C#中使用ADOMD.NET查询多维数据集的实现方法
本文实例讲述了C#中使用ADOMD.NET查询多维数据集的实现方法，分享给大家供大家参考。具体实现方法分析如下：
ADOMD.NET 是用于与 Microsoft SQL Server Analysis Services 进行通信的 Microsoft .NET Framework 数据访问接口。 ADOMD.NET 可使用 XML for Analysis 协议与分析数据源通信，方法为使用 TCP/IP 或 HTTP 连接传输和接收符合 XML for Analysis 规范的 SOAP 请求和响应。 命令可通过多维表达式 (MDX)、数据挖掘扩展插件 (DMX)、Analysis Services 脚本语言 (ASSL) 或者甚至是有限 SQL 语法来发送，并且可能不返回结果。 可以使用 ADOMD.NET 对象模型来查询和操作分析数据、关键绩效指标 (KPI) 和挖掘模型。 使用 ADOMD.NET 时，还可通过检索与 OLE DB 兼容的架构行集或者使用 ADOMD.NET 对象模型来查看和使用元数据。
ADOMD.NET 数据访问接口由 Microsoft.AnalysisServices.AdomdClient 命名空间表示
ADOMD.NET安装包点击此处下载：
实战，连接并查询多维数据集：
AdomdConnection _connection = new AdomdConnection(connectionString);
if (_connection != null)
if (_connection.State == ConnectionState.Closed)
_connection.Open();
AdomdCommand command = _connection.CreateCommand();
StringBuilder sb = new StringBuilder();
sb.Append("WITH");
sb.Append(" MEMBER [Product].[Category].[All Products].[X] AS 1+1");
sb.Append("SELECT{ ([Date].[Calendar].[CY 2002]),([Date].[Calendar].[CY 2003])}*{([Measures].[Reseller Sales Amount]) } ON COLUMNS,");
sb.Append("{ ([Product].[Category].[Accessories]),([Product].[Category].[Bikes]),([Product].[Category].[Clothing]),");
sb.Append("([Product].[Category].[Components]),([Product].[Category].[X])} ON ROWS");
sb.Append(" FROM [Step-by-Step]");
command.CommandText = sb.ToString();
var xmlreader = command.ExecuteXmlReader();
CellSet cellSet = CellSet.LoadXml(xmlreader);
_connection.Close();
var dt = ToDataTable(cellSet);
var v = dt.Rows.Count;
AdomdHelper.cs文件如下：
using System.Data;
using Microsoft.AnalysisServices.AdomdClient;
namespace WpfApplication1
{
/// <summary>
/// Summary description for AdomdHelper.
/// </summary>
public class AdomdHelper
{
#region "== Enum ============================================================"
public enum Versions
{
Server,
Provider,
Client
}
#endregion
#region "== Methods ============================================================"
//判断连接AdomdConnection对象是State是否处于Open状态。
public bool IsConnected(ref AdomdConnection connection)
{
return (!(connection == null)) && (connection.State != ConnectionState.Broken) && (connection.State != ConnectionState.Closed);
}
/// <summary>
/// 断开连接
/// </summary>
/// <param name="connection">AdomdConnection对象的实例</param>
/// <param name="destroyConnection">是否销毁连接</param>
public void Disconnect(ref AdomdConnection connection, bool destroyConnection)
{
try
{
if (!(connection == null))
{
if (connection.State != ConnectionState.Closed)
{
connection.Close();
}
if (destroyConnection == true)
{
connection.Dispose();
connection = null;
}
}
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// 建立连接
/// </summary>
/// <param name="connection">AdomdConnection对象的实例</param>
/// <param name="connectionString">连接字符串</param>
public void Connect(ref AdomdConnection connection, string connectionString)
{
if (connectionString == "")
throw new ArgumentNullException("connectionString", "The connection string is not valid.");
// Ensure an AdomdConnection object exists and that its ConnectionString property is set.
if (connection == null)
connection = new AdomdConnection(connectionString);
else
{
Disconnect(ref connection, false);
connection.ConnectionString = connectionString;
}
try
{
connection.Open();
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// 获取OLAP数据库。
/// </summary>
/// <param name="connection">AdomdConnection对象的实例</param>
/// <param name="connectionString">连接字符串</param>
/// <returns></returns>
public DataTable GetSchemaDataSet_Catalogs(ref AdomdConnection connection, string connectionString)
{
bool connected = true; //判断connection在调用此函数时，是否已经处于连接状态
DataTable objTable = new DataTable();
try
{
// Check if a valid connection was provided.
