字段可为空的类型转换和生成类代码调整

Tools/UI/wAutoClass.cs

@@ -94,16 +94,30 @@ namespace Tools.UI
         {
             GenerateEntity();
         }
-        private string GetCsharpTypeNameBySqlType(string nSqlTypeName)
+        private string GetCsharpTypeNameBySqlType(string nSqlTypeName, bool isnull)
         {
             switch (nSqlTypeName)
             {
-                case "image": return "Image";
-                case "int": return "int";
-                case "datetime": return "DateTime?";
-                case "bit": return "bool";
-                case "varchar": return "string";
-                case "char": return "char";
+                case "image": return isnull ? "image?" : "image";
+
+                case "int": return isnull ? "int?" : "int";
+                case "bigint": return isnull ? "long?" : "long";
+                case "float": return isnull ? "float?" : "float";
+                case "decimal": return isnull ? "decimal?" : "decimal";
+
+                case "datetime": return isnull ? "DateTime?" : "DateTime";
+                case "bit": return isnull ? "bool?" : "bool";
+
+                case "char":
+                case "varchar":
+                case "nvarchar":
+                case "text":
+                case "ntext":
+                    return "string";
+
+                case "uniqueidentifier":
+                    return isnull ? "Guid?" : "Guid";
+
                 default: return "string";
             }
         }
@@ -118,11 +132,11 @@ namespace Tools.UI
         /// </summary>
         private void GenerateEntity()
         {
-            if (lsbTableInfo.SelectedItem==null) return;
+            if (lsbTableInfo.SelectedItem == null) return;
             string strTableName = lsbTableInfo.SelectedItem.ToString();
 
             StringBuilder sb = new StringBuilder();
-            sb.AppendLine($@"SELECT b.name, b.user_type_id, c.name AS TypeName, ISNULL(d.value, b.name) AS Description
+            sb.AppendLine($@"SELECT b.name, b.user_type_id, c.name AS TypeName, ISNULL(d.value, b.name) AS Description, b.is_nullable
   FROM sys.objects a
   INNER JOIN sys.columns b ON b.object_id = a.object_id
   INNER JOIN sys.types c ON b.user_type_id = c.user_type_id
@@ -137,46 +151,40 @@ ORDER  BY b.column_id;
             //生成前端列名
             if (chkFrontendcolumn.Checked)
             {
-                sb.Append($@"
-Colums: 
-[
-");
+                sb.AppendLine("Colums:");
+                sb.AppendLine("[");
                 foreach (DataRow row in dataTable.Rows)
                 {
-                    sb.Append($@"
-        {{
-          label: '{row["Description"]}',
-          value: '{row["name"]}',
-          show_overflow_tooltip: true
-        }},");
+                    sb.AppendLine("        {");
+                    sb.AppendLine($"          label: '{row["Description"]}',");
+                    sb.AppendLine($"          value: '{row["name"]}',");
+                    sb.AppendLine($"          show_overflow_tooltip: true");
+                    sb.AppendLine("        },");
                 }
                 txtResult.Text = sb.ToString().Substring(0, sb.ToString().Length - 1) + @"
 ]";
             }
             else//生成实体类
             {
-                sb.Append($@"
-    /// <summary>
-    /// {strTableName}
-    /// </summary>
-    public class {strTableName}
-    {{
-");
+                sb.AppendLine("    /// <summary>");
+                sb.AppendLine($"    /// {strTableName}");
+                sb.AppendLine("    /// </summary>");
+                sb.AppendLine($"    public class {strTableName}");
+                sb.AppendLine("    {");               
+
                 foreach (DataRow row in dataTable.Rows)
                 {
-                    sb.Append($@"        
-        /// <summary>
-        /// {row["Description"]}
-        /// </summary>
-        public {GetCsharpTypeNameBySqlType(row["TypeName"].ToString())} {row["name"]} {{ get; set; }}
-");
+                    sb.AppendLine($@"        /// <summary>");
+                    sb.AppendLine($@"        /// {row["Description"]}");
+                    sb.AppendLine($@"        /// </summary>");
+
+                    sb.AppendLine($"        public {GetCsharpTypeNameBySqlType(row["TypeName"].ToString(), (bool)row["is_nullable"])} {row["name"]} {{ get; set; }}");
+                    sb.AppendLine();
                 }
                 
-                sb.Append($@"
-    }}
-");
+                sb.AppendLine("    }");                 
                 txtResult.Text = sb.ToString();
             }
         }
         }
-}
+    }