DataBinding到WinForm

Question

我有一个带有10个TextBox的表单(CustomerInfoForm).Text每个默认属性TextBoxes都是在设计时定义的.子类CustomerInfoForm.CustomerInfo 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将数据源绑定到文本框

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

每个文本框由C#ide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Text在IDE生成的代码中,直到DataBinding之后才设置该属性).

当我运行项目时,表单将显示为默认值TextBoxes.但是,当SaveButton按下序列MyForm.CustomerInfo化子类中的属性时,它们都为null.由于这些值只会从我希望我不必实现接口的表单中更改INotifyPropertyChanged.

我错过了一些基本或简单的东西吗？

包含数据序列化的表单代码如下

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 - 对于可能在这个问题上发生的其他人

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", FileMode.Create);
            serializer.WriteObject(writer,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; }
        }
    }
}

Answer 1

首先，您需要决定是使用数据绑定还是Text直接操作属性。这两种方法不应混合在一起。

如果您想使用数据绑定，则代码中缺少一行：

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

您需要让您customerInfoBindingSource了解数据源。

如果添加此行，则Text在设计时分配的 将会被绑定数据源中的文本覆盖。如果您想使用绑定，您应该使用数据源进行操作，而不是Text直接设置字段。像这样：

public Form1()
{
    InitializeComponent();

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