C# 插入 DBF table
C# insert into DBF table
我正在使用 VS2019,创建一个 Windows 表单应用程序。通常我只更新 DBF 文件,但这次,我需要插入一些数据。
我已经在 SO、MSDN 和其他网站上看过这里的示例。
DBF文件'transport'包含一些字段,包括transid,一个长度为10的char字段。
这是我的片段:
using System.Data.OleDb;
private static readonly string CONNECTION = @"Provider=VFPOLEDB;Data Source=C:\<path_to_existing_dbf-file>";
private void Test()
{
using (OleDbConnection conn = new OleDbConnection(CONNECTION))
{
conn.Open();
using (OleDbCommand cmd = new OleDbCommand("INSERT INTO transport (transid) VALUES (?)", conn))
{
cmd.Parameters.AddWithValue("@transid", "0123456789");
new OleDbCommand("set null off", conn).ExecuteNonQuery();
cmd.ExecuteNonQuery();
}
conn.Close();
}
}
有人知道我哪里出错了吗?
在 Visual FoxPro9.0 中,我可以毫无问题地执行命令:
SELECT * 来自运输
插入传输(transid)值('0123456789')。
我有一个 try-catch 围绕着它,别担心。
我的错误信息:
Der Befehl enthielt mindestens einen Fehler.
The command contained at least one error
异常堆栈跟踪:
at System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr)
at System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult)
at System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult)
at System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult)
at System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method)
at System.Data.OleDb.OleDbCommand.ExecuteNonQuery()
at ARKPromot.VFPInteraktion.ErstelleTransportauftrag() in C:<path>\VFPInteraktion.cs:line 252
string viewError = JsonConvert.SerializeObject(ex);
returns:
{"oledbErrors":[{"Message":"Der Befehl enthielt mindestens einen Fehler.","NativeError":0,"Source":"Microsoft OLE DB Provider for Visual FoxPro","SQLState":""}],"ClassName":"System.Data.OleDb.OleDbException","Message":"Der Befehl enthielt mindestens einen Fehler.","Data":null,"InnerException":null,"HelpURL":null,"StackTraceString":" bei System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr)\r\n bei System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult)\r\n bei System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult)\r\n bei System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult)\r\n bei System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method)\r\n bei System.Data.OleDb.OleDbCommand.ExecuteNonQuery()\r\n bei .ErstelleTransportauftrag(ARKPlatz quelle, String lkeyQuelle, ARKPlatz ziel, String lkeyZiel, String text, Meldung& meldung) in C:\VFPInteraktion.cs:Zeile 254.","RemoteStackTraceString":null,"RemoteStackIndex":0,"ExceptionMethod":"8\nExecuteCommandTextErrorHandling\nSystem.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\nSystem.Data.OleDb.OleDbCommand\nVoid ExecuteCommandTextErrorHandling(System.Data.OleDb.OleDbHResult)","HResult":-2147217900,"Source":"Microsoft OLE DB Provider for Visual FoxPro","WatsonBuckets":null}
好的,解决了
这是一个非常愚蠢的错误。
我的目录中有一个 .(dot).
