FormView.CurrentMode 属性
定义
重要
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获取 FormView 控件的当前数据输入模式。
public:
property System::Web::UI::WebControls::FormViewMode CurrentMode { System::Web::UI::WebControls::FormViewMode get(); };[System.ComponentModel.Browsable(false)]
public System.Web.UI.WebControls.FormViewMode CurrentMode { get; }[<System.ComponentModel.Browsable(false)>]
member this.CurrentMode : System.Web.UI.WebControls.FormViewModePublic ReadOnly Property CurrentMode As FormViewMode属性值
FormViewMode 值之一。
- 属性
示例
下面的示例演示如何使用 CurrentMode 属性来确定控件是 FormView 处于编辑、插入还是只读模式。 如果用户尝试在控件编辑更多时 FormView 导航到另一条记录，则取消分页操作。
<%@ 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 EmployeeFormView_OnPageIndexChanging(Object sender, FormViewPageEventArgs e)
{
// Cancel the paging operation if the user attempts to navigate
// to another record while the FormView control is in edit mode.
if (EmployeeFormView.CurrentMode == FormViewMode.Edit)
{
e.Cancel = true;
MessageLabel.Text =
"Please complete the update operation before navigating to another record.";
}
}
void EmployeeFormView_OnModeChanged(Object sender, EventArgs e)
{
// Clear the message label.
MessageLabel.Text = "";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>FormView Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>FormView Example</h3>
<asp:formview id="EmployeeFormView"
datasourceid="EmployeeSource"
allowpaging="true"
datakeynames="EmployeeID"
emptydatatext="No employees found."
onpageindexchanging="EmployeeFormView_OnPageIndexChanging"
onmodechanged="EmployeeFormView_OnModeChanged"
runat="server">
<rowstyle backcolor="LightGreen"
wrap="false"/>
<editrowstyle backcolor="LightBlue"
wrap="false"/>
<itemtemplate>
<table>
<tr>
<td rowspan="4">
<asp