插入到dbf文件不接受空值

我有一個dbf文件，我想執行查詢。這是我的代碼（.NET 4.0，C＃Windows窗體）：插入到dbf文件不接受空值

oconn.ConnectionString = "Provider=vfpoledb.1;Data Source=" + path + ";Collating Sequence=machine"; 
oconn.Open(); 
OleDbCommand ocmd = oconn.CreateCommand(); 
string na = TBNazwaKonta.Text.Replace("\n",""); 
na = na.Replace("\r","") ; 
string ks2 = ks.Replace("\n",""); 
ks2 = ks2.Replace("\r", ""); 
string zapytanie = @"insert into " + path + " (rk, Na,Ks,Ss,So,Wyr,Bw,Bm,Ow,Om,Wm,Mm,Pm,Pw,Ks1,Ks2,Ks3,Ks4,Llx,Wn01,Ma01,L01,Wn02,Ma02,L02,Wn03,Ma03,L03,Wn04,Ma04,L04,Wn05,Ma05,L05,Wn06,Ma06,L06,Wn07,Ma07,L07,Wn08,Ma08,L08,Wn09,Ma09,L09,Wn10,Ma10,L10,Wn11,Ma11,L11,Wn12,Ma12,L12) values (0,'Z-Dz PROD.OPAKOWAŃKIEWICZA 108 38-200 ', '200 02 000212',0,0,'',0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,'','','','',0,0.0,0.0,0,0.0,0.0,0,0.0,0.0,0,0.0,0.0,0,0.0,0.0,0,0.0,0.0,0,0.0,0.0,0,0.0,0.0,0,0.0,0.0,0,0.0,0.0,0,0.0,0.0,0,0.0,0.0,0)"; 
ocmd.CommandText = zapytanie; 
ocmd.ExecuteNonQuery(); 
oconn.Close();

連接是好的，插入查詢也沒關係，但我想知道爲什麼這個DBF不接受空值。

我在哪裏可以檢查dbf是否接受空值？當我使用程序讀取dbfs並執行查詢時，dbf接受空值。只有當我使用ado.net時才能接受。感謝任何幫助解決我的問題

來源

2012-06-28 BKl

某些列不接受NULL？如果沒有表格定義則不需要答覆。還要添加確切的錯誤消息+堆棧跟蹤。 –

您可以創建一個新的命令並在插入之前執行它。

OleDbCommand dbCmdNull = oconn.CreateCommand(); 
dbCmdNull.CommandText = "SET NULL OFF"; 
dbCmdNull.ExecuteNonQuery();

來源

2012-06-28 07:37:39 Habib

謝謝！這正是我想要的。它現在運作良好！謝謝你真的很快回答！ – BKl

您可以設置您的列不接受空值。

如果您使用的是visual foxpro，請打開您的dbf，轉到視圖>表設計器您將看到列的列表，最後一列指示它是否接受空值。

那裏有一個按鈕。取消選中，您的列將不會接受空值。

這將確保您不寫入空值。但是，如果存在空值，則將它們寫入某處。你將不得不修復那些代碼。

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2012-06-28 07:48:42 nunespascal

插入到dbf文件不接受空值

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