1、表生成工具：修复Varchar(max)显示异常问题

Tools/UI/wDBTableDevelopTools.cs

@@ -589,7 +589,7 @@ namespace Tools.UI
                         [Description] = CONVERT(VARCHAR(200), isnull(d.[value],'')),
 	                    IsNotNull = CASE WHEN a.isnullable=1 THEN 0 ELSE 1 END,
 	                    DefaultValue = CASE WHEN e.name='datetime' THEN STUFF(STUFF(c.text, LEN(c.text), 1, ''), 1, 1, '') ELSE REPLACE(REPLACE(c.text, '(', ''), ')', '') END,
-	                    ColumnType = CASE WHEN CHARINDEX('varchar',e.name,0) > 0 THEN e.name+'('+CAST(a.length AS VARCHAR(50)) +')' 
+	                    ColumnType = CASE WHEN CHARINDEX('varchar',e.name,0) > 0 THEN e.name+'('+CASE WHEN a.length > -1 THEN CAST(a.length AS VARCHAR(10)) ELSE 'max' END +')' 
                                                  WHEN CHARINDEX('decimal',e.name,0) > 0 THEN e.name + '(' + CAST(a.prec AS VARCHAR(10)) + ',' + CAST(a.scale AS VARCHAR(10)) + ')' ELSE e.name END
                     FROM dbo.syscolumns a
                     INNER JOIN dbo.sysobjects b ON b.id = a.id AND b.xtype = 'U' AND b.name <> 'dtproperties'