DetailsViewModeEventArgs 类
定义
重要
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为 ModeChanging 事件提供数据。
public ref class DetailsViewModeEventArgs : System::ComponentModel::CancelEventArgspublic class DetailsViewModeEventArgs : System.ComponentModel.CancelEventArgstype DetailsViewModeEventArgs = class
inherit CancelEventArgsPublic Class DetailsViewModeEventArgs
Inherits CancelEventArgs- 继承
示例
下面的代码示例演示了如何在控件转换为编辑模式时DetailsView，使用DetailsViewModeEventArgs传递给 事件的事件处理程序ModeChanging的对象来隐藏寻呼行。
<%@ Page language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void CustomerDetailsView_ModeChanging(Object sender, DetailsViewModeEventArgs e)
{
// Use the NewMode property to determine the mode to which the
// DetailsView control is transitioning.
switch (e.NewMode)
{
case DetailsViewMode.Edit:
// Hide the pager row and clear the Label control
// when transitioning to edit mode.
CustomerDetailsView.AllowPaging = false;
MessageLabel.Text = "";
break;
case DetailsViewMode.ReadOnly:
// Display the pager row and confirmation message
// when transitioning to edit mode.
CustomerDetailsView.AllowPaging = true;
if (e.CancelingEdit)
{
MessageLabel.Text = "Update canceled.";
}
else
{
MessageLabel.Text = "Update completed.";
}
break;
case DetailsViewMode.Insert:
// Cancel the mode change if the DetailsView
// control attempts to transition to insert
// mode.
e.Cancel = true;
break;
default:
MessageLabel.Text = "Unsupported mode.";
break;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewModeEventArgs Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DetailsViewModeEventArgs Example</h3>
<asp:detailsview id="CustomerDetailsView"
datasourceid="DetailsViewSource"
datakeynames="CustomerID"
autogeneraterows="true"
autogenerateeditbutton="true"
allowpaging="true"
onmodechanging="CustomerDetailsView_ModeChanging"
runat="server">
</asp:detailsview>
<br/><br/>
<asp:label id="MessageLabel"
forecolor="Red"
runat="server"/>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the web.config file. -->
<asp:sqldatasource id="DetailsViewSource"
selectcommand="Select [CustomerID], [CompanyName], [Address],
[City], [PostalCode], [Country] From [Customers]"
updatecommand="Update [Customers] Set
[CompanyName]=@CompanyName, [Address]=@Address,
[City]=@City, [PostalCode]=@PostalCode,
[Country]=@Country
Where [CustomerID]=@CustomerID"
connectionstring=
"<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
<%@ Page language="VB" autoeventwireup="false" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Sub CustomerDetailsView_ModeChanging(ByVal sender As Object, ByVal e As DetailsViewModeEventArgs) Handles CustomerDetailsView.ModeChanging
' Use the NewMode property to determine the mode to which the
' DetailsView control is transitioning.
Select Case e.NewMode
Case DetailsViewMode.Edit
' Hide the pager row and clear the Label control
' when transitioning to edit mode.
CustomerDetailsView.AllowPaging = False
MessageLabel.Text = ""
Case DetailsViewMode.ReadOnly
' Display the pager row and confirmation message
' when transitioning to edit mode.
CustomerDetailsView.AllowPaging = True
If e.CancelingEdit Then
MessageLabel.Text = "Update canceled."
Else
MessageLabel.Text = "Update completed."
End If
Case DetailsViewMode.Insert
' Cancel the mode change if the DetailsView
' control attempts to transition to insert
' mode.
e.Cancel = True
Case Else
MessageLabel.Text = "Unsupported mode."
End Select
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewModeEventArgs Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DetailsViewModeEventArgs Example</h3>
<asp:detailsview id="CustomerDetailsView"
datasourceid="DetailsViewSource"
datakeynames="CustomerID"
autogeneraterows="true"
autogenerateeditbutton="true"
allowpaging="true"
runat="server">
</asp:detailsview>
<br/><br/>
<asp:label id="MessageLabel"
forecolor="Red"
runat="server"/>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the web.config file. -->
<asp:sqldatasource id="DetailsViewSource"
selectcommand="Select [CustomerID], [CompanyName], [Address],
[City], [PostalCode], [Country] From [Customers]"
updatecommand="Update [Customers] Set
[CompanyName]=@CompanyName, [Address]=@Address,
[City]=@City, [PostalCode]=@PostalCode,
[Country]=@Country
Where [CustomerID]=@CustomerID"
connectionstring=
"<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
注解
当ModeChangingDetailsView控件尝试在编辑、插入和只读模式之间更改，但在模式实际更改之前，将引发 该事件。 这允许你提供一个事件处理程序，用于执行自定义例程，例如，每当发生此事件时，为特定模式配置 DetailsView 控件或取消模式更改。
对象 DetailsViewModeEventArgs 将传递给事件处理程序，该处理程序允许你确定控件要更改的模式 DetailsView 、确定事件是否 ModeChanging 因用户取消编辑操作而引发，或者指示应取消插入操作。 若要确定新模式，请使用 NewMode 属性。 还可以使用 NewMode 属性将其设置为枚举值之一 DetailsViewMode ，将其更改为备用模式。
CancelingEdit使用 属性确定用户是否取消了编辑操作。 若要取消插入操作，请将 Cancel 属性设置为 true。
有关如何处理事件的详细信息，请参阅 处理和引发事件。
有关 DetailsViewModeEventArgs 类的实例的初始属性值列表，请参见 DetailsViewModeEventArgs 构造函数。
构造函数
| DetailsViewModeEventArgs(DetailsViewMode, Boolean) |
初始化 DetailsViewModeEventArgs 类的新实例。 |
属性
| Cancel |
获取或设置指示是否应取消事件的值。 (继承自 CancelEventArgs) |
| CancelingEdit |
获取一个布尔值，指示是否由于用户取消编辑操作而引发了 ModeChanging 事件。 |
| NewMode |
获取或设置 DetailsView 控件正在转换到的模式。 |
方法
| Equals(Object) |
确定指定对象是否等于当前对象。 (继承自 Object) |
| GetHashCode() |
作为默认哈希函数。 (继承自 Object) |
| GetType() |
获取当前实例的 Type。 (继承自 Object) |
| MemberwiseClone() |
创建当前 Object 的浅表副本。 (继承自 Object) |
| ToString() |
返回表示当前对象的字符串。 (继承自 Object) |
