feat: 增加浏览功能

Author: ArgoZhang

src/extensions/BootstrapBlazor.OpcDa/IOpcDaServer.cs

@@ -2,6 +2,8 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 // Website: https://www.blazor.zone or https://argozhang.github.io/
 
+using Opc.Da;
+
 namespace BootstrapBlazor.OpcDa;
 
 /// <summary>
@@ -59,4 +61,20 @@ public interface IOpcDaServer : IDisposable
     /// <param name="items"></param>
     /// <returns></returns>
     HashSet<OpcWriteItem> Write(params HashSet<OpcWriteItem> items);
+
+    /// <summary>
+    /// 浏览 OPC Server 中的位号 (即数据项或者标签)
+    /// </summary>
+    /// <param name="name"></param>
+    /// <param name="filters"></param>
+    /// <param name="position"></param>
+    /// <returns></returns>
+    BrowseElement[] Browser(string name, BrowseFilters filters, out BrowsePosition position);
+
+    /// <summary>
+    /// 浏览 OPC Server 中的位号 (即数据项或者标签)
+    /// </summary>
+    /// <param name="position"></param>
+    /// <returns></returns>
+    BrowseElement[] BrowserNext(ref BrowsePosition position);
 }

src/extensions/BootstrapBlazor.OpcDa/OpcDaServer.cs

@@ -48,6 +48,39 @@ public bool Connect(string serverName)
         return IsConnected;
     }
 
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
+    /// <param name="name"></param>
+    /// <param name="filters"></param>
+    /// <param name="position"></param>
+    /// <returns></returns>
+    public BrowseElement[] Browser(string name, BrowseFilters filters, out BrowsePosition position)
+    {
+        if (_server is not { IsConnected: true })
+        {
+            throw new InvalidOperationException("OPC Server is not connected.");
+        }
+
+        return _server.Browse(new ItemIdentifier(name), filters, out position);
+    }
+
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
+    /// <param name="position"></param>
+    /// <returns></returns>
+    public BrowseElement[] BrowserNext(ref BrowsePosition position)
+    {
+        if (_server is not { IsConnected: true })
+        {
+            throw new InvalidOperationException("OPC Server is not connected.");
+        }
+
+
+        return _server.BrowseNext(ref position);
+    }
+
     /// <summary>
     /// 断开连接方法
     /// </summary>