Date) "
strCommand += " ) ParamRequestedBy on bi.Requested_By = ParamRequestedBy.ParamRequestedByID "
strCommand += " where 1=1 "
strCommand += strShiftType
strCommand += strShiftDate
strCommand += strRequestedBy
strCommand += txtCallNumberlike
strCommand += strCallDate
strCommand += strDispatcher
strCommand += strEmployeeCompletingBillingInquiry
strCommand += strWhenCreated
strCommand += strWhoCreated
strCommand += strWhenUpdated
strCommand += strWhoUpdated
strCommand += strIsDeleted
strCommand += strWhenDeleted
strCommand += strWhoDeleted
strCommand += " group by DATENAME(year, Call_Date) + ' ' + case when len(cast(month(Call_Date) as varchar)) = 1 then '0' + cast(month(Call_Date) as varchar) else cast(month(Call_Date) as varchar) end "
strCommand += " order by DATENAME(year, Call_Date) + ' ' + case when len(cast(month(Call_Date) as varchar)) = 1 then '0' + cast(month(Call_Date) as varchar) else cast(month(Call_Date) as varchar) end "
End If
Dim Parameters_Hashtable As New Hashtable
Parameters_Hashtable("@CallNumber") = txtCallNumber.Text & "%"
Parameters_Hashtable("@Parameters_Group") = Parameters_Group_In
Parameters_Hashtable("@Parameters_Effective_Date") = Parameters_Effective_Date_In
Dim dtBillingInquiries As DataTable = DataAccess.GetDataAsDataSet( _
strCommand, _
"BillingInquiries", _
Parameters_Hashtable, _
Error_Message _
).Tables("BillingInquiries")
If (Error_Message = "") Then
If ViewState("Submit") = "Submit" Then
grdResults.DataSource = dtBillingInquiries
If dtBillingInquiries.Rows.Count > 0 Then
grdResults.Visible = True
grdResults.DataBind()
lblNoneFound.Visible = False
btnExportToExcel.Visible = True
End If
End If
If ViewState("Submit") = "SubmitRequestedBy" Then
grdResultsRequestedBy.DataSource = dtBillingInquiries
If dtBillingInquiries.Rows.Count > 0 Then
grdResultsRequestedBy.Visible = True
grdResultsRequestedBy.DataBind()
SetGraph(dtBillingInquiries)
lblNoneFound.Visible = False
btnExportToExcel.Visible = True
End If
End If
If ViewState("Submit") = "SubmitCallDate" Then
grdResultsCallDate.DataSource = dtBillingInquiries
If dtBillingInquiries.Rows.Count > 0 Then
grdResultsCallDate.Visible = True
grdResultsCallDate.DataBind()
SetGraph(dtBillingInquiries)
lblNoneFound.Visible = False
btnExportToExcel.Visible = True
End If
End If
Else
lblMessage.Text = Error_Message
End If
End Sub
答案 1 :(得分：0)
您将不得不遍历列表集合并使用它来修改where子句。
当然，除非这是一个绝对没有使用敏感数据的应用程序，并且您用来连接数据库的用户绝对无法访问敏感数据，您应该使用存储过程而不是代码中的查询，<强> and you should never use user input directly to build an SQL statement 即可。这意味着您还必须计划在存储过程中使用if语句。
您的存储过程如下所示：
CREATE PROCEDURE [dbo].[SearchProcedure]
@FilterByLoginID bit,
@LoginId varchar(10)
AS
DECLARE @SqlQuery varchar (250);
SET @SqlQuery = 'Select FirstName, LastName FROM CustomerList'
if @FilterByLoginID = 1
BEGIN
SET @SqlQuery = @SqlQuery + ' WHERE LoginId = ' + CAST(@LoginID AS varchar(10))
END
Execute(@SqlQuery)
这是一个让你前往的链接...... http://www.codeproject.com/KB/database/Building_Dynamic_SQL.aspx
答案 2 :(得分：0)
你可以选择这样的
select * from myTable m
where m.optional1==$value or $value==-1
m.optional2==$value or $value==-1
..
