高手能不能详细的说一下C#里面数据绑定的东东，我看了半天，还是糊里糊涂的，谢谢！

[sxh401]

如题，谢谢！
最好能配合例子，详细的讲解一番，不好意思，我是菜鸟 ^_^

[维她奶]

UP!!!

[Coder李海波]

不要急，慢慢来

[ETstudio]

举个例子简单的说:
有一个xml文件,绑定在一个datagrid上
当datagrid上的数据改变的时候,xml也会相应的改变,不用你去写输入的格式等东西

[administr]

光看书不行，照着书上例子去做一遍

[甴曱]

你看一下这一篇：
ms-help://MS.NETFrameworkSDK.CHS/cpref/html/frlrfSystemWindowsFormsBindingClassTopic.htm
这是它里面自带的例子：
using System;
using System.Data;
using System.Drawing;
using System.Globalization;
using System.Windows.Forms;

public class Form1 : System.Windows.Forms.Form
{
private System.ComponentModel.Container components;
private Button button1;
private Button button2;
private Button button3;
private Button button4;
private TextBox text1;
private TextBox text2;
private TextBox text3;

private BindingManagerBase bmCustomers;
private BindingManagerBase bmOrders;
private DataSet ds;
private DateTimePicker DateTimePicker1;

public Form1()
{
// Required for Windows Form Designer support.
InitializeComponent();
// Call SetUp to bind the controls.
SetUp();
}

private void InitializeComponent()
{
// Create the form and its controls.
this.components = new System.ComponentModel.Container();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.button4 = new System.Windows.Forms.Button();

this.text1= new System.Windows.Forms.TextBox();
this.text2= new System.Windows.Forms.TextBox();
this.text3= new System.Windows.Forms.TextBox();

this.DateTimePicker1 = new DateTimePicker();

this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.Text = "Binding Sample";
this.ClientSize = new System.Drawing.Size(450, 200);

button1.Location = new System.Drawing.Point(24, 16);
button1.Size = new System.Drawing.Size(64, 24);
button1.Text = "<";
button1.Click+=new System.EventHandler(button1_Click);

button2.Location = new System.Drawing.Point(90, 16);
button2.Size = new System.Drawing.Size(64, 24);
button2.Text = ">";
button2.Click+=new System.EventHandler(button2_Click);

button3.Location = new System.Drawing.Point(90, 100);
button3.Size = new System.Drawing.Size(64, 24);
button3.Text = "<";
button3.Click+=new System.EventHandler(button3_Click);

button4.Location = new System.Drawing.Point(150, 100);
button4.Size = new System.Drawing.Size(64, 24);
button4.Text = ">";
button4.Click+=new System.EventHandler(button4_Click);

text1.Location = new System.Drawing.Point(24, 50);
text1.Size = new System.Drawing.Size(150, 24);

text2.Location = new System.Drawing.Point(190, 50);
text2.Size = new System.Drawing.Size(150, 24);

text3.Location = new System.Drawing.Point(290, 150);
text3.Size = new System.Drawing.Size(150, 24);

DateTimePicker1.Location = new System.Drawing.Point(90, 150);
DateTimePicker1.Size = new System.Drawing.Size(200, 800);

this.Controls.Add(button1);
this.Controls.Add(button2);
this.Controls.Add(button3);
this.Controls.Add(button4);
this.Controls.Add(text1);
this.Controls.Add(text2);
this.Controls.Add(text3);
this.Controls.Add(DateTimePicker1);
}

[甴曱]

protected override void Dispose( bool disposing ){
if( disposing ){
if (components != null){
components.Dispose();}
}
base.Dispose( disposing );
}
public static void Main()
{
Application.Run(new Form1());
}

private void SetUp()
{
// Create a DataSet with two tables and one relation.
MakeDataSet();
BindControls();
}

protected void BindControls()
{
/* Create two Binding objects for the first two TextBox
controls. The data-bound property for both controls
is the Text property. The data source is a DataSet
(ds). The data member is the
"TableName.ColumnName" string. */
text1.DataBindings.Add(new Binding
("Text", ds, "customers.custName"));
text2.DataBindings.Add(new Binding
("Text", ds, "customers.custID"));

