英文:
C# WPF Reuseable combobox populate method
问题
以下是代码的翻译部分：
我有以下代码来使用LookupItem数据服务来填充一个ConboBox。 是否有办法通过能够传递模型/类名和用于DisplayMember的'Name'属性来使此代码可重用，即在下面的情况下'GradeName'。非常感谢。public async Task<IEnumerable<LookupItem>> GetGradeLookupAsync(){using (var ctx = _contextCreator()){return await ctx.Grades.AsNoTracking().Select(g =>new LookupItem{Id = g.Id,DisplayMember = g.GradeName}).ToListAsync();}}
英文:
I have the following code to populate a ConboBox using a LookupItem data service. Is there any way to make this code reuseable by being able to pass in the Model/Class name and the 'Name' property which is used for the DisplayMember, i.e. in the case below 'GradeName'.
Many Thanks.
public async Task<IEnumerable<LookupItem>> GetGradeLookupAsync(){using (var ctx = _contextCreator()){return await ctx.Grades.AsNoTracking().Select(g =>new LookupItem{Id = g.Id,DisplayMember = g.GradeName}).ToListAsync();}}
答案1
得分: 1
你可以尝试使用通用方法。类似这样的：
public async Task<IEnumerable<LookupItem>> GetGradeLookupAsync<T>(Func<MyContext, IList<T>> dbSet,Func<T, int> idProperty,Func<T, string> nameProperty){using (var ctx = _contextCreator()){var set = dbSet(ctx);return set.Select(g =>new LookupItem{Id = idProperty(g),DisplayMember = nameProperty(g)}).ToListAsync();}}
示例用法：
await GetGradeLookupAsync(ctx => ctx.Grades, g => g.Id, g => g.GradeName);
英文:
You could try with a generic method. Something like this:
public async Task<IEnumerable<LookupItem>> GetGradeLookupAsync<T>(Func<MyContext, IList<T>> dbSet,Func<T, int> idProperty,Func<T, string> nameProperty){using (var ctx = _contextCreator()){var set = dbSet(ctx);return set.Select(g =>new LookupItem{Id = idProperty(g),DisplayMember = nameProperty(g)});.ToListAsync();}}
Sample usage:
await GetGradeLookupAsync(ctx => ctx.Grades, g => g.Id, g => g.GradeName);
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