在DBF文件中插入日期时间

本文关键字：日期 时间 插入 DBF 文件 | 更新日期: 2023-09-27 18:14:38

我得到一个语法错误在下面的代码。从我的测试来看，它来自场"tax_month"，它是一个DateTime。我不知道如何在日期时间格式中插入值。

该字段的模式:

ColumnName:       tax_month,
ColumnOrdinal:    0,
ColumnSize:       6,
NumericPrecision: 10,
NumericScale:     0,
DataType:         System.DateTime,
ProviderType:     23
这是我的c#代码: 
string path = @"C:'Purchases'DATA'";
string fileName = "purchase.dbf";
DateTime tax_month = DateTime.FromOADate(41305);
private void button1_Click(object sender, EventArgs e)
{
    OdbcConnection dbfConn = new OdbcConnection();
    dbfConn.ConnectionString = @"Driver={Microsoft Visual FoxPro Driver};SourceType=DBF;Exclusive=No;Collate=Machine;NULL=NO;DELETED=YES;BACKGROUNDFETCH=NO;SourceDB=" + path;
    dbfConn.Open();
    OdbcCommand oCmd = dbfConn.CreateCommand(); // needed to query data
    oCmd.CommandText = "INSERT INTO " + fileName + " ('tax_month') VALUES ("+tax_month+")";
    int inserted = oCmd.ExecuteNonQuery();
    dbfConn.Close();
    MessageBox.Show("Number of Rows inserted:"+inserted);
}

在DBF文件中插入日期时间

尝试使用参数化查询，并让工作将您的数据时间解析到。NET Framework代码

using(OdbcConnection dbfConn = new OdbcConnection())
{
    dbfConn.ConnectionString = @"Driver={Microsoft Visual FoxPro Driver};SourceType=DBF;Exclusive=No;Collate=Machine;NULL=NO;DELETED=YES;BACKGROUNDFETCH=NO;SourceDB=" + path;
    dbfConn.Open();
    OdbcCommand oCmd = dbfConn.CreateCommand(); // needed to query data
    oCmd.CommandText = "INSERT INTO " + fileName + " +
        "(tax_month,seq_no,tin,registered_name,last_name,first_name,middle_name,address1," + 
        "address2,gpurchase,gtpurchase,gepurchase,gzpurchase,gtservpurchase,gtcappurchase," + 
        "gtothpurchase,tinputtax,tax_rate) VALUES (" + 
        "?, 3, '222333445','TEST COMPANY','','','','DI MAKITA STREET','MANDALUYONG 1602', " + 
        "52107.14, 49107.14, 1000, 2000, 3000, 4000, 42107.14, 5892.86, 12)"
    oCmd.Parameters.Add("@p1", OdbcType.DateTime).Value = tax_month;
    int inserted = oCmd.ExecuteNonQuery();
}

另外，列名应该不带单引号。使用参数查询还有一个额外的好处，可以避免Sql注入，尽管您的代码不是完全安全的，因为表名附加了字符串连接

在insert查询中使用'"+tax_month+"'而不是"+tax_month+"。尝试更改插入查询，如

oCmd.CommandText = "INSERT INTO " + fileName + " ('tax_month','seq_no','tin','registered_name','last_name','first_name','middle_name','address1','address2','gpurchase','gtpurchase','gepurchase','gzpurchase','gtservpurchase','gtcappurchase','gtothpurchase','tinputtax','tax_rate') VALUES ('"+tax_month.ToString("yyyy-MM-dd")+"',3,'222333445','TEST COMPANY','','','','DI MAKITA STREET','MANDALUYONG 1602', 52107.14, 49107.14, 1000, 2000, 3000, 4000, 42107.14, 5892.86, 12)";

或者也可以使用parameterized query，比如

oCmd.CommandText = "INSERT INTO " + fileName + " +
        "(tax_month,seq_no,tin,registered_name,last_name,first_name,middle_name,address1," + 
        "address2,gpurchase,gtpurchase,gepurchase,gzpurchase,gtservpurchase,gtcappurchase," + 
        "gtothpurchase,tinputtax,tax_rate) VALUES (" + 
        "?, 3, '222333445','TEST COMPANY','','','','DI MAKITA STREET','MANDALUYONG 1602', " + 
        "52107.14, 49107.14, 1000, 2000, 3000, 4000, 42107.14, 5892.86, 12)"
    oCmd.Parameters.Add("@p1", OdbcType.DateTime).Value = tax_month;


 sql = "insert into ts8heat (HDATE,HEAT_NO[,STGR,WIDTH,C,SI,MN,P,S,AL); values (@HDATE[,@HEAT_NO,@STGR,@WIDTH,@C,@SI,@MN,@P,@S,@AL])";//select scope_identity()";
            OleDbCommand cmd = new OleDbCommand(sql, conn);
            cmd.Parameters.AddWithValue("@HDATE", D_PICER1.Text.ToString());
            cmd.Parameters.AddWithValue("@HEAT_NO", txt_heats.Text);
            cmd.Parameters.AddWithValue("@STGR", txt_stgr.Text);
            cmd.Parameters.AddWithValue("@WIDTH", txt_width.Text);
            cmd.Parameters.AddWithValue("@c", txt_C.Text);
            cmd.Parameters.AddWithValue("@si", txt_Si.Text);
            cmd.Parameters.AddWithValue("@MN", txt_Mn.Text);
            cmd.Parameters.AddWithValue("@P", txt_P.Text);
            cmd.Parameters.AddWithValue("@s", txt_S.Text);
            cmd.Parameters.AddWithValue("@AL", txt_al.Text);
            DataTable dt = new DataTable();
             da = new OleDbDataAdapter(cmd);
            da.Fill(dt);
            dataGridView1.DataSource = dt;
            dataGridView1.Refresh();
            MessageBox.Show(" Add SaccessFuly !: ");
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