Question

我正在使用C＃创建一个Windows窗体应用程序，以便将扫描到文本框中的跟踪号码保存到数据库中。我有设计的表单和数据库设置，但我无法弄清楚如何将表单保存到数据库。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace PackageTracker
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {

    }

    private void confirmBtn_Click(object sender, EventArgs e)
    {
        try
        {
            //parses tracking number to determine the shipping method/carrier. Places result in shipType text box
            shipTypeTextBox.Text = determineShipType(trackingNumTextBox.Text);


            //save to DB
            this.Validate();
            this.packagesBindingSource.EndEdit();
            this.tableAdapterManager.UpdateAll(this.packagesDataSet);

            //display info sent to DB
            AutoClosingMessageBox.Show("Tracking Number: " + trackingNumTextBox.Text + "\n" +
                                    "Ship Type: " + shipTypeTextBox.Text + "\n" +
                                    "Ship Date: " + dateDateTimePicker.Value, "Test", 1000);

            //clear fields to ready form for next scan
            trackingNumTextBox.Text = "";
            shipTypeTextBox.Text = "";
        }

        catch(IndexOutOfRangeException err)
        {
            string errMess = string.Format("Error: {0}", err.Source);
            MessageBox.Show( errMess, "Error");
        }
    }

    public string determineShipType(string tNum)
    {
        if (tNum[0] == '1')
        {
            if (tNum.Substring(8, 2) == "YW")
                return "UPS Surepost";
            return "UPS";
        }
        if (tNum[0] == '4')
        {
            if(tNum.Substring(8, 4) == "9400")
                return "USPS FCM";
            if (tNum.Substring(8, 4) == "9405")
                return "USPS Priortiy Mail";
        }
        return "Unknown Ship Type";
    }
}

}

我做错了什么？

编辑：我没有编写Validate（）方法。我在另一个使用BindingNavigation控件的应用程序中复制了由VS自动生成的代码。以下是我右键单击它并使用Go To Definition：

时显示的代码

//
// Summary:
//     Verifies the value of the control losing focus by causing the System.Windows.Forms.Control.Validating
//     and System.Windows.Forms.Control.Validated events to occur, in that order.
//
// Returns:
//     true if validation is successful; otherwise, false. If called from the System.Windows.Forms.Control.Validating
//     or System.Windows.Forms.Control.Validated event handlers, this method will
//     always return false.
[TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]
public bool Validate();

当我将Packages表从我的DB拖到表单上时，这个代码全部由VS生成：

private PackagesDataSet packagesDataSet;
private System.Windows.Forms.BindingSource packagesBindingSource;
private PackagesDataSetTableAdapters.PackagesTableAdapter packagesTableAdapter;
private PackagesDataSetTableAdapters.TableAdapterManager tableAdapterManager;

使用Button将Windows窗体数据保存到数据库

0 个答案: