在现代的应用程序中，数据的准确性和UI控件的映射正确性对于提供良好的用户体验至关重要。本文将探讨如何确保数据准确性，并通过映射检查来避免不必要的服务器调用，从而提高应用程序的性能。
在开发一个包含大量图表、网格、地图等UI控件的应用程序时，使用了MDX查询来生成这些控件。众所周知，数据的准确性对于仪表板应用程序至关重要，因为只有准确的数据才能保证图表、网格、地图等UI控件的正确显示。因此，必须检查数据的正确性，并尽量避免不必要的服务器调用以获取数据。
正在执行以下步骤：
现在让开始编码。
以下是AJAX调用实现。
var cubeName = '';
var measureGroupName = '';
var dimensionGroupName = '';
var serverName = 'My server name';
var databaseName = 'My database name';
var cubeName = 'My cube name';
measureGroupName = sessionStorage.getItem("measureGroupName");
dimensionGroupName = sessionStorage.getItem("dimensionGroupName");
var checkMeasuresMapped = {
cubeName: cubeName,
measureGroupName: measureGroupName,
dimensionGroupName: dimensionGroupName,
serverName: serverName,
databaseName: databaseName
};
$.ajax({
async: true,
url: '../CheckMeasureGroupMapping/',
type: 'POST',
dataType: 'json',
data: JSON.stringify(checkMeasuresMapped),
contentType: "application/json; charset=utf-8",
success: function(data) {
if (data.indexOf("Error") > -1) {
$('#btnCreate').css('enabled', 'false');
$('#Preview').html('Error : ' + data.replace('Error', '') + '
');
} else if (data == "Mapped") {
// Condition satisfied, write your codes here
ajaxAsync = true;
} else {
$('#Preview').html('Warning : The given measure is not mapped with the dimension. Please check.
');
}
},
error: function(xhrequest, ErrorText, thrownError) {
console.log(ErrorText + "," + thrownError);
$('#Preview').html('Error : ' + ErrorText + '
');
}
});
请注意，已经传递了所有需要的信息。将列出它们。
现在已经完成了AJAX实现，接下来将进入下一部分。请参阅以下代码。
/// <summary>
/// This method is used to find whether the given measure is mapped to the dimension
/// </summary>
/// <param name="cubeName"></param>
/// <param name="measureGroupName"></param>
/// <param name="dimensionGroupName"></param>
/// </summary>
[HandleError]
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult CheckMeasureGroupMapping(string cubeName, string measureGroupName, string dimensionGroupName, string serverName, string databaseName)
{
try
{
DataTable dt = new DataTable();
dt = adomdConn.CheckMeasureGroupMapping(cubeName, measureGroupName, dimensionGroupName, serverName, databaseName);
if (dt.Rows.Count < 1)
{
return Json("The given measure is not mapped with the dimension. Please check.", JsonRequestBehavior.AllowGet);
}
else
{
return Json("Mapped", JsonRequestBehavior.AllowGet);
}
}
catch (AdomdErrorResponseException ex)
{
string errorText = "Query Error" + System.Web.HttpUtility.HtmlEncode(ex.Message);
return Json(errorText, JsonRequestBehavior.AllowGet);
}
}
在这里，CheckMeasureGroupMapping是ActionResult，将信息传递给模型类，如果条件满足，上述函数将返回数据表中的行。通过该数据表的行数，可以得出结论。
现在在最后一部分，因为在模型类中得到了所需的参数，是时候构建查询并将其运行到ADOMD服务器了。以下是执行此操作的函数。
public DataTable CheckMeasureGroupMapping(string cubeName, string measureGroupName, string dimensionGroupName, string serverName, string databaseName)
{
try
{
string query = string.Empty;
string queryBefore = string.Empty;
queryBefore = "SELECT [MEASUREGROUP_NAME] AS [MEASUREGROUP],[MEASUREGROUP_CARDINALITY],[DIMENSION_UNIQUE_NAME] AS [DIM],[DIMENSION_GRANULARITY] AS [DIM_KEY],[DIMENSION_CARDINALITY],[DIMENSION_IS_VISIBLE] AS [IS_VISIBLE],[DIMENSION_IS_FACT_DIMENSION] AS [IS_FACT_DIM] FROM $system.MDSCHEMA_MEASUREGROUP_DIMENSIONS WHERE [CUBE_NAME] = {cubeName} AND [MEASUREGROUP_NAME] ={measureGroupName} AND [DIMENSION_UNIQUE_NAME]={dimensionGroupName}";
query = queryBefore.Replace("{cubeName}", "'" + cubeName + "'").Replace("{measureGroupName}", "'" + measureGroupName + "'").Replace("{dimensionGroupName}", "'" + dimensionGroupName + "'");
StringBuilder sbConnectionString = new StringBuilder();
sbConnectionString.Append("Provider=MSOLAP;data source=" + serverName + ";initial catalog=" + databaseName + ";Integrated Security=SSPI;Persist Security Info=False;");
using (AdomdConnection conn = new AdomdConnection(sbConnectionString.ToString()))
{
conn.Open();
using (AdomdCommand cmd = new AdomdCommand(query, conn))
{
DataTable dt = new DataTable();
AdomdDataAdapter da = new AdomdDataAdapter(cmd);
da.Fill(dt);
return dt;
}
}
}
catch (AdomdErrorResponseException ex)
{
throw;
}
}
正如大家所看到的，以下是用于查找给定的度量组是否与维度组映射的查询。
SELECT [MEASUREGROUP_NAME] AS [MEASUREGROUP],[MEASUREGROUP_CARDINALITY],[DIMENSION_UNIQUE_NAME] AS [DIM],[DIMENSION_GRANULARITY] AS [DIM_KEY],[DIMENSION_CARDINALITY],[DIMENSION_IS_VISIBLE] AS [IS_VISIBLE],[DIMENSION_IS_FACT_DIMENSION] AS [IS_FACT_DIM] FROM $system.MDSCHEMA_MEASUREGROUP_DIMENSIONS WHERE [CUBE_NAME] = {cubeName} AND [MEASUREGROUP_NAME] ={measureGroupName} AND [DIMENSION_UNIQUE_NAME]={dimensionGroupName}
使用参数运行此查询，并将结果返回给控制器。
最后，将检查在AJAX调用中显示的条件。
if (data.indexOf("Error") > -1) {
$('#btnCreate').css('enabled', 'false');
$('#Preview').html('Error : ' + data.replace('Error', '') + '
');
} else if (data == "Mapped") {
// Condition satisfied, write your codes here
ajaxAsync = true;
} else {
$('#Preview').html('Warning : The given measure is not mapped with the dimension. Please check.
');
}
已经完成了这个需求。
ADOMD, ADOMD Measure, ADOMD Dimension, ADOMD Measure Groups, ADOMD Dimension Group, Mapping measure group and dimension group.
希望喜欢这篇文章。请分享宝贵的反馈。这对来说意义重大。