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c#-将数据发送到Access数据库时出错

(c# - Error sending data to the Access Database)

发布于 2020-11-30 03:26:48

当我尝试将代码发送到Access数据库时出现此异常:

System.Data.OleDb.OleDbException(0x80040E07):选择条件表达式中的数据类型不匹配

在System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS
dbParams,Object&executeResult)
在System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(System.Data.OleDb.OleDbCommand.ExecuteCommandText(Data&Execute
。) OleDb.OleDbCommand.ExecuteCommand(的CommandBehavior行为,对象&的ExecuteReuslt)
在System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(的CommandBehavior行为,字符串方法)
在System.Data.OleDb.OleDbCommand.ExecuteNonQuery()
在KPIZ.Form2.btn_save_Click(对象发件人,EventArgs e),位于C:\ Users \ booku \ source \ repos \ KPIZ \ KPIZ \ Form2.cs:第110行

我的代码:

private void btn_save_Click(object sender, EventArgs e)
{
        try
        {
            byte[] imageBt = null;
            FileStream fstream = new FileStream(this.textBox2.Text, FileMode.Open, FileAccess.Read);
            BinaryReader br = new BinaryReader(fstream);
            imageBt = br.ReadBytes((int)fstream.Length);

            connection.Open();

            OleDbCommand command = new OleDbCommand();
            command.Connection = connection;
            command.CommandText = @"INSERT INTO [SportInfo]([ID],[FirstName],[LastName],[DOB],[Sport],[DIW],[Image])" + "VALUES(@id, @Fn, @Ln, @Date, @Sports, @days ,@IMG)";
            
            command.Parameters.Add(new OleDbParameter("@Fn", Convert.ToString(txt_fname.Text)));
            command.Parameters.Add(new OleDbParameter("@Ln", Convert.ToString(txt_lname.Text)));
            command.Parameters.Add(new OleDbParameter("@Date", Convert.ToString(mtxt_dob.Text)));
            command.Parameters.Add(new OleDbParameter("@Sports", Convert.ToString(txt_sport.Text)));
            command.Parameters.Add(new OleDbParameter("@days", Convert.ToInt32(nmc_diw.Text)));
            command.Parameters.Add(new OleDbParameter("@id", Convert.ToInt32(txt_id.Text)));
            command.Parameters.Add(new OleDbParameter("@IMG", imageBt));

            command.ExecuteNonQuery();

            MessageBox.Show("Data Saved");
            connection.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show("Unlucky  " + ex);
            connection.Close();
        }

        try
        {
            connection.Open();
            OleDbCommand command = new OleDbCommand();
            command.Connection = connection;
            string query = "select ID,LastName,FirstName,DOB,Sport,DIW, from SportInfo ";
            command.CommandText = query;

            OleDbDataAdapter da = new OleDbDataAdapter(command);
            dt = new DataTable();
            da.Fill(dt);
            dataGridView1.DataSource = dt;

            connection.Close();
        }
}
Questioner
booker
Viewed
11
Erik A 2020-11-30 14:41:22

OLEDB参数始终处于位置。这意味着查询中参数的顺序需要与添加到代码中的参数顺序相匹配。

另外,你需要将date参数添加为日期,而不是字符串。

调整参数顺序以匹配:

        command.Parameters.Add(new OleDbParameter("@id", Convert.ToInt32(txt_id.Text)));
        command.Parameters.Add(new OleDbParameter("@Fn", Convert.ToString(txt_fname.Text)));
        command.Parameters.Add(new OleDbParameter("@Ln", Convert.ToString(txt_lname.Text)));
        command.Parameters.Add(new OleDbParameter("@Date", DateTime.Parse(mtxt_dob.Text)));
        command.Parameters.Add(new OleDbParameter("@Sports", Convert.ToString(txt_sport.Text)));
        command.Parameters.Add(new OleDbParameter("@days", Convert.ToInt32(nmc_diw.Text)));
        command.Parameters.Add(new OleDbParameter("@IMG", imageBt));

如果顺序不匹配,则会出现很多错误,因为现在你正尝试在日期列或整数列中插入文本字段。