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silverlight 数据绑定数据源改变时自动传播到目标

2010-08-10 20:04 393 查看

在datagrid中使用 Mode=TwoWay 方式绑定数据源, 数据源改变时,界面中的值没有自动改变

msdn解释：

对于 OneWay 或 TwoWay 绑定，对源的动态更改不会自动传播到目标。必须在源对象上实现 INotifyPropertyChanged 接口。创建实现INotifyPropertyChanged 接口的对象

显示行号复制代码？这是一段程序代码。

public class Person : INotifyPropertyChanged

private string firstNameValue;

public string FirstName

get { return firstNameValue; }

set

firstNameValue = value;

// Call NotifyPropertyChanged when the property is updated

NotifyPropertyChanged("FirstName");
}
}
private string lastNameValue;
public string LastName
{
get { return lastNameValue; }
set
{
lastNameValue = value;
// Call NotifyPropertyChanged when the property is updated
NotifyPropertyChanged("LastName");
}
}
// Declare the PropertyChanged event
public event PropertyChangedEventHandler PropertyChanged;
// NotifyPropertyChanged will raise the PropertyChanged event passing the
// source property that is being updated.
public void NotifyPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}

<data:DataGrid AutoGenerateColumns="False" Height="200" HorizontalAlignment="Left" Margin="20,45,0,0" Name="dataGrid1" VerticalAlignment="Top" Width="200" >

<data:DataGrid.Columns>

<data:DataGridTextColumn Header="姓" Binding="{Binding FirstName,Mode=TwoWay}"></data:DataGridTextColumn>

<data:DataGridTextColumn Header="名" Binding="{Binding LastName,Mode=TwoWay}"></data:DataGridTextColumn>

</data:DataGrid.Columns>

</data:DataGrid>

.src_container{background-color:#e7e5dc; width:99%; overflow:hidden; margin:12px 0 12px 0 !important; padding:0px 3px 3px 0px}
.src_container .titlebar{ background-color:#d4dfff; border:1px solid #4f81bd; border-bottom:0; padding:3px 24px; margin:0; width:auto; line-height:120%; overflow:hidden; text-align:left; font-size:12px}
.src_container .toolbar{ display:inline; font-weight:normal; font-size:100%; float:right; cursor:hand; color:#00f; text-align:left; overflow:hidden}
.toolbar span.button{ display:inline; font-weight:normal; font-size:100%; cursor:hand; color:#00f; text-align:left; overflow:hidden; cursor:pointer;}
.src_container div.clientarea{ background-color:white; border:1px solid #4f81bd; margin:0; width:auto !important; width:100%; height:auto; overflow:auto; text-align:left; font-size:12px; font-family: "Courier New","Consolas","Fixedsys",courier,monospace,serif}
.src_container ol.mainarea{ padding:0 0 0 52px; margin:0; background-color:#f7f7ff !important}
.number_show{ padding-left:52px !important; list-style:decimal outside !important}
.number_show li{ list-style:decimal outside !important; border-left:1px dotted #4f81bd}
.number_hide{ padding-left:0px !important; list-style-type:none !important}
.number_hide li{ list-style-type:none !important; border-left:0px}
ol.mainarea li{ display:list-item !important; font-size:12px !important; margin:0 !important; line-height:18px !important; padding:0 0 0 0px !important; background-color:#f7f7ff !important; color:#4f81bd}
ol.mainarea li pre{color:black; line-height:18px; padding:0 0 0 12px !important; margin:0em; background-color:#fff !important}
.linewrap ol.mainarea li pre{white-space:pre-wrap; white-space:-moz-pre-wrapwhite-space:-pre-wrap; white-space:-o-pre-wrap; word-wrap:break-word}
ol.mainarea li pre.alt{ background-color:#f7f7ff !important}

function CopyCode(key){var codeElement=null;var trElements=document.all.tags("ol");var i;for(i=0;i页面Load事件，给datagrid绑定数据源

.src_container{background-color:#e7e5dc; width:99%; overflow:hidden; margin:12px 0 12px 0 !important; padding:0px 3px 3px 0px}
.src_container .titlebar{ background-color:#d4dfff; border:1px solid #4f81bd; border-bottom:0; padding:3px 24px; margin:0; width:auto; line-height:120%; overflow:hidden; text-align:left; font-size:12px}
.src_container .toolbar{ display:inline; font-weight:normal; font-size:100%; float:right; cursor:hand; color:#00f; text-align:left; overflow:hidden}
.toolbar span.button{ display:inline; font-weight:normal; font-size:100%; cursor:hand; color:#00f; text-align:left; overflow:hidden; cursor:pointer;}
.src_container div.clientarea{ background-color:white; border:1px solid #4f81bd; margin:0; width:auto !important; width:100%; height:auto; overflow:auto; text-align:left; font-size:12px; font-family: "Courier New","Consolas","Fixedsys",courier,monospace,serif}
.src_container ol.mainarea{ padding:0 0 0 52px; margin:0; background-color:#f7f7ff !important}
.number_show{ padding-left:52px !important; list-style:decimal outside !important}
.number_show li{ list-style:decimal outside !important; border-left:1px dotted #4f81bd}
.number_hide{ padding-left:0px !important; list-style-type:none !important}
.number_hide li{ list-style-type:none !important; border-left:0px}
ol.mainarea li{ display:list-item !important; font-size:12px !important; margin:0 !important; line-height:18px !important; padding:0 0 0 0px !important; background-color:#f7f7ff !important; color:#4f81bd}
ol.mainarea li pre{color:black; line-height:18px; padding:0 0 0 12px !important; margin:0em; background-color:#fff !important}
.linewrap ol.mainarea li pre{white-space:pre-wrap; white-space:-moz-pre-wrapwhite-space:-pre-wrap; white-space:-o-pre-wrap; word-wrap:break-word}
ol.mainarea li pre.alt{ background-color:#f7f7ff !important}

