如何使用Regex表达式匹配宽度和高度大小，以及如何在SQL或C＃中使用“排序依据”来构建下拉列表？

Question

我有一个SQL查询，它将检索下表，但我想在下拉选择中以降序（从小到大）正确地排列板子的大小。 我正在使用C＃从对象构建Dropdown选择。

这是当前SQL查询返回的内容。

DECLARE @StockID int = 680

DECLARE @VariationParent int = (SELECT TOP 1 StockParent_ParentId FROM 
StockVariations SV INNER JOIN FinGoodsParent FGP ON FGP.Id = 
SV.StockParent_ChildId WHERE StockParent_ChildId = @StockID AND SV.IsDeleted = 0 
AND FGP.IsDeleted = 0 AND FGP.Publish = 1) 


 SELECT DISTINCT AV.ID, AV.AttrValue, AV.AttributeTypes_Id 'AttributeTypeID', CAST(CASE WHEN SA.StockParent_Id = @StockID THEN 1 ELSE 0 END as BIT) 'IsDefault' 
   FROM AttributeTypes AT 
  INNER JOIN AttributeValues AV ON AV.AttributeTypes_Id = AT.Id 
  INNER JOIN StockParent_AttributeValues SA on SA.AttributeValue_Id = AV.Id 
  INNER JOIN FinGoodsParent FGP ON FGP.Id = SA.StockParent_Id AND FGP.IsDeleted = 0 AND FGP.Publish = 1
  WHERE SA.StockParent_Id IN (SELECT SV.StockParent_ChildId FROM StockVariations SV INNER JOIN FinGoodsParent FGP ON FGP.Id = SV.StockParent_ChildId AND FGP.IsDeleted = 0 AND FGP.Publish = 1 WHERE SV.StockParent_ParentId = @VariationParent AND SV.IsDeleted = 0) 
  AND SA.IsDeleted = 0 AND AT.IsDeleted = 0 AND AV.IsDeleted = 0
  ORDER BY AV.AttrValue DESC

我尝试使用有效的JQuery代码，但它替换了下拉选择的值，这将阻止我的Ajax函数检索正确的信息。

这是可以工作的JQuery代码，但是我想用SQL或C＃进行 。 下面的代码将对带有数字的任何内容进行正则表达式匹配，并去除第一个数字并比较大小。 必须注意的是，有时数据库中的大小可以用x而不是*来分隔值。

<select class="variation-picker">   
    <option value="42">1500*900</option>
    <option value="48">900*900</option>
    <option value="46">2400*600</option>
    <option value="49">600*600</option>
</select>

$( document ).ready(function() {
    $(".variation-picker").html($(".variation-picker option").val(function () {
        return this.text.match(/\d+/);
    }).sort(function (a, b) {
        var a = parseInt(a.value, 10), b = parseInt(b.value, 10);
        return a < b ? -1 : 1;
     }));

    $('.variation-picker').find('option[selected="selected"]').each(function () {
        $(this).prop('selected', true);
    });

});

这是我用来构建变体选择下拉列表的C＃代码。 该AttrValue列还可以包含值，如colour或meters ，所以它不应该仅仅依赖于数值。 我真的不想创建带有订单优先级等的单独表格。

if (ProductDetails.ProductVariations?.Count > 0)
        {
            var html = new System.Text.StringBuilder();
            var colCount = 0;

            //Build the variations dropdowns

            ProductDetails.ProductVariations.ForEach(p =>
            {
                if (colCount == 2)
                {
                    colCount = 0;
                    html.AppendLine("</div>");
                    html.AppendLine("<div class='row'>");
                }

                html.AppendLine("<div class='col-md-6 single-variation-div'>");
                html.AppendLine($"<span class='text_select' id='v_{p.ID}'>{p.Name}</span><br />");
                html.AppendLine("<select class='selectpicker variation-picker' data-width='300px' onchange='javascript:ChangeProductVariance();'> ");
                p.ProdVariationValues.ForEach(v => html.AppendLine($"<option value='{v.ID}' { (v.IsDefault ? "selected='selected'" : "") }>{v.AttrValue}</option>"));
                html.AppendLine("</select><br/>");
                html.AppendLine("</div>");

                colCount++;
            });

            ProductVarienceHTML = html.ToString();
        }
        else
        {
            ProductVarienceHTML = "";
        }

