Dynamics CRM 2015/2016新特性之二十二：使用Web API更新和删除记录

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先说更新记录的多个字段的值的方法，示例代码如下：

function ConvertStringToDatetime(dateString) {
    var reggie = /(d{4})-(d{2})-(d{2})T(d{2}):(d{2}):(d{2})Z/;
    var dateArray = reggie.exec(dateString);
    var dateObject = new Date(
        (+dateArray[1]),
        (+dateArray[2]) - 1,
        (+dateArray[3]),
        (+dateArray[4]),
        (+dateArray[5]),
        (+dateArray[6])
    );
    return dateObject;
}

function NameOnchangeHandler() {
    var clientURL = Xrm.Page.context.getClientUrl();
    var req = new XMLHttpRequest();
    req.open("PATCH", encodeURI(clientURL + "/api/data/v8.0/ly_tests(77A783FE-4EB3-E511-80D9-000D3A404231)"), true);
    req.setRequestHeader("Accept", "application/json");
    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
    req.setRequestHeader("OData-MaxVersion", "4.0");
    req.setRequestHeader("OData-Version", "4.0");
    req.onreadystatechange = function () {
        if (this.readyState == 4 /* complete */) {
            req.onreadystatechange = null;
            if (this.status == 204) {
                Xrm.Utility.alertDialog("记录修改成功!")
            }
            else {
                var error = JSON.parse(this.response).error;
                Xrm.Utility.alertDialog("修改罗勇测试实体记录出错." + error.message);
            }
        }
    };
    var test = {};
    test.ly_name = "单行文本";//单行文本
    test.ly_alternatekey = "13926492292";//单行文本
    test.ly_bool = true;//两个选项
    test.ly_datetime = ConvertStringToDatetime('2016-01-07T11:22:30Z');//日期和时间,需要将UTC时间转换为本地时间
    test.ly_decimal = 10.01;//十进制数
    test.ly_float = 10.02//浮点数
    test["ly_Lookup@odata.bind"] = "/accounts(CE23165A-3AA3-E511-80C7-000D3A807EC7)"//查找字段,注意去/api/data/v8.0/$metadata页面查看关系的Partner属性的值
    test.ly_integer = 10;//整数
    test.ly_money = 10.03;//货币
    test.ly_multilinetext = "多行文本";//多行文本
    test.ly_optionset = 364750000;//选项集
    test.ly_singlelinetext = "单行文本";//单行文本
    req.send(JSON.stringify(test));
}

 

再说说更新一个字段的方法，这个有简便形式，注意http请求的动作是PUT了。

function NameOnchangeHandler() {
    var clientURL = Xrm.Page.context.getClientUrl();
    var req = new XMLHttpRequest()
    req.open("PUT", encodeURI(clientURL + "/api/data/v8.0/ly_tests(77A783FE-4EB3-E511-80D9-000D3A404231)/ly_name"), true);
    req.setRequestHeader("Accept", "application/json");
    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
    req.setRequestHeader("OData-MaxVersion", "4.0");
    req.setRequestHeader("OData-Version", "4.0");
    req.onreadystatechange = function () {
        if (this.readyState == 4 /* complete */) {
            req.onreadystatechange = null;
            if (this.status == 204) {
                Xrm.Utility.alertDialog("记录修改成功!")
            }
            else {
                var error = JSON.parse(this.response).error;
                Xrm.Utility.alertDialog("修改罗勇测试实体记录出错." + error.message);
            }
        }
    };
    var updateValue = { "value": "来自罗勇的问候!" };
    req.send(JSON.stringify(updateValue));
}

下面是将记录的字段值赋值为NULL (空值)的方法：

var clientURL = Xrm.Page.context.getClientUrl();
var req = new XMLHttpRequest()
req.open("DELETE", encodeURI(clientURL + "/api/data/v8.0/ly_tests(77A783FE-4EB3-E511-80D9-000D3A404231)/ly_decimal"), true);
req.setRequestHeader("Accept", "application/json");
req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
req.setRequestHeader("OData-MaxVersion", "4.0");
req.setRequestHeader("OData-Version", "4.0");
req.onreadystatechange = function () {
    if (this.readyState == 4 /* complete */) {
        req.onreadystatechange = null;
        if (this.status == 204) {
            Xrm.Utility.alertDialog("记录修改成功!")
        }
        else {
            var error = JSON.parse(this.response).error;
            Xrm.Utility.alertDialog("修改罗勇测试实体记录出错." + error.message);
        }
    }
};
req.send();

 

下面是删除记录的示例代码：

var clientURL = Xrm.Page.context.getClientUrl();
var req = new XMLHttpRequest()
req.open("DELETE", encodeURI(clientURL + "/api/data/v8.0/ly_tests(77A783FE-4EB3-E511-80D9-000D3A404231)"), true);
req.setRequestHeader("Accept", "application/json");
req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
req.setRequestHeader("OData-MaxVersion", "4.0");
req.setRequestHeader("OData-Version", "4.0");
req.onreadystatechange = function () {
    if (this.readyState == 4 /* complete */) {
        req.onreadystatechange = null;
        if (this.status == 204) {
            Xrm.Utility.alertDialog("记录删除成功!");
        }
        else if (this.status == 404) {
            Xrm.Utility.alertDialog("要删除的记录不存在!")
        }
        else {
            var error = JSON.parse(this.response).error;
            Xrm.Utility.alertDialog("修改罗勇测试实体记录出错." + error.message);
        }
    }
};
req.send();

注意，对于可能包括小数的字段，比如十进制数，货币等，如果你赋予整数的话，比如赋予100，会导致出错。错误信息通常是：Incorrect attribute value type System.Int32 . 或者 The property provided was of type System.Int32, when the expected was of type System.Decimal 。我这里提供的解决办法很很简单，就是设置的值加上 0.00001 ，这个对你要设置的值大小没有影响，我查过数据库，但是又能让系统认为你传递过去的数据是正确的类型。示例是：{ "value": 200 + 0.00001 } 。

从Dynamics 365 V9版本开始提供了新的API来方便客户端编程，具体请参考官方文档：updateRecord (Client API reference) 和 deleteRecord (Client API reference) 。

更多信息请参考官方文档：Update and delete entities using the Web API 。