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Added ability to return DynamicCachedReader from DB and convert it to DataTable

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grzegorz.russek
2023-02-22 13:25:47 +00:00
parent 23c0da2ac8
commit 9e0f315b24
5 changed files with 340 additions and 2 deletions
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166
AmalgamationTool/DynamORM.Amalgamation.cs
View File

@@ -96,6 +96,95 @@ namespace DynamORM
#region Helpers
/// <summary>Create data reader from dynamic enumerable.</summary>
/// <param name="objects">List of objects.</param>
/// <returns>Instance of <see cref="DynamicCachedReader"/> containing objects data.</returns>
public static DynamicCachedReader FromDynamicEnumerable(IEnumerable<dynamic> objects)
{
var first = (objects as IEnumerable<dynamic>).FirstOrDefault();
if (first == null)
return null;
var firstDict = first as IDictionary<string, object>;
var r = new DynamicCachedReader();
r.Init(firstDict.Keys.Count);
for (int i = 0; i < firstDict.Keys.Count; i++)
r._types.Add(null);
foreach (dynamic elem in (objects as IEnumerable<dynamic>))
{
int c = 0;
var dict = elem as IDictionary<string, object>;
foreach (var k in firstDict.Keys)
{
object val = dict[k];
r._cache.Add(val);
if (r._types[c] == null && val != null)
r._types[c] = val.GetType();
c++;
}
r._rows++;
}
for (int i = 0; i < firstDict.Keys.Count; i++)
if (r._types[i] == null)
r._types[i] = typeof(string);
r._schema = new DataTable("DYNAMIC");
r._schema.Columns.Add(new DataColumn("ColumnName", typeof(string)));
r._schema.Columns.Add(new DataColumn("ColumnOrdinal", typeof(int)));
r._schema.Columns.Add(new DataColumn("ColumnSize", typeof(int)));
r._schema.Columns.Add(new DataColumn("NumericPrecision", typeof(short)));
r._schema.Columns.Add(new DataColumn("NumericScale", typeof(short)));
r._schema.Columns.Add(new DataColumn("DataType", typeof(Type)));
r._schema.Columns.Add(new DataColumn("ProviderType", typeof(int)));
r._schema.Columns.Add(new DataColumn("NativeType", typeof(int)));
r._schema.Columns.Add(new DataColumn("AllowDBNull", typeof(bool)));
r._schema.Columns.Add(new DataColumn("IsUnique", typeof(bool)));
r._schema.Columns.Add(new DataColumn("IsKey", typeof(bool)));
r._schema.Columns.Add(new DataColumn("IsAutoIncrement", typeof(bool)));
int ordinal = 0;
DataRow dr = null;
foreach (var column in firstDict.Keys)
{
dr = r._schema.NewRow();
dr[0] = column;
dr[1] = ordinal;
dr[2] = 0;
dr[3] = 0;
dr[4] = 0;
dr[5] = r._types[ordinal];
dr[6] = r._types[ordinal].ToDbType();
dr[7] = r._types[ordinal].ToDbType();
dr[8] = true;
dr[9] = false;
dr[10] = false;
dr[11] = false;
r._schema.Rows.Add(dr);
r._names.Add(dr[0].ToString());
r._ordinals.Add(dr[0].ToString().ToUpper(), ordinal++);
r._types.Add((Type)dr[5]);
dr.AcceptChanges();
}
dr.AcceptChanges();
return r;
}
/// <summary>Create data reader from enumerable.</summary>
/// <typeparam name="T">Type of enumerated objects.</typeparam>
/// <param name="objects">List of objects.</param>
@@ -2773,6 +2862,44 @@ namespace DynamORM
#endregion Query
#region CachedQuery
/// <summary>Enumerate the reader and yield the result.</summary>
/// <param name="sql">SQL query containing numbered parameters in format provided by
/// <see cref="DynamicDatabase.GetParameterName(object)"/> methods. Also names should be formatted with
/// <see cref="DynamicDatabase.DecorateName(string)"/> method.</param>
/// <param name="args">Arguments (parameters).</param>
/// <returns>Enumerator of objects expanded from query.</returns>
public virtual DynamicCachedReader CachedQuery(string sql, params object[] args)
{
using (IDbConnection con = Open())
using (IDbCommand cmd = con.CreateCommand())
{
using (IDataReader rdr = cmd
.SetCommand(sql)
.AddParameters(this, args)
.ExecuteReader())
return new DynamicCachedReader(rdr);
}
}
/// <summary>Enumerate the reader and yield the result.</summary>
/// <param name="builder">Command builder.</param>
/// <returns>Enumerator of objects expanded from query.</returns>
public virtual DynamicCachedReader CachedQuery(IDynamicQueryBuilder builder)
{
using (IDbConnection con = Open())
using (IDbCommand cmd = con.CreateCommand())
{
using (IDataReader rdr = cmd
.SetCommand(builder)
.ExecuteReader())
return new DynamicCachedReader(rdr);
}
}
#endregion Query
#region Schema
/// <summary>Builds query cache if necessary and returns it.</summary>
@@ -10855,6 +10982,45 @@ namespace DynamORM
}
}
/// <summary>Extensions for data reader handling.</summary>
public static class DataReaderExtensions
{
/// <summary>Gets the data table from data reader.</summary>
/// <param name="r">The data reader.</param>
/// <param name="name">The name to give the table. If tableName is null or an empty string, a default name is given when added to the System.Data.DataTableCollection.</param>
/// <param name="nameSpace">The namespace for the XML representation of the data stored in the DataTable.</param>
/// <returns></returns>
public static DataTable GetDataTableFromDataReader(this IDataReader r, string name = null, string nameSpace = null)
{
DataTable schemaTable = r.GetSchemaTable();
DataTable resultTable = new DataTable(name, nameSpace);
foreach (DataRow col in schemaTable.Rows)
{
dynamic c = col.RowToDynamicUpper();
DataColumn dataColumn = new DataColumn();
dataColumn.ColumnName = c.COLUMNNAME;
dataColumn.DataType = (Type)c.DATATYPE;
dataColumn.ReadOnly = true;
dataColumn.Unique = c.ISUNIQUE;
resultTable.Columns.Add(dataColumn);
}
while (r.Read())
{
DataRow row = resultTable.NewRow();
for (int i = 0; i < resultTable.Columns.Count - 1; i++)
row[i] = r[i];
resultTable.Rows.Add(row);
}
return resultTable;
}
}
/// <summary>Framework detection and specific implementations.</summary>
public static class FrameworkTools
{

