如何插入DBF文件(foxpro)

Question

我在asp.net中有以下代码:

using (OleDbCommand command = dbConnW.CreateCommand())
{
    string CreateTableK = null;
    CreateTableK += "Create Table DSKKAR00 (DSK_ID c(10),DSK_KIND N(1),MON_PYM C(3))";
    OleDbCommand cmdCreateTable = new OleDbCommand(CreateTableK, dbConnW);
    cmdCreateTable.ExecuteNonQuery();
    System.Text.StringBuilder sb = new  System.Text.StringBuilder();
    sb.Append(WorkRoomNo + ","); 
    sb.Append("1,");
    sb.Append(",");
    OleDbCommand cmd3 = new OleDbCommand("Insert into DSKKAR00 (DSK_ID,DSK_KIND,MON_PYM) Values (" + sb.ToString() + ")", dbConnW);
    cmd3.ExecuteNonQuery();

但是我有以下错误:

语法错误

Answer 1

除了Chris提供的内容之外,您还将使用NULL字符串变量启动CREATE TABLE,然后对其执行+ =.根据我的记忆,NULL + ="anystring"将保持空值...你也可能在那里崩溃.

尽管VFP并不像其他SQL引擎那样容易被SQL注入,但它的参数化习惯却很好.当你这样做时,使用"？" 作为要插入的值的占位符,并以与"？"相同的顺序添加参数 代表.

string CreateTableK = 
   "Create Table DSKKAR00 (DSK_ID c(10),DSK_KIND N(1),MON_PYM C(3))";     

OleDbCommand cmdCreateTable = new OleDbCommand(CreateTableK, dbConnW);
cmdCreateTable.ExecuteNonQuery();     

string MyInsert = 
   "insert into DSKKAR00 ( dsk_id, dsk_kind, mon_pym ) values ( ?, ?, ? )";
OleDbCommand cmd3 = new OleDbCommand( MyInsert, dbConnW);
cmd3.Parameters.AddWithValue( "parmSlot1", WorkRoomNo );
cmd3.Parameters.AddWithValue( "parmSlot2", 1);
cmd3.Parameters.AddWithValue( "parmSlot3", 'tst' ); // or whatever variable to put
cmd3.ExecuteNonQuery();