/* Bind the DateTimePicker control by adding a new Binding.
The data member of the DateTimePicker is a
TableName.RelationName.ColumnName string. */
DateTimePicker1.DataBindings.Add(new
Binding("Value", ds, "customers.CustToOrders.OrderDate"));

/* Add event delegates for the Parse and Format events to a
new Binding object, and add the object to the third
TextBox control's BindingsCollection. The delegates
must be added before adding the Binding to the
collection; otherwise, no formatting occurs until
the Current object of the BindingManagerBase for
the data source changes. */
Binding b = new Binding
("Text", ds, "customers.custToOrders.OrderAmount");
b.Parse+=new ConvertEventHandler(CurrencyStringToDecimal);
b.Format+=new ConvertEventHandler(DecimalToCurrencyString);
text3.DataBindings.Add(b);

// Get the BindingManagerBase for the Customers table.
bmCustomers = this.BindingContext [ds, "Customers"];

/* Get the BindingManagerBase for the Orders table using the
RelationName. */
bmOrders = this.BindingContext[ds, "customers.CustToOrders"];
}

private void DecimalToCurrencyString(object sender, ConvertEventArgs cevent)
{
/* This method is the Format event handler. Whenever the
control displays a new value, the value is converted from
its native Decimal type to a string. The ToString method
then formats the value as a Currency, by using the
formatting character "c". */

// The application can only convert to string type.
if(cevent.DesiredType != typeof(string)) return;

cevent.Value = ((decimal) cevent.Value).ToString("c");
}

private void CurrencyStringToDecimal(object sender, ConvertEventArgs cevent)
{
/* This method is the Parse event handler. The Parse event
occurs whenever the displayed value changes. The static
ToDecimal method of the Convert class converts the
value back to its native Decimal type. */

// Can only convert to decimal type.
if(cevent.DesiredType != typeof(decimal)) return;

cevent.Value = Decimal.Parse(cevent.Value.ToString(),
NumberStyles.Currency, null);

/* To see that no precision is lost, print the unformatted
value. For example, changing a value to "10.0001"
causes the control to display "10.00", but the
unformatted value remains "10.0001". */
Console.WriteLine(cevent.Value);
}

protected void button1_Click(object sender, System.EventArgs e)
{
// Go to the previous item in the Customer list.
bmCustomers.Position -= 1;
}

protected void button2_Click(object sender, System.EventArgs e)
{
// Go to the next item in the Customer list.
bmCustomers.Position += 1;
}

protected void button3_Click(object sender, System.EventArgs e)
{
// Go to the previous item in the Orders list.
bmOrders.Position-=1;
}

protected void button4_Click(object sender, System.EventArgs e)
{
// Go to the next item in the Orders list.
bmOrders.Position+=1;
}

// Create a DataSet with two tables and populate it.
private void MakeDataSet()
{
// Create a DataSet.
ds = new DataSet("myDataSet");

// Create two DataTables.
DataTable tCust = new DataTable("Customers");
DataTable tOrders = new DataTable("Orders");

// Create two columns, and add them to the first table.
DataColumn cCustID = new DataColumn("CustID", typeof(int));
DataColumn cCustName = new DataColumn("CustName");
tCust.Columns.Add(cCustID);
tCust.Columns.Add(cCustName);

// Create three columns, and add them to the second table.
DataColumn cID =
new DataColumn("CustID", typeof(int));
DataColumn cOrderDate =
new DataColumn("orderDate",typeof(DateTime));
DataColumn cOrderAmount =
new DataColumn("OrderAmount", typeof(decimal));
tOrders.Columns.Add(cOrderAmount);
tOrders.Columns.Add(cID);
tOrders.Columns.Add(cOrderDate);

