创建了PLC相关的文件

Data/DbContext.cs

@@ -2,7 +2,7 @@
 
 namespace PMSWPF.Data
 {
-    internal class DbContext
+    public class DbContext
     {
         private static SqlSugarClient _db;
 
@@ -10,7 +10,7 @@ namespace PMSWPF.Data
         {
             if (_db == null)
             {
-                string connectionString = "server=127.0.0.1;port=3306;user=root;password=Pgw15221236646; database=PMS;";
+                string connectionString = "server=127.0.0.1;port=3306;user=root;password=Pgw15221236646; database=pmswpf;";
                 _db = new SqlSugarClient(new ConnectionConfig()
                 {
                     ConnectionString = connectionString,