这以某种方式破坏了 INSERT 和 UPDATE 查询。
但不是 SELECT 查询。
Link to tek-tips,他也帮助了我,还有一个来自 GriffMG 的最小工作示例:
(https://www.tek-tips.com/viewthread.cfm?qid=1808490)
低于最低工作示例。另外还有一个字段不可为空,这是在该过程中发现的。抱歉浪费大家的时间。
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
private static readonly string CONNECTION = @"Provider=VFPOLEDB;Data Source=d:$incoming\finedata\";
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
using (OleDbConnection conn = new OleDbConnection(CONNECTION))
{
conn.Open();
using (OleDbCommand cmd = new OleDbCommand("INSERT INTO transport1 (transid) VALUES (?)", conn))
{
cmd.Parameters.AddWithValue("@transid", "0123456789");
cmd.ExecuteNonQuery();
}
conn.Close();
}
}
}
}
我正在使用 VS2019,创建一个 Windows 表单应用程序。通常我只更新 DBF 文件,但这次,我需要插入一些数据。
我已经在 SO、MSDN 和其他网站上看过这里的示例。
DBF文件'transport'包含一些字段,包括transid,一个长度为10的char字段。
这是我的片段:
using System.Data.OleDb;
private static readonly string CONNECTION = @"Provider=VFPOLEDB;Data Source=C:\<path_to_existing_dbf-file>";
private void Test()
{
using (OleDbConnection conn = new OleDbConnection(CONNECTION))
{
conn.Open();
using (OleDbCommand cmd = new OleDbCommand("INSERT INTO transport (transid) VALUES (?)", conn))
{
cmd.Parameters.AddWithValue("@transid", "0123456789");
new OleDbCommand("set null off", conn).ExecuteNonQuery();
cmd.ExecuteNonQuery();
}
conn.Close();
}
}
有人知道我哪里出错了吗? 在 Visual FoxPro9.0 中,我可以毫无问题地执行命令: SELECT * 来自运输 插入传输(transid)值('0123456789')。
我有一个 try-catch 围绕着它,别担心。
我的错误信息:
Der Befehl enthielt mindestens einen Fehler.
The command contained at least one error
异常堆栈跟踪:
at System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr)
at System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult) at System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult) at System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult) at System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method) at System.Data.OleDb.OleDbCommand.ExecuteNonQuery() at ARKPromot.VFPInteraktion.ErstelleTransportauftrag() in C:<path>\VFPInteraktion.cs:line 252
string viewError = JsonConvert.SerializeObject(ex);
returns:
{"oledbErrors":[{"Message":"Der Befehl enthielt mindestens einen Fehler.","NativeError":0,"Source":"Microsoft OLE DB Provider for Visual FoxPro","SQLState":""}],"ClassName":"System.Data.OleDb.OleDbException","Message":"Der Befehl enthielt mindestens einen Fehler.","Data":null,"InnerException":null,"HelpURL":null,"StackTraceString":" bei System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr)\r\n bei System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult)\r\n bei System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult)\r\n bei System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult)\r\n bei System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method)\r\n bei System.Data.OleDb.OleDbCommand.ExecuteNonQuery()\r\n bei .ErstelleTransportauftrag(ARKPlatz quelle, String lkeyQuelle, ARKPlatz ziel, String lkeyZiel, String text, Meldung& meldung) in C:\VFPInteraktion.cs:Zeile 254.","RemoteStackTraceString":null,"RemoteStackIndex":0,"ExceptionMethod":"8\nExecuteCommandTextErrorHandling\nSystem.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\nSystem.Data.OleDb.OleDbCommand\nVoid ExecuteCommandTextErrorHandling(System.Data.OleDb.OleDbHResult)","HResult":-2147217900,"Source":"Microsoft OLE DB Provider for Visual FoxPro","WatsonBuckets":null}
好的,解决了
这是一个非常愚蠢的错误。 我的目录中有一个 .(dot).
这以某种方式破坏了 INSERT 和 UPDATE 查询。 但不是 SELECT 查询。 Link to tek-tips,他也帮助了我,还有一个来自 GriffMG 的最小工作示例: (https://www.tek-tips.com/viewthread.cfm?qid=1808490)
低于最低工作示例。另外还有一个字段不可为空,这是在该过程中发现的。抱歉浪费大家的时间。
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
private static readonly string CONNECTION = @"Provider=VFPOLEDB;Data Source=d:$incoming\finedata\";
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
using (OleDbConnection conn = new OleDbConnection(CONNECTION))
{
conn.Open();
using (OleDbCommand cmd = new OleDbCommand("INSERT INTO transport1 (transid) VALUES (?)", conn))
{
cmd.Parameters.AddWithValue("@transid", "0123456789");
cmd.ExecuteNonQuery();
}
conn.Close();
}
}
}
}