// Add the tables to the DataSet.
ds.Tables.Add(tCust);
ds.Tables.Add(tOrders);

// Create a DataRelation, and add it to the DataSet.
DataRelation dr = new DataRelation
("custToOrders", cCustID , cID);
ds.Relations.Add(dr);

/* Populate the tables. For each customer and order,
create two DataRow variables. */
DataRow newRow1;
DataRow newRow2;

// Create three customers in the Customers Table.
for(int i = 1; i < 4; i++)
{
newRow1 = tCust.NewRow();
newRow1["custID"] = i;
// Add the row to the Customers table.
tCust.Rows.Add(newRow1);
}
// Give each customer a distinct name.
tCust.Rows[0]["custName"] = "Alpha";
tCust.Rows[1]["custName"] = "Beta";
tCust.Rows[2]["custName"] = "Omega";

// For each customer, create five rows in the Orders table.
for(int i = 1; i < 4; i++)
{
for(int j = 1; j < 6; j++)
{
newRow2 = tOrders.NewRow();
newRow2["CustID"]= i;
newRow2["orderDate"]= new DateTime(2001, i, j * 2);
newRow2["OrderAmount"] = i * 10 + j * .1;
// Add the row to the Orders table.
tOrders.Rows.Add(newRow2);
}
}
}
}
[JScript]
import System;
import System.Data;
import System.Drawing;
import System.Globalization;
import System.Windows.Forms;

[GreenSpring]

绑定带分页

<%@ Import Namespace="System.Data" %>

<html>

<script language="C#" runat="server">

ICollection CreateDataSource() {
DataTable dt = new DataTable();
DataRow dr;

dt.Columns.Add(new DataColumn("整数值", typeof(Int32)));
dt.Columns.Add(new DataColumn("字符串值", typeof(string)));
dt.Columns.Add(new DataColumn("日期时间值", typeof(string)));
dt.Columns.Add(new DataColumn("布尔值", typeof(bool)));

for (int i = 0; i < 200; i++) {
dr = dt.NewRow();

dr[0] = i;
dr[1] = "项 " + i.ToString();
dr[2] = DateTime.Now.ToShortDateString();
dr[3] = (i % 2 != 0) ? true : false;

dt.Rows.Add(dr);
}

DataView dv = new DataView(dt);
return dv;
}

void Page_Load(Object sender, EventArgs e) {
if (chk1.Checked) {
MyDataGrid.PagerStyle.Mode=PagerMode.NumericPages;
}
else {
MyDataGrid.PagerStyle.Mode=PagerMode.NextPrev;
}

BindGrid();
}

void MyDataGrid_Page(Object sender, DataGridPageChangedEventArgs e) {
MyDataGrid.CurrentPageIndex = e.NewPageIndex;

BindGrid();
}

void BindGrid() {
MyDataGrid.DataSource = CreateDataSource();
MyDataGrid.DataBind();
ShowStats();
}

void ShowStats() {
lblCurrentIndex.Text = "CurrentPageIndex 为 " + MyDataGrid.CurrentPageIndex;
lblPageCount.Text = "PageCount 为 " + MyDataGrid.PageCount;
}


</script>

<body>

<h3><font face="宋体">DataGrid 的基本分页</font></h3>

<form runat=server>

<ASP:DataGrid id="MyDataGrid" runat="server"
AllowPaging="True"
PageSize="10"
PagerStyle-Mode="NumericPages"
PagerStyle-HorizontalAlign="Right"
PagerStyle-NextPageText="下一页"
PagerStyle-PrevPageText="上一页"
OnPageIndexChanged="MyDataGrid_Page"
BorderColor="black"
BorderWidth="1"
GridLines="Both"
CellPadding="3"
CellSpacing="0"
Font-Name="宋体"
Font-Size="8pt"
HeaderStyle-BackColor="#aaaadd"
AlternatingItemStyle-BackColor="#eeeeee"
/>