请注意，“ - 1”不能是域中的有效值。
答案 3 :(得分：0)
我假设你有类似的东西：
例如，页面上有两个复选框项：[]还有Expanded Package []还有HBO。等 - 基本上是'找到所有居住在城市，州，邮政（如果选择HBO）的人，并且还支付了HBO套餐'。
现在，如果你自己编写SQL，那就是“SELECT * FROM Users WHERE State = @State AND City = @City AND ZipCode = @ZipCode AND HasHboPackage = 1”。但我们需要使用动态SQL将它们组合在一起。
我的建议是将表格放在一起并在那里创建额外的SQL，所以你传入存储过程的所有内容都是选择项目的ID（没有输入数据的传输）。示例代码：
DECLARE @Items TABLE
(
ID INT,
DisplayName VARCHAR(200),
SQLStatement VARCHAR(200)
)
INSERT INTO @Items (ID, DisplayName, SQLStatement) VALUES (1, 'Has Expanded Package', 'HasExpandedPackage = 1')
INSERT INTO @Items (ID, DisplayName, SQLStatement) VALUES (2, 'Has HBO Package', 'HasHBOPackage = 1')
SELECT * FROM @Items
DECLARE @City VARCHAR(200)
DECLARE @State VARCHAR(2)
DECLARE @ZipCode VARCHAR(5)
DECLARE @Statement VARCHAR(1000)
DECLARE @SelectedOptions VARCHAR(30)
SET @City = 'Dallas'
SET @State = 'TX'
SET @ZipCode = '12345'
SET @SelectedOptions = '2'
DECLARE @TempOptionsTable TABLE
(
OptionID VARCHAR(3)
)
DECLARE @Delimiter VARCHAR(1)
DECLARE @StartPosition INT
DECLARE @Length INT
DECLARE @Item VARCHAR(3)
SET @Delimiter = ','
WHILE LEN(@SelectedOptions) > 0
BEGIN
SET @StartPosition = CHARINDEX(@Delimiter, @SelectedOptions)
IF @StartPosition < 0
BEGIN
SET @StartPosition = 0
END
SET @Length = LEN(@SelectedOptions) - @StartPosition - 1
IF @Length < 0
BEGIN
SET @Length = 0
END
IF @StartPosition > 0
BEGIN
SET @Item = SUBSTRING(@SelectedOptions, 1, @StartPosition - 1)
SET @SelectedOptions = SUBSTRING(@SelectedOptions, @StartPosition + 1, LEN(@SelectedOptions) - @StartPosition)
END
ELSE
BEGIN
SET @Item = @SelectedOptions
SET @SelectedOptions = ''
END
INSERT INTO @TempOptionsTable (OptionID) VALUES (@Item)
END
DECLARE @StatementTable TABLE
(
StatementID INT IDENTITY,
OptionID INT,
SQLStatement VARCHAR(200)
)
SELECT * FROM @StatementTable
--SELECT I.* FROM @TempOptionsTable TOT INNER JOIN @Items I ON I.ID = TOT.OptionID
INSERT INTO @StatementTable
SELECT I.ID, I.SQLStatement FROM @TempOptionsTable TOT INNER JOIN @Items I ON I.ID = TOT.OptionID
SELECT * FROM @StatementTable
DECLARE @Iterator INT
DECLARE @MaxIndex INT
DECLARE @TempStatement VARCHAR(200)
SELECT @Iterator = MIN(StatementID) FROM @StatementTable
SELECT @MaxIndex = MAX(StatementID) FROM @StatementTable
SELECT @Iterator, @MaxIndex
SELECT @Statement = 'SELECT * FROM Users WHERE City = ''' + @City + ''' AND State = ''' + @State + ''' AND ZipCode = ''' + @ZipCode + ''''
SELECT @Statement
WHILE @Iterator < (@MaxIndex + 1)
BEGIN
SELECT @TempStatement = SQLStatement FROM @StatementTable WHERE StatementID = @Iterator
SET @Statement = @Statement + ' AND ' + @TempStatement
SET @Iterator = @Iterator + 1
END
SELECT @Statement
--EXEC(@Statement)
这样，您只需在语句表中添加一条新记录，即可获得数据绑定和额外搜索功能。您需要确保城市状态和邮政编码字段已正确清理，因为如果这些字段是打开的文本字段（而不是删除或其他内容），它们可能会被利用到SQL注入。