本文介绍了精致的"IN"子句不适用于多个值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
场景:
我的模型中有一个字符串属性，其中包含来自 MultiSelectList @ Html.ListBox 的ID.如果我选择两个列表项，则我的属性值将如下所示: 0100,0500 .
I have a string property in my model that holds the IDs from a MultiSelectList @Html.ListBox. If I select two list items, my property value will look like this 0100,0500.
问题:
Dapper where子句仅适用于单个值:
Dapper where clause will only work with a single value:
CODE IN (@SomeCode) // for example, 0100 or 0500 returns results
CODE IN (@SomeCode) // 0100,0500 does not return results.
推荐答案
这是因为您不需要告诉Dapper使用括号().它会自己做的很好.试试这个:
That's because you don't need to tell Dapper to use parenthesis (). It will do fine by its own. Try this:
var codes = new List<string> { "0100","0500"};
var sql = "select * from SomeTable where CODE IN @codes";
var items = connection.Query(sql, new { codes });
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