我试图用存储过程替换视图以基于关键字搜索结果。但是当我传递关键字时会引发错误
查询结果不能被多次枚举
但如果将关键字留空，则效果很好。以下是我获取搜索结果的方法。在这种情况下，谁能提供有关如何枚举结果的建议？
public IEnumerable <BrandNameToIngredient> GetBrandNameToIngMapResults(string Keyword)
{
IEnumerable<BrandNameToIngredient> lstBrandNametoIng = from map in DB.USP_BRANDNAME_INGREDIENT_MAP()
select new BrandNameToIngredient
{
IngredientBrandNameMapID=map.INGREDIENT_PRODUCT_MAP_ID,
BrandName = map.FDA_BRAND_NAME, //From Table 1
PFCName = map.PFC_DESC==null?"":map.PFC_DESC, //From Table 1
IngredientName = map.INGREDIENT_NAME, //From Table 2
HCIngredientName = map.HC_INGREDIENT_NAME, //From Table 2
KeywordfromPage = Keyword
};
if (!string.IsNullOrEmpty(Keyword))
{
lstBrandNametoIng = lstBrandNametoIng.Where(x => x.BrandName.ToLower().Contains(x.KeywordfromPage.ToLower()) //Able to get result
|| x.PFCName.ToLower().Contains(x.KeywordfromPage.ToLower()) //Able to get result
|| x.IngredientName.ToLower().Contains(x.KeywordfromPage.ToLower()) //Error Here
|| x.HCIngredientName.ToLower().Contains(x.KeywordfromPage.ToLower())); //Error Here
}
return lstBrandNametoIng;
}
最好先对查询进行操作，然后最后返回可枚举。
public IEnumerable<BrandNameToIngredient> GetBrandNameToIngMapResults(string Keyword)
{
var brandNametoIngQuery = DB.USP_BRANDNAME_INGREDIENT_MAP()
.Where(x => string.IsNullOrEmpty(Keyword)
|| x.BrandName.Contains(Keyword, StringComparison.OrdinalIgnoreCase)
|| x.PFCName.Contains(Keyword, StringComparison.OrdinalIgnoreCase)
|| x.IngredientName.Contains(Keyword, StringComparison.OrdinalIgnoreCase)
|| x.HCIngredientName.Contains(Keyword, StringComparison.OrdinalIgnoreCase))
.Select(map=> new BrandNameToIngredient
{
IngredientBrandNameMapID = map.INGREDIENT_PRODUCT_MAP_ID,
BrandName = map.FDA_BRAND_NAME, //From Table 1
PFCName = map.PFC_DESC == null ? "" : map.PFC_DESC, //From Table 1
IngredientName = map.INGREDIENT_NAME, //From Table 2
HCIngredientName = map.HC_INGREDIENT_NAME, //From Table 2
KeywordfromPage = Keyword
}).AsEnumerable();
}
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