System.Linq.Dynamic - Can I use IN clause in WHERE statement

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日久生厌
日久生厌 2020-12-14 11:09

I have dynamic linq WHERE statement:

dataContext.Table.Where(\"id = 0 Or id = 1 Or id = 2 Or ...\");

I want change to:

data         


        
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  •  执笔经年
    2020-12-14 11:22

    From How to use “contains” or “like” in a dynamic linq query?

    //edit: this is probably broken, see below
    ids = new int[] {1,2,3,4};
    dataContext.Table.Where("id.Contains(@0)", ids);
    

    Aside: It is good practice to use placeholders in dynamic linq expressions. Otherwise you may open yourself to linq injection attacks (Is Injection Possible through Dynamic LINQ?)


    EDIT:

    actually I think I messed this up. Unfortunately I cannot test this at the moment. But I think the correct syntax in this case should be dataContext.Table.Where("@0.Contains(id)",ids);, not the other way around, and that version does not work out-of-the-box.

    See here for a way to add this functionality to dynamic link. You need to modify the library for this.

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