4
DynamORM/DynamORM.csproj
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@@ -3,10 +3,10 @@
<PropertyGroup>
<TargetFrameworks>netstandard2.0;net472;net5.0;net6.0</TargetFrameworks>
<Description>Dynamic Object-Relational Mapping library.</Description>
<Copyright>Copyright © RUSSEK Software 2012-2022</Copyright>
<Copyright>Copyright © RUSSEK Software 2012-2023</Copyright>
<Company>RUSSEK Software</Company>
<Authors>Grzegorz Russek</Authors>
<VersionPrefix>1.2.4</VersionPrefix>
<VersionPrefix>1.2.5</VersionPrefix>
<RepositoryUrl>https://svn.dr4cul4.pl/svn/DynamORM/</RepositoryUrl>
<PackageProjectUrl>https://dr4cul4.pl</PackageProjectUrl>
<Product>DynamORM</Product>

90
DynamORM/DynamicCachedReader.cs
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@@ -4,6 +4,7 @@ using System.Collections.Generic;
using System.Data;
using System.Dynamic;
using System.IO;
using System.Linq;
using DynamORM.Helpers;
using DynamORM.Mapper;
@@ -43,6 +44,95 @@ namespace DynamORM
#region Helpers
/// <summary>Create data reader from dynamic enumerable.</summary>
/// <param name="objects">List of objects.</param>
/// <returns>Instance of <see cref="DynamicCachedReader"/> containing objects data.</returns>
public static DynamicCachedReader FromDynamicEnumerable(IEnumerable<dynamic> objects)
{
var first = (objects as IEnumerable<dynamic>).FirstOrDefault();
if (first == null)
return null;
var firstDict = first as IDictionary<string, object>;
var r = new DynamicCachedReader();
r.Init(firstDict.Keys.Count);
for (int i = 0; i < firstDict.Keys.Count; i++)
r._types.Add(null);
foreach (dynamic elem in (objects as IEnumerable<dynamic>))
{
int c = 0;
var dict = elem as IDictionary<string, object>;
foreach (var k in firstDict.Keys)
{
object val = dict[k];
r._cache.Add(val);
if (r._types[c] == null && val != null)
r._types[c] = val.GetType();
c++;
}
r._rows++;
}
for (int i = 0; i < firstDict.Keys.Count; i++)
if (r._types[i] == null)
r._types[i] = typeof(string);
r._schema = new DataTable("DYNAMIC");
r._schema.Columns.Add(new DataColumn("ColumnName", typeof(string)));
r._schema.Columns.Add(new DataColumn("ColumnOrdinal", typeof(int)));
r._schema.Columns.Add(new DataColumn("ColumnSize", typeof(int)));
r._schema.Columns.Add(new DataColumn("NumericPrecision", typeof(short)));
r._schema.Columns.Add(new DataColumn("NumericScale", typeof(short)));
r._schema.Columns.Add(new DataColumn("DataType", typeof(Type)));
r._schema.Columns.Add(new DataColumn("ProviderType", typeof(int)));
r._schema.Columns.Add(new DataColumn("NativeType", typeof(int)));
r._schema.Columns.Add(new DataColumn("AllowDBNull", typeof(bool)));
r._schema.Columns.Add(new DataColumn("IsUnique", typeof(bool)));
r._schema.Columns.Add(new DataColumn("IsKey", typeof(bool)));
r._schema.Columns.Add(new DataColumn("IsAutoIncrement", typeof(bool)));
int ordinal = 0;
DataRow dr = null;
foreach (var column in firstDict.Keys)
{
dr = r._schema.NewRow();
dr[0] = column;
dr[1] = ordinal;
dr[2] = 0;
dr[3] = 0;
dr[4] = 0;
dr[5] = r._types[ordinal];
dr[6] = r._types[ordinal].ToDbType();
dr[7] = r._types[ordinal].ToDbType();
dr[8] = true;
dr[9] = false;
dr[10] = false;
dr[11] = false;
r._schema.Rows.Add(dr);
r._names.Add(dr[0].ToString());
r._ordinals.Add(dr[0].ToString().ToUpper(), ordinal++);
r._types.Add((Type)dr[5]);
dr.AcceptChanges();
}
dr.AcceptChanges();
return r;
}
/// <summary>Create data reader from enumerable.</summary>
/// <typeparam name="T">Type of enumerated objects.</typeparam>
/// <param name="objects">List of objects.</param>

