1、开发规划

Tools/UI/wDBTools.cs

@@ -450,5 +450,45 @@ namespace Tools.UI
             //执行SQL语句
             this._db.ExecNonSql(this._link, sqlist);
         }
+
+
+
+
+        #region 待开发：查询指定表的列与描述信息
+
+        private void SearchColumn(string tableName)
+        {
+
+            string sql = $@"
+                        SELECT  
+		                        表名 = CASE WHEN a.colorder = 1 THEN d.name ELSE '' END, 
+		                        表说明 = CASE WHEN a.colorder = 1 THEN ISNULL(f.value, '') ELSE '' END, 
+		                        字段序号 = a.colorder, 
+		                        字段名 = a.name,
+                                标识 = CASE WHEN COLUMNPROPERTY(a.id, a.name, 'IsIdentity') = 1 THEN '√' ELSE '' END,
+                                主键 = CASE WHEN EXISTS ( SELECT 1 FROM sysobjects WHERE xtype = 'PK' AND parent_obj = a.id  AND name IN ( SELECT name FROM sysindexes WHERE indid IN ( SELECT indid FROM sysindexkeys WHERE   id = a.id AND colid = a.colid ))) THEN '√' ELSE '' END, 
+		                        类型 = b.name, 
+		                        占用字节数 = a.length,
+                                长度 = COLUMNPROPERTY(a.id, a.name, 'PRECISION'),
+                                小数位数 = ISNULL(COLUMNPROPERTY(a.id, a.name, 'Scale'), 0),
+                                允许空 = CASE WHEN a.isnullable = 1 THEN '√' ELSE '' END, 
+		                        默认值 = ISNULL(e.text, ''), 
+		                        字段说明 = ISNULL(g.[value], '')
+                        FROM    syscolumns a
+                        LEFT JOIN systypes b ON a.xusertype = b.xusertype
+                        INNER JOIN sysobjects d ON a.id = d.id AND d.xtype = 'U' AND d.name <> 'dtproperties'
+                        LEFT JOIN syscomments e ON a.cdefault = e.id
+                        LEFT JOIN sys.extended_properties g ON a.id = g.major_id AND a.colid = g.minor_id
+                        LEFT JOIN sys.extended_properties f ON d.id = f.major_id AND f.minor_id = 0
+                        WHERE   d.name = '{tableName}'
+                        ORDER BY a.id, a.colorder;
+                        ";
+
+        }
+
+        #endregion
+        #region 待开发：支持查询后修改指定列的描述和类型列名等
+
+        #endregion
     }
 }