数据绑定到WinForm

问题描述

| 我有一个带有10个文本框的表单（CustomerInfoForm）。每个

TextBoxes

的默认

Text

属性在设计时定义。子类“ 2”包含用于保存在表单中输入的数据的属性。包含数据的子类将被序列化为XML。 在自动生成的表单代码中，每个文本框都有一行代码，用于将数据源绑定到文本框

this.customerInfoBindingSource = new System.Windows.Forms.BindingSource(this.components);

C＃ide为每个文本框自动生成的代码：

this.txtCustomer.DataBindings.Add(new System.Windows.Forms.Binding(\"Text\",this.customerInfoForm_CustomerInfoBindingSource,\"CustomerName\",true));
this.txtCustomer.Location = new System.Drawing.Point(60,23);
this.txtCustomer.Name = \"txtCustomer\";
this.txtCustomer.Size = new System.Drawing.Size(257,20);
this.txtCustomer.TabIndex = 0;
this.txtCustomer.Text = \"CustomerName\";

（我注意到在数据绑定之后才设置

Text

属性）在IDE生成的代码中。 当我运行项目时，窗体将以默认值显示在ѭ1中。但是，当按ѭ7序列化

MyForm.CustomerInfo

子类中的属性时，它们全为空。由于这些值仅会从表单中更改，因此我希望不必实现接口

INotifyPropertyChanged

。 我缺少基本的还是简单的东西？ 包含数据序列化的表格代码如下

using System;
using System.Windows.Forms;
using System.Xml.Serialization;
using System.IO;
using System.Runtime.Serialization;

namespace SimpleCustomerInfo
{
    // You must apply a DataContractAttribute or SerializableAttribute
    // to a class to have it serialized by the DataContractSerializer.

    public partial class CustomerInfoForm : Form
    {
        CustomerInfo ci = new CustomerInfo();

        public CustomerInfoForm()
        {
            InitializeComponent();
        }

        private void btnSave_Click(object sender,EventArgs e)
        {
            DataContractSerializer serializer = new DataContractSerializer(typeof(CustomerInfo));
            FileStream writer = new FileStream(@\"C:\\Users\\Me\\temp\\testme.xml\",FileMode.Create);
            serializer.WriteObject(writer,ci);
            writer.Close();
        }

        [DataContract(Name = \"Customer\",Namespace = \"net.ElectronicCanvas\")]
        public class CustomerInfo
        {
            [DataMember]
            public string CustomerName { get; set; }
            [DataMember]
            public PhoneInfo PhonePrimary { get; set; }
            [DataMember]
            public PhoneInfo PhoneDays { get; set; }
            [DataMember]
            public PhoneInfo PhoneEvening { get; set; }
        }

        public class PhoneInfo
        {
            public string number { get; set; }
            public string type { get; set; }
            public bool textOk { get; set; }
        }
    }
}

编辑-对于可能在此问题上发生的其他问题

using System;
using System.Windows.Forms;
using System.Xml.Serialization;
using System.IO;
using System.Runtime.Serialization;

namespace SimpleCustomerInfo
{


    public partial class CustomerInfoForm : Form
    {
        CustomerInfo ci;

        public CustomerInfoForm()
        {
            InitializeComponent();
            ci = new CustomerInfo();
            ci.CustomerName = \"My Customer Name\";
            ci.PhoneDays.number = \"888-888-8888\";
            customerInfoForm_CustomerInfoBindingSource.DataSource = ci;

        }

        private void btnSave_Click(object sender,EventArgs e)
        {

            DataContractSerializer serializer = new DataContractSerializer(typeof(CustomerInfo));
            FileStream writer = new FileStream(@\"C:\\Users\\me\\temp\\testme.xml\",ci);
            writer.Close();
        }
        // You must apply a DataContractAttribute or SerializableAttribute
        // to a class to have it serialized by the DataContractSerializer.
        [DataContract(Name = \"Customer\",Namespace = \"net.ElectronicCanvas\")]
        public class CustomerInfo
        {
            [DataMember]
            public string CustomerName { get; set; }
            [DataMember]
            public PhoneInfo PhonePrimary { get; set; }
            [DataMember]
            public PhoneInfo PhoneDays { get; set; }
            [DataMember]
            public PhoneInfo PhoneEvening { get; set; }

            // Constructor is needed to instantiate the PhoneInfo classes
            // within the CustomerInfo class
            public CustomerInfo()
            {
                PhonePrimary = new PhoneInfo();
                PhoneDays = new PhoneInfo();
                PhoneEvening = new PhoneInfo();
            }
        }

        public class PhoneInfo
        {
            public string number { get; set; }
            public string type { get; set; }
            public bool textOk { get; set; }
        }
    }
}

    

解决方法

        首先，您需要决定是使用数据绑定还是直接操作“ 0”属性。这两种方法不应混在一起。 如果要使用数据绑定，则代码中缺少一行：

public Form1()
{
    InitializeComponent();
    customerInfoBindingSource.DataSource = ci;  // This is the missing line
}

您需要让您的

customerInfoBindingSource

了解数据源。 如果添加此行，则在设计时分配的“ 0”将被绑定数据源中的文本覆盖。如果要使用绑定，则应使用数据源进行操作，而不要直接设置“ 0”字段。像这样：

public Form1()
{
    InitializeComponent();

    ci.CustomerName = \"TestCustomerName\";
    customerInfoBindingSource.DataSource = ci;
}