Add property FbCommand.NamedParameters (#1161) (#1168)

Co-authored-by: Daniel Trubač <trubacd@elektlabs.cz>

Author: dant02

src/FirebirdSql.Data.FirebirdClient.Tests/FbCommandTests.cs

@@ -187,6 +187,22 @@ public async Task NamedParametersReuseTest()
 		}
 	}
 
+	[Test]
+	public async Task NamedParametersPublicAccessor()
+	{
+		await using (var command = new FbCommand("select * from test where int_field >= @x1 and int_field <= @x2", Connection))
+		{
+			Assert.IsNotNull(command.NamedParameters, "Unexpected null reference.");
+			Assert.IsTrue(command.NamedParameters.Count == 0, "Expected count 0 of named parameters before command prepare.");
+
+			await command.PrepareAsync();
+
+			Assert.IsTrue(command.NamedParameters.Count == 2, "Expected count 2 of named parameters after command prepare.");
+			Assert.AreEqual(command.NamedParameters[0], "@x1");
+			Assert.AreEqual(command.NamedParameters[1], "@x2");
+		}
+	}
+
 	[Test]
 	public async Task ExecuteStoredProcTest()
 	{

src/FirebirdSql.Data.FirebirdClient/FirebirdClient/FbBatchCommand.cs

@@ -192,6 +192,16 @@ public int BatchBufferSize
 		}
 	}
 
+	/// <summary>
+	/// Gets collection of parameters parsed from the query text during command prepare.
+	/// </summary>
+	[Browsable(false)]
+	[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+	public IReadOnlyList<string> NamedParameters
+	{
+		get { return _namedParameters; }
+	}
+
 	#endregion
 
 	#region Internal Properties

src/FirebirdSql.Data.FirebirdClient/FirebirdClient/FbCommand.cs

@@ -198,6 +198,16 @@ public int FetchSize
 		}
 	}
 
+	/// <summary>
+	/// Gets collection of parameters parsed from the query text during command prepare.
+	/// </summary>
+	[Browsable(false)]
+	[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+	public IReadOnlyList<string> NamedParameters
+	{
+		get { return _namedParameters; }
+	}
+
 	#endregion
 
 	#region Protected DbCommand Properties