CAML查询与嵌套的，或用于多个字段。

I am working on proof-of-concept code to dynamically generate CAML based on keywords provided to a highly-specific search web service that I am writing. I am not using the SharePoint-provided search web service for this proof. I have done so already for what I am trying to achieve. From all of my research, I cannot find a close example for what I am trying to achieve, which is to check multiple fields for multiple values. Yes, I have looked on SO already for my answer, including this one: Need help on building CAML Query.

我正在研究概念验证代码，根据我正在编写的高度特定的搜索web服务，动态地生成基于关键字的CAML。我没有使用sharepoint提供的搜索web服务来证明这一点。我已经做了我想要实现的事情。从我的所有研究中，我无法找到一个我想要实现的例子，即检查多个字段的多个值。是的，我已经看了我的答案，包括这个:需要帮助建立CAML查询。

With that said, if it is possible, how can the following SQL-like query be written in CAML?

这样的话，如果可能的话，如何在CAML中编写下一个类似sql的查询呢?

SELECT FirstName, LastName, Description, Profile
FROM SomeFakeTable
WHERE (FirstName = 'John' OR LastName = 'John' OR Description = 'John' OR Profile='John')
  AND (FirstName = 'Doe' OR LastName = 'Doe' OR Description = 'Doe' OR Profile='Doe')
  AND (FirstName = '123' OR LastName = '123' OR Description = '123' OR Profile='123')

3 个解决方案

#1

Since you are not allowed to put more than two conditions in one condition group (And | Or) you have to create an extra nested group (MSDN). The expression A AND B AND C looks like this:

由于您不允许在一个条件组(和|或)中放置超过两个条件，您必须创建一个额外的嵌套组(MSDN)。A和B和C的表达式是这样的:

<And>
    A
    <And>
        B
        C
    </And>
</And>

Your SQL like sample translated to CAML (hopefully with matching XML tags ;) ):

您的SQL样例转换为CAML(希望使用匹配的XML标记):

<Where>
    <And>
        <Or>
            <Eq>
                <FieldRef Name='FirstName' />
                <Value Type='Text'>John</Value>
            </Eq>
            <Or>
                <Eq>
                    <FieldRef Name='LastName' />
                    <Value Type='Text'>John</Value>
                </Eq>
                <Eq>
                    <FieldRef Name='Profile' />
                    <Value Type='Text'>John</Value>
                </Eq>
            </Or>
        </Or>
        <And>       
            <Or>
                <Eq>
                    <FieldRef Name='FirstName' />
                    <Value Type='Text'>Doe</Value>
                </Eq>
                <Or>
                    <Eq>
                        <FieldRef Name='LastName' />
                        <Value Type='Text'>Doe</Value>
                    </Eq>
                    <Eq>
                        <FieldRef Name='Profile' />
                        <Value Type='Text'>Doe</Value>
                    </Eq>
                </Or>
            </Or>
            <Or>
                <Eq>
                    <FieldRef Name='FirstName' />
                    <Value Type='Text'>123</Value>
                </Eq>
                <Or>
                    <Eq>
                        <FieldRef Name='LastName' />
                        <Value Type='Text'>123</Value>
                    </Eq>
                    <Eq>
                        <FieldRef Name='Profile' />
                        <Value Type='Text'>123</Value>
                    </Eq>
                </Or>
            </Or>
        </And>
    </And>
</Where>

#2

You can try U2U Query Builder http://www.u2u.net/res/Tools/CamlQueryBuilder.aspx you can use their API U2U.SharePoint.CAML.Server.dll and U2U.SharePoint.CAML.Client.dll

您可以尝试使用U2U查询生成器http://www.u2u.net/res/Tools/CamlQueryBuilder.aspx，您可以使用它们的API U2U.SharePoint.CAML.Server。dll和U2U.SharePoint.CAML.Client.dll

I didn't use them but I'm sure it will help you achieving your task.

