主题：关于备注数据类型无法作为加载条件问题

对备注型数据作为加载条件出现的错误，load后出现提示如下

此主题相关图片如下：snipaste_2018-02-21_23-10-49.png

在网上找过，基本无解，请求帮助，或是另选一个数据列作为加载条件？

foxtable的备注类型可否为nvarchar(max)，可否将sql数据库中ntext改为nvarchar(max),

Dim str As String = Vars("remote_file")
If str.Length > 0 Then
    DataTables("通用表").LoadFilter = "表格目录 = '" & str & "'"
    DataTables("通用表").Load
End If

将备注转换为varchar时会不会丢失数据？varchar只有255字节

e.form.Controls("TabControl1").Enabled = True
Dim str As String = "1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,256,257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,272,273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290,291,292,293,294,295,296,297,298,299,300,301,302,303,304,305,306,307,308,309,310,311,312,313,314,315,316,317,318,319"
If str.Length > 0 Then
    DataTables("通用单数据表").LoadFilter = "convert(varchar, 表格目录) = '" & str & "'"
    DataTables("通用单数据表").Load
End If

这样试了一下，程序运行把数据库内的此行自动删除了，因为是绑定的数据库，一开始还是有，一运行上述语句就删除了，也没有报错

更正一下，不是删除了，是没有加载

 

数据是文件目录，长度也许很长，文本，查询的目的是用文件的目录作为唯一标识来打开excel表格

用excel表格的目录作为表格的唯一标识，同时就用这个目录数据打开表格，这样在使用列的ftp上传表格后，就查询这列并用这列打开表格，也可使用这列建立关联表，操作foxtable中关联表的数据