if (IsConnected(ref connection) == false)
{
//如果连接不存在，则建立连接
Connect(ref connection, connectionString);
connected = false; //更改connection为未连接状态。
}
objTable = connection.GetSchemaDataSet(AdomdSchemaGuid.Catalogs, null).Tables[0];
if (connected == false)
{
//关闭连接
Disconnect(ref connection, false);
}
}
catch (Exception err)
{
throw err;
}
return objTable;
}
/// <summary>
/// 通过SchemaDataSet的方式获取立方体
/// </summary>
/// <param name="connection">AdomdConnection对象的实例</param>
/// <param name="connectionString">连接字符串</param>
/// <returns></returns>
public string[] GetSchemaDataSet_Cubes(ref AdomdConnection connection, string connectionString)
{
string[] strCubes = null;
bool connected = true; //判断connection是否已与数据库连接
DataTable objTable = new DataTable();
if (IsConnected(ref connection) == false)
{
try
{
Connect(ref connection, connectionString);
connected = false;
}
catch (Exception err)
{
throw err;
}
}
string[] strRestriction = new string[] { null, null, null };
objTable = connection.GetSchemaDataSet(AdomdSchemaGuid.Cubes, strRestriction).Tables[0];
if (connected == false)
{
Disconnect(ref connection, false);
}
strCubes = new string[objTable.Rows.Count];
int rowcount = 0;
foreach (DataRow tempRow in objTable.Rows)
{
strCubes[rowcount] = tempRow["CUBE_NAME"].ToString();
rowcount++;
}
return strCubes;
}
/// <summary>
/// 通过SchemaDataSet的方式获取制定立方体的维度
/// </summary>
/// <param name="connection">AdomdConnection对象的实例</param>
/// <param name="connectionString">连接字符串</param>
/// <returns></returns>
public string[] GetSchemaDataSet_Dimensions(ref AdomdConnection connection, string connectionString, string cubeName)
{
string[] strDimensions = null;
bool connected = true; //判断connection是否已与数据库连接
DataTable objTable = new DataTable();
if (IsConnected(ref connection) == false)
{
try
{
Connect(ref connection, connectionString);
connected = false;
}
catch (Exception err)
{
throw err;
}
}
string[] strRestriction = new string[] { null, null, cubeName, null, null };
objTable = connection.GetSchemaDataSet(AdomdSchemaGuid.Dimensions, strRestriction).Tables[0];
if (connected == false)
{
Disconnect(ref connection, false);
}
strDimensions = new string[objTable.Rows.Count];
int rowcount = 0;
foreach (DataRow tempRow in objTable.Rows)
{
strDimensions[rowcount] = tempRow["DIMENSION_NAME"].ToString();
rowcount++;
}
return strDimensions;
}
/// <summary>
/// 以connection的方式获取立方体
/// </summary>
/// <param name="connection">AdomdConnection对象的实例</param>
/// <param name="connectionString">连接字符串</param>
/// <returns></returns>
public string[] GetCubes(ref AdomdConnection connection, string connectionString)
{
string[] strCubesName = null;
bool connected = true; //判断connection是否已与数据库连接
if (IsConnected(ref connection) == false)
{
try
{
Connect(ref connection, connection.ConnectionString);
connected = false;
}
catch (Exception err)
{
throw err;
}
}
int rowcount = connection.Cubes.Count;
strCubesName = new string[rowcount];
for (int i = 0; i < rowcount; i++)
{
strCubesName[i] = connection.Cubes[i].Caption;
}
if (connected == false)
{
Disconnect(ref connection, false);
}
return strCubesName;
}
/// <summary>
/// 获取立方体的维度
/// </summary>
/// <param name="connection">AdomdConnection对象的实例</param>
/// <param name="connectionString">连接字符串</param>
/// <param name="CubeName">立方体名称</param>
/// <returns></returns>
public string[] GetDimensions(ref AdomdConnection connection, string connectionString, string CubeName)
{
string[] strDimensions = null;
bool connected = true;
if (IsConnected(ref connection) == false)
{
try
{
Connect(ref connection, connection.ConnectionString);
connected = false;
}
catch (Exception err)
{
throw err;
}
}
int rowcount = connection.Cubes[CubeName].Dimensions.Count;
strDimensions = new string[rowcount];
for (int i = 0; i < rowcount; i++)
{
strDimensions[i] = connection.Cubes[CubeName].Dimensions[i].Caption.ToString();
}
if (connected == false)
{
Disconnect(ref connection, false);
}
return strDimensions;
}
#endregion
}
}
完整实例代码点击此处本站下载。
希望本文所述对大家的C#程序设计有所帮助。
相关文章
这篇文章主要介绍了C#使用ML.Net完成人工智能预测的详细教程，本文给大家介绍的非常详细，对大家的学习或工作具有一定的参考借鉴价值,需要的朋友可以参考下2020-12-12
这篇文章主要为大家详细介绍了C#实现简单的计算器小程序，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下2022-01-01
我们给大家总计了C#中判断英文单词个数的方法以及排序的技巧，对此有需要的朋友可以测试下。2018-03-03
这篇文章主要为大家详细介绍了Unity实现角色受击身体边缘发光特效，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下2020-04-04
这篇文章主要为大家详细介绍了C#使用FileStream对象读写文件，具有一定的参考价值，感兴趣的小伙伴们可以参考一下2019-05-05
这篇文章主要介绍了如何利用WPF实现路径图标控件，文中的示例代码讲解详细，对我们学习或工作有一定帮助，需要的小伙伴可以参考一下2023-07-07
这篇文章主要为大家详细介绍了如何使用C#实现将Word 转文本存储到数据库并进行管理,文中的示例代码讲解详细,需要的小伙伴可以参考一下2024-03-03
本文主要介绍了C#调用C++的基本规则和方法,包括内存对齐、调用约定、基本数据类型的传递、结构体的传递以及数组的传递等,感兴趣的可以了解一下2024-11-11
这篇文章主要介绍了c# 托管和非托管资源的相关资料，文中讲解非常细致，帮助大家更好的理解和学习，感兴趣的朋友可以了解下2020-07-07
最近在网上看到了新版的360安全卫士，感觉界面还不错，于是用WPF制作了一个，时间有限，一些具体的控件没有制作，用图片代替了。感兴趣的朋友一起跟着小编学习WPF实现类似360安全卫士界面的程序源码分享2015-09-09
最新评论