70 lines
2.5 KiB
C#
70 lines
2.5 KiB
C#
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//-----------------------------------------------------------------------
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// <copyright file="TableIndexInfoEnumerator.cs" company="Microsoft Corporation">
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// Copyright (c) Microsoft Corporation.
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// </copyright>
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//-----------------------------------------------------------------------
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namespace Microsoft.Isam.Esent.Interop
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{
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/// <summary>
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/// Enumerate columns in a table specified by dbid and name.
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/// </summary>
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internal sealed class TableIndexInfoEnumerator : IndexInfoEnumerator
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{
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/// <summary>
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/// The database containing the table.
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/// </summary>
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private readonly JET_DBID dbid;
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/// <summary>
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/// The name of the table.
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/// </summary>
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private readonly string tablename;
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/// <summary>
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/// Initializes a new instance of the <see cref="TableIndexInfoEnumerator"/> class.
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/// </summary>
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/// <param name="sesid">
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/// The session to use.
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/// </param>
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/// <param name="dbid">
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/// The database containing the table.
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/// </param>
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/// <param name="tablename">
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/// The name of the table.
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/// </param>
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public TableIndexInfoEnumerator(JET_SESID sesid, JET_DBID dbid, string tablename)
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: base(sesid)
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{
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this.dbid = dbid;
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this.tablename = tablename;
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}
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/// <summary>
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/// Open the table to be enumerated. This should set <see cref="TableEnumerator{T}.TableidToEnumerate"/>.
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/// </summary>
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protected override void OpenTable()
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{
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JET_INDEXLIST indexlist;
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Api.JetGetIndexInfo(this.Sesid, this.dbid, this.tablename, string.Empty, out indexlist, JET_IdxInfo.List);
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this.Indexlist = indexlist;
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this.TableidToEnumerate = this.Indexlist.tableid;
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}
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/// <summary>
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/// Retrieves information about indexes on a table.
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/// </summary>
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/// <param name="sesid">The session to use.</param>
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/// <param name="indexname">The name of the index.</param>
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/// <param name="result">Filled in with information about indexes on the table.</param>
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/// <param name="infoLevel">The type of information to retrieve.</param>
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protected override void GetIndexInfo(
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JET_SESID sesid,
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string indexname,
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out string result,
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JET_IdxInfo infoLevel)
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{
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Api.JetGetIndexInfo(sesid, this.dbid, this.tablename, indexname, out result, infoLevel);
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}
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}
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}
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