显示行号复制代码？这是一段程序代码。

void MainPage_Loaded(object sender, RoutedEventArgs e)

Person info1 = new Person();

info1.FirstName = "a";

info1.LastName = "aaa";

Person info2 = new Person();

info2.FirstName = "b";

info2.LastName = "bbb";

listPerson.Add(info1);

listPerson.Add(info2);

this.dataGrid1.ItemsSource = listPerson;

.src_container{background-color:#e7e5dc; width:99%; overflow:hidden; margin:12px 0 12px 0 !important; padding:0px 3px 3px 0px}
.src_container .titlebar{ background-color:#d4dfff; border:1px solid #4f81bd; border-bottom:0; padding:3px 24px; margin:0; width:auto; line-height:120%; overflow:hidden; text-align:left; font-size:12px}
.src_container .toolbar{ display:inline; font-weight:normal; font-size:100%; float:right; cursor:hand; color:#00f; text-align:left; overflow:hidden}
.toolbar span.button{ display:inline; font-weight:normal; font-size:100%; cursor:hand; color:#00f; text-align:left; overflow:hidden; cursor:pointer;}
.src_container div.clientarea{ background-color:white; border:1px solid #4f81bd; margin:0; width:auto !important; width:100%; height:auto; overflow:auto; text-align:left; font-size:12px; font-family: "Courier New","Consolas","Fixedsys",courier,monospace,serif}
.src_container ol.mainarea{ padding:0 0 0 52px; margin:0; background-color:#f7f7ff !important}
.number_show{ padding-left:52px !important; list-style:decimal outside !important}
.number_show li{ list-style:decimal outside !important; border-left:1px dotted #4f81bd}
.number_hide{ padding-left:0px !important; list-style-type:none !important}
.number_hide li{ list-style-type:none !important; border-left:0px}
ol.mainarea li{ display:list-item !important; font-size:12px !important; margin:0 !important; line-height:18px !important; padding:0 0 0 0px !important; background-color:#f7f7ff !important; color:#4f81bd}
ol.mainarea li pre{color:black; line-height:18px; padding:0 0 0 12px !important; margin:0em; background-color:#fff !important}
.linewrap ol.mainarea li pre{white-space:pre-wrap; white-space:-moz-pre-wrapwhite-space:-pre-wrap; white-space:-o-pre-wrap; word-wrap:break-word}
ol.mainarea li pre.alt{ background-color:#f7f7ff !important}

function CopyCode(key){var codeElement=null;var trElements=document.all.tags("ol");var i;for(i=0;iButton事件改变数据源数据

.src_container{background-color:#e7e5dc; width:99%; overflow:hidden; margin:12px 0 12px 0 !important; padding:0px 3px 3px 0px}
.src_container .titlebar{ background-color:#d4dfff; border:1px solid #4f81bd; border-bottom:0; padding:3px 24px; margin:0; width:auto; line-height:120%; overflow:hidden; text-align:left; font-size:12px}
.src_container .toolbar{ display:inline; font-weight:normal; font-size:100%; float:right; cursor:hand; color:#00f; text-align:left; overflow:hidden}
.toolbar span.button{ display:inline; font-weight:normal; font-size:100%; cursor:hand; color:#00f; text-align:left; overflow:hidden; cursor:pointer;}
.src_container div.clientarea{ background-color:white; border:1px solid #4f81bd; margin:0; width:auto !important; width:100%; height:auto; overflow:auto; text-align:left; font-size:12px; font-family: "Courier New","Consolas","Fixedsys",courier,monospace,serif}
.src_container ol.mainarea{ padding:0 0 0 52px; margin:0; background-color:#f7f7ff !important}
.number_show{ padding-left:52px !important; list-style:decimal outside !important}
.number_show li{ list-style:decimal outside !important; border-left:1px dotted #4f81bd}
.number_hide{ padding-left:0px !important; list-style-type:none !important}
.number_hide li{ list-style-type:none !important; border-left:0px}
ol.mainarea li{ display:list-item !important; font-size:12px !important; margin:0 !important; line-height:18px !important; padding:0 0 0 0px !important; background-color:#f7f7ff !important; color:#4f81bd}
ol.mainarea li pre{color:black; line-height:18px; padding:0 0 0 12px !important; margin:0em; background-color:#fff !important}
.linewrap ol.mainarea li pre{white-space:pre-wrap; white-space:-moz-pre-wrapwhite-space:-pre-wrap; white-space:-o-pre-wrap; word-wrap:break-word}
ol.mainarea li pre.alt{ background-color:#f7f7ff !important}

显示行号复制代码？这是一段程序代码。

private void button1_Click(object sender, RoutedEventArgs e)

listPerson[0].FirstName = "ccccccc";

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silverlight 数据绑定 数据源改变时自动传播到目标

silverlight 数据绑定数据源改变时自动传播到目标