我没有使用它们，但我相信它会帮助你完成任务。

#3

This code will dynamically generate the expression for you with the nested clauses. I have a scenario where the number of "OR" s was unknown, so I'm using the below. Usage:

此代码将使用嵌套的子句动态地为您生成表达式。我有一个场景，其中“或”的数量未知，所以我使用下面的。用法:

        private static void Main(string[] args)
        {
            var query = new PropertyString(@"<Query><Where>{{WhereClauses}}</Where></Query>");
            var whereClause =
                new PropertyString(@"<Eq><FieldRef Name='ID'/><Value Type='Counter'>{{NestClauseValue}}</Value></Eq>");
            var andClause = new PropertyString("<Or>{{FirstExpression}}{{SecondExpression}}</Or>");

            string[] values = {"1", "2", "3", "4", "5", "6"};

            query["WhereClauses"] = NestEq(whereClause, andClause, values);

            Console.WriteLine(query);
        }

And here's the code:

这是代码:

   private static string MakeExpression(PropertyString nestClause, string value)
        {
            var expr = nestClause.New();
            expr["NestClauseValue"] = value;
            return expr.ToString();
        }

        /// <summary>
        /// Recursively nests the clause with the nesting expression, until nestClauseValue is empty.
        /// </summary>
        /// <param name="whereClause"> A property string in the following format: <Eq><FieldRef Name='Title'/><Value Type='Text'>{{NestClauseValue}}</Value></Eq>"; </param>
        /// <param name="nestingExpression"> A property string in the following format: <And>{{FirstExpression}}{{SecondExpression}}</And> </param>
        /// <param name="nestClauseValues">A string value which NestClauseValue will be filled in with.</param>
        public static string NestEq(PropertyString whereClause, PropertyString nestingExpression, string[] nestClauseValues, int pos=0)
        {
            if (pos > nestClauseValues.Length)
            {
                return "";
            }

            if (nestClauseValues.Length == 1)
            {
                return MakeExpression(whereClause, nestClauseValues[0]);
            }

            var expr = nestingExpression.New();
            if (pos == nestClauseValues.Length - 2)
            {
                expr["FirstExpression"] = MakeExpression(whereClause, nestClauseValues[pos]);
                expr["SecondExpression"] = MakeExpression(whereClause, nestClauseValues[pos + 1]);
                return expr.ToString();
            }
            else
            {
                expr["FirstExpression"] = MakeExpression(whereClause, nestClauseValues[pos]);
                expr["SecondExpression"] = NestEq(whereClause, nestingExpression, nestClauseValues, pos + 1);
                return expr.ToString();
            }
        }






          public class PropertyString
    {
        private string _propStr;

        public PropertyString New()
        {
            return new PropertyString(_propStr );
        }

        public PropertyString(string propStr)
        {
            _propStr = propStr;
            _properties = new Dictionary<string, string>();
        }

        private Dictionary<string, string> _properties;
        public string this[string key]
        {
            get
            {
                return _properties.ContainsKey(key) ? _properties[key] : string.Empty;
            }
            set
            {
                if (_properties.ContainsKey(key))
                {
                    _properties[key] = value;
                }
                else
                {
                    _properties.Add(key, value);
                }
            }
        }



        /// <summary>
        /// Replaces properties in the format {{propertyName}} in the source string with values from KeyValuePairPropertiesDictionarysupplied dictionary.nce you've set a property it's replaced in the string and you 
        /// </summary>
        /// <param name="originalStr"></param>
        /// <param name="keyValuePairPropertiesDictionary"></param>
        /// <returns></returns>
        public override string ToString()
        {
            string modifiedStr = _propStr;
            foreach (var keyvaluePair in _properties)
            {
                modifiedStr = modifiedStr.Replace("{{" + keyvaluePair.Key + "}}", keyvaluePair.Value);
            }

            return modifiedStr;
        }
    }