<p>
<asp:Checkbox id="chk1" runat="server"
Text="显示数值页导航按钮"
Font-Name="Verdana"
Font-Size="8pt"
AutoPostBack="true"
/>

<p>
<table bgcolor="#eeeeee" cellpadding="6"><tr><td nowrap><font face="宋体" size="-2">

<asp:Label id="lblCurrentIndex" runat="server" /><br>
<asp:Label id="lblPageCount" runat="server" /><br>

</font></td></tr></table>
</form>

</body>
</html>

[dahuzizyd]

最好的在帮助里：
.NET框架/使用.NET框架编程/通过ADO.NET访问数据，什么连接池的控制，数据连接的方案分析，都很全面，

[Jacode]

如何才能让我用C#做的控件支持数据绑定啊

[fourfire29]

绑定就是把数据与控件的属性联系起来，数据改变影响控件属性值，属性值改变影响数据，其中的关系由数据绑定控制器完成，你不用管，但出现问题可能比较难找。
即使不用绑定，你仍然能够通过自己的代码完成绑定功能，你能够控制所有的操作和逻辑。
一点认识，浅薄的很

[xuziling32]

up

[pingo888]

up
这要怎么说才详细呢？
自己多调试一下吧，其实很简单的。

[siao]

在两边set的时候作事件触发，改变另一个量

[gaolang1]

protected void BindControls()
{
/* Create two Binding objects for the first two TextBox
controls. The data-bound property for both controls
is the Text property. The data source is a DataSet
(ds). The data member is specified by a navigation
path in the form : TableName.ColumnName. */
textBox1.DataBindings.Add(new Binding
("Text", ds, "customers.custName"));
textBox2.DataBindings.Add(new Binding
("Text", ds, "customers.custID"));

/* Bind the DateTimePicker control by adding a new Binding.
The data member of the DateTimePicker is specified by a
navigation path in the form: TableName.RelationName.ColumnName. */
DateTimePicker1.DataBindings.Add(new
Binding("Value", ds, "customers.CustToOrders.OrderDate"));

/* Create a new Binding using the DataSet and a
navigation path(TableName.RelationName.ColumnName).
Add event delegates for the Parse and Format events to
the Binding object, and add the object to the third
TextBox control's BindingsCollection. The delegates
must be added before adding the Binding to the
collection; otherwise, no formatting occurs until
the Current object of the BindingManagerBase for
the data source changes. */
Binding b = new Binding
("Text", ds, "customers.custToOrders.OrderAmount");
b.Parse += new ConvertEventHandler(CurrencyStringToDecimal);
b.Format += new ConvertEventHandler(DecimalToCurrencyString);
textBox3.DataBindings.Add(b);

/*Bind the fourth TextBox to the Value of the
DateTimePicker control. This demonstrates how one control
can be bound to another.*/
textBox4.DataBindings.Add("Text", DateTimePicker1,"Value");
BindingManagerBase bmText = this.BindingContext[
DateTimePicker1];

/* Print the Type of the BindingManagerBase, which is
a PropertyManager because the data source
returns only a single property value. */
Console.WriteLine(bmText.GetType().ToString());
// Print the count of managed objects, which is 1.
Console.WriteLine(bmText.Count);

// Get the BindingManagerBase for the Customers table.
bmCustomers = this.BindingContext [ds, "Customers"];
/* Print the Type and count of the BindingManagerBase.
Because the data source inherits from IBindingList,
it is a RelatedCurrencyManager (derived from CurrencyManager). */
Console.WriteLine(bmCustomers.GetType().ToString());
Console.WriteLine(bmCustomers.Count);

/* Get the BindingManagerBase for the Orders of the current
customer using a navigation path: TableName.RelationName. */
bmOrders = this.BindingContext[ds, "customers.CustToOrders"];
}

[甴曱]

you look:
http://www.microsoft.com/china/msdn/adonet.asp

[甴曱]

And look:
http://support.microsoft.com/default.aspx?scid=kb;zh-cn;313482

[donnatian]

up

[kuangren]

多做就行～