C# 如何向要删除的存储过程传递sql参数的字符串列表?
我有下面的方法,该方法应该从作为参数传入的列表中给定的数据库中删除假日名称。我遇到的问题是它没有从数据库中删除任何内容。以下是我遇到问题的部分方法:C# 如何向要删除的存储过程传递sql参数的字符串列表?,c#,sql,asp.net-core,asp.net-core-webapi,C#,Sql,Asp.net Core,Asp.net Core Webapi,我有下面的方法,该方法应该从作为参数传入的列表中给定的数据库中删除假日名称。我遇到的问题是它没有从数据库中删除任何内容。以下是我遇到问题的部分方法: private void RemoveGloOrderDays(List<SessionInfoList> sessionList, List<Holiday> selectedOrderHolidays, List<Holiday> selectedHolidays, List<string> or
private void RemoveGloOrderDays(List<SessionInfoList> sessionList, List<Holiday> selectedOrderHolidays, List<Holiday> selectedHolidays, List<string> orderDays, List<string> noOrderDays)
{
try
{
using (SqlCommand cmd = new SqlCommand())
using (SqlConnection connection = new SqlConnection(ConnectionString))
{
cmd.CommandTimeout = 600;
cmd.CommandText = "[dbo].[RemoveGlobalOrderDays]";
cmd.CommandType = CommandType.StoredProcedure;
cmd.Connection = connection;
cmd.Parameters.Add("@SessionId", SqlDbType.Int);
cmd.Parameters.Add("@SelectedOrderHolidays", SqlDbType.NVarChar);
cmd.Parameters.Add("@SelectedHolidays", SqlDbType.NVarChar);
cmd.Parameters.Add("@OrderDays", SqlDbType.NVarChar);
cmd.Parameters.Add("@NoOrderDays", SqlDbType.NVarChar);
connection.Open();
foreach (SessionInfoList session in sessionList)
{
cmd.Parameters["@SessionId"].Value = session.SessionID;
cmd.Parameters["@SelectedOrderHolidays"].Value = DBNull.Value;
string joinedNames = string.Join(",", selectedOrderHolidays.Select(h => h.Name.Trim()));
if (!string.IsNullOrEmpty(joinedNames))
{
cmd.Parameters["@SelectedOrderHolidays"].Value = joinedNames;
}
cmd.Parameters["@SelectedHolidays"].Value = DBNull.Value;
joinedNames = string.Join(",", selectedHolidays.Select(h => h.Name.Trim()));
if (!string.IsNullOrEmpty(joinedNames))
{
cmd.Parameters["@SelectedHolidays"].Value = joinedNames;
}
您可以对参数@Selectedholidays和@selectedorderholidays使用表值参数,然后类似于
DELETE [SessionHolidayMapping] FROM [SessionHolidayMapping] A
Inner join @selectedholidays S
On A.[HolidayName] = S.Holidayname where A.[SessionId] = @SessionId.
“HolidayName”是参数的一列
我正在使用手机,无法对其进行适当的测试。您可以使用表值参数@Selectedholidays和@selectedorderholidays等参数,而不是使用nvarchar
DELETE [SessionHolidayMapping] FROM [SessionHolidayMapping] A
Inner join @selectedholidays S
On A.[HolidayName] = S.Holidayname where A.[SessionId] = @SessionId.
“HolidayName”是参数的一列
我正在使用手机,无法对其进行适当测试。据我所知,您正在传递用逗号分隔的姓名列表,并且希望删除所有这些姓名。您需要使用IN运算符查找所有应删除的假日名称 以下是如何为@SelectedHolidays执行此操作的示例:
declare @SelectedHolidays nvarchar(500) = 'H1,H2,H3'
declare @SelectedHolidaysXml xml = cast(replace(N'<R><I>' + @SelectedHolidays + N'</I></R>', ',', '</I><I>') as xml)
DELETE FROM [SessionHolidayMapping]
WHERE [HolidayName] in (select x.items.value('(.)[1]', 'NVARCHAR(500)') from @SelectedHolidaysXml.nodes('/R/I') as x(items))
AND [SessionId] = @SessionId
declare@SelectedHolidays nvarchar(500)='H1、H2、H3'
声明@SelectedHolidaysXml=cast(将(N'+@SelectedHolidays+N'',','',''替换为xml)
从[SessionHolidayMapping]中删除
其中,[HolidayName]在(从@SelectedHolidaysXml.nodes('/R/I')中选择x.items.value('(..[1]','NVARCHAR(500'))作为x(items))
和[SessionId]=@SessionId
这很难看,但我不知道有什么更好的方法可以在sql server中拆分逗号分隔的值。据我所知,您正在传递以逗号分隔的名称列表,并且希望删除所有这些名称。您需要使用IN运算符查找所有应删除的假日名称 以下是如何为@SelectedHolidays执行此操作的示例:
declare @SelectedHolidays nvarchar(500) = 'H1,H2,H3'
declare @SelectedHolidaysXml xml = cast(replace(N'<R><I>' + @SelectedHolidays + N'</I></R>', ',', '</I><I>') as xml)
DELETE FROM [SessionHolidayMapping]
WHERE [HolidayName] in (select x.items.value('(.)[1]', 'NVARCHAR(500)') from @SelectedHolidaysXml.nodes('/R/I') as x(items))
AND [SessionId] = @SessionId
declare@SelectedHolidays nvarchar(500)='H1、H2、H3'
声明@SelectedHolidaysXml=cast(将(N'+@SelectedHolidays+N'',','',''替换为xml)
从[SessionHolidayMapping]中删除
其中,[HolidayName]在(从@SelectedHolidaysXml.nodes('/R/I')中选择x.items.value('(..[1]','NVARCHAR(500'))作为x(items))
和[SessionId]=@SessionId
这很难看,但我不知道有什么更好的方法可以在sql server中拆分逗号分隔的值