[英]Dapper dynamic parameter
I am using dapper and dynamicParameters to get data from SQL Server in a Web API project (.NET 5).我正在使用 dapper 和 dynamicParameters 从 Web API 项目(.NET 5)中的 SQL 服务器获取数据。
It works most of the time without any problems, but sometimes I get the following error它大部分时间都可以正常工作,但有时我会收到以下错误
Procedure or function MySP has too many arguments specified.
程序或 function MySP 指定了太多 arguments。
I suspect due to simultaneous requests, the parameters are duplicated.我怀疑由于同时请求,参数是重复的。 Is there a solution to this problem?
这个问题有解决方案吗?
string sp = "MySP";
if (ADOFunctions.IsConncetionReadyToOpen(Connection))
{
await Connection.OpenAsync();
}
var queryParameters = new DynamicParameters();
queryParameters.Add("@Date", dateTime.Date);
queryParameters.Add("@ClientRef", clientRef);
queryParameters.Add("@orderRefs", orderRefList);
var countLimitation = await Connection.QueryAsync<UnityExhibitionOrdersInfo>
(sql: sp, param: queryParameters, commandType: System.Data.CommandType.StoredProcedure);
foreach (var item in countLimitation)
{
if (item.Sold > item.Limit)
{
returnVal.Message += $"error ";
returnVal.Result = false;
}
}
Firstly, it should be noted that you don't even need DynamicParameters
here;首先,需要注意的是,这里甚至不需要
DynamicParameters
; a simple:一个简单的:
new { dateTime.Date, ClientRef = clientRef, orderRefs = orderRefList }
should be more than sufficient for the parameters, since this is a simple usage, but: either way, your queryParameters
object is local and not shared (which is good).对于参数来说应该绰绰有余,因为这是一个简单的用法,但是:无论哪种方式,您的
queryParameters
object 都是本地的而不是共享的(这很好)。 This should work absolutely fine - my suspicion, then, would be: "is Connection
somehow shared between requests / concurrent async flows on the same request?"这应该工作得很好——然后,我的怀疑是:“
Connection
是否以某种方式在同一请求上的请求/并发异步流之间共享?” (it absolutely must not be; ADO.NET connections are not thread-safe and are not intended for concurrent access). (绝对不能这样;ADO.NET 连接不是线程安全的,不适合并发访问)。
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