38
DynamORM/DynamicDatabase.cs
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@@ -1310,6 +1310,44 @@ namespace DynamORM
#endregion Query
#region CachedQuery
/// <summary>Enumerate the reader and yield the result.</summary>
/// <param name="sql">SQL query containing numbered parameters in format provided by
/// <see cref="DynamicDatabase.GetParameterName(object)"/> methods. Also names should be formatted with
/// <see cref="DynamicDatabase.DecorateName(string)"/> method.</param>
/// <param name="args">Arguments (parameters).</param>
/// <returns>Enumerator of objects expanded from query.</returns>
public virtual DynamicCachedReader CachedQuery(string sql, params object[] args)
{
using (IDbConnection con = Open())
using (IDbCommand cmd = con.CreateCommand())
{
using (IDataReader rdr = cmd
.SetCommand(sql)
.AddParameters(this, args)
.ExecuteReader())
return new DynamicCachedReader(rdr);
}
}
/// <summary>Enumerate the reader and yield the result.</summary>
/// <param name="builder">Command builder.</param>
/// <returns>Enumerator of objects expanded from query.</returns>
public virtual DynamicCachedReader CachedQuery(IDynamicQueryBuilder builder)
{
using (IDbConnection con = Open())
using (IDbCommand cmd = con.CreateCommand())
{
using (IDataReader rdr = cmd
.SetCommand(builder)
.ExecuteReader())
return new DynamicCachedReader(rdr);
}
}
#endregion Query
#region Schema
/// <summary>Builds query cache if necessary and returns it.</summary>

44
DynamORM/Helpers/DataReaderExtensions.cs Normal file
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@@ -0,0 +1,44 @@
using System;
using System.Data;
namespace DynamORM.Helpers
{
/// <summary>Extensions for data reader handling.</summary>
public static class DataReaderExtensions
{
/// <summary>Gets the data table from data reader.</summary>
/// <param name="r">The data reader.</param>
/// <param name="name">The name to give the table. If tableName is null or an empty string, a default name is given when added to the System.Data.DataTableCollection.</param>
/// <param name="nameSpace">The namespace for the XML representation of the data stored in the DataTable.</param>
/// <returns></returns>
public static DataTable GetDataTableFromDataReader(this IDataReader r, string name = null, string nameSpace = null)
{
DataTable schemaTable = r.GetSchemaTable();
DataTable resultTable = new DataTable(name, nameSpace);
foreach (DataRow col in schemaTable.Rows)
{
dynamic c = col.RowToDynamicUpper();
DataColumn dataColumn = new DataColumn();
dataColumn.ColumnName = c.COLUMNNAME;
dataColumn.DataType = (Type)c.DATATYPE;
dataColumn.ReadOnly = true;
dataColumn.Unique = c.ISUNIQUE;
resultTable.Columns.Add(dataColumn);
}
while (r.Read())
{
DataRow row = resultTable.NewRow();
for (int i = 0; i < resultTable.Columns.Count - 1; i++)
row[i] = r[i];
resultTable.Rows.Add(row);
}
return resultTable;
}
}
}