Answer 1

我建议您通过以下方法从表结构中解决该问题：通过添加具有（INT）数据类型的高度和宽度的列，然后按（height * width）进行排序

Answer 2

最好的解决方案和最快的解决方案是@Ahmad Alkaraki所说的。

如果您不能这样做，那么这是一个可行的解决方案。 SPLIT AttrValue并将其转换为int，然后extext width和height ，然后提取size

看看order by

我不确定在您的mssql中func LAST EXIST是否存在，但是您知道了

 SELECT DISTINCT AV.ID, AV.AttrValue, AV.AttributeTypes_Id 'AttributeTypeID', CAST(CASE WHEN SA.StockParent_Id = @StockID THEN 1 ELSE 0 END as BIT) 'IsDefault',

   FROM AttributeTypes AT 
  INNER JOIN AttributeValues AV ON AV.AttributeTypes_Id = AT.Id 
  INNER JOIN StockParent_AttributeValues SA on SA.AttributeValue_Id = AV.Id 
  INNER JOIN FinGoodsParent FGP ON FGP.Id = SA.StockParent_Id AND FGP.IsDeleted = 0 AND FGP.Publish = 1
  WHERE SA.StockParent_Id IN (SELECT SV.StockParent_ChildId FROM StockVariations SV INNER JOIN FinGoodsParent FGP ON FGP.Id = SV.StockParent_ChildId AND FGP.IsDeleted = 0 AND FGP.Publish = 1 WHERE SV.StockParent_ParentId = @VariationParent AND SV.IsDeleted = 0) 
  AND SA.IsDeleted = 0 AND AT.IsDeleted = 0 AND AV.IsDeleted = 0
  ORDER BY ((SELECT top 1 cast(value as int) FROM STRING_SPLIT(AT.AttrValue, "*") *
            (SELECT cast(LAST(value)) FROM STRING_SPLIT(AT.AttrValue, "*")) DESC

Answer 3

万一您不能通过添加height和width列来更改数据库架构，以防万一：

假设这是您的模式，只是为了简化您的原始查询：

CREATE TABLE attributes
    ([AttrValue] varchar(13))
;

INSERT INTO attributes
    ([AttrValue])
VALUES
    ('900*900mm'),
    ('1200*900mm'),
    ('1200*1200mm')
;

让我们创建一个按height * width降序排序的查询：

SELECT
  attrValue,
  CONVERT(int, (select top 1 value from STRING_SPLIT(attrValue, '*'))) as [leftAttrValue],
  CONVERT(int, (select top 1 LEFT(value, LEN(value) - 2) from STRING_SPLIT(attrValue, '*') where value LIKE '%mm')) as [rightAttrValue]
FROM
  attributes
ORDER BY 
    CONVERT(int, (select top 1 value from STRING_SPLIT(attrValue, '*'))) * 
    CONVERT(int, (select top 1 LEFT(value, LEN(value) - 2) from STRING_SPLIT(attrValue, '*') where value LIKE '%mm'))  DESC
  ;

该查询的结果是这样的：

|   attrValue | leftAttrValue | rightAttrValue |
|-------------|---------------|----------------|
| 1200*1200mm |          1200 |           1200 |
|  1200*900mm |          1200 |            900 |
|   900*900mm |           900 |            900 |

您可以在以下SQL Server小提琴中对此进行测试： http ://sqlfiddle.com/#!18/ 691b3/11

因此，我们现在将对此进行调整以解决您的问题：

SELECT DISTINCT AV.ID, AV.AttrValue, AV.AttributeTypes_Id 'AttributeTypeID', CAST(CASE WHEN SA.StockParent_Id = @StockID THEN 1 ELSE 0 END as BIT) 'IsDefault' 
   FROM AttributeTypes AT 
  INNER JOIN AttributeValues AV ON AV.AttributeTypes_Id = AT.Id 
  INNER JOIN StockParent_AttributeValues SA on SA.AttributeValue_Id = AV.Id 
  INNER JOIN FinGoodsParent FGP ON FGP.Id = SA.StockParent_Id AND FGP.IsDeleted = 0 AND FGP.Publish = 1
  WHERE SA.StockParent_Id IN (SELECT SV.StockParent_ChildId FROM StockVariations SV INNER JOIN FinGoodsParent FGP ON FGP.Id = SV.StockParent_ChildId AND FGP.IsDeleted = 0 AND FGP.Publish = 1 WHERE SV.StockParent_ParentId = @VariationParent AND SV.IsDeleted = 0) 
  AND SA.IsDeleted = 0 AND AT.IsDeleted = 0 AND AV.IsDeleted = 0
  ORDER BY 
      CONVERT(int, (select top 1 value from STRING_SPLIT(AV.AttrValue, '*'))) * 
      CONVERT(int, (select top 1 LEFT(value, LEN(value) - 2) from STRING_SPLIT(AV.AttrValue, '*') where value LIKE '%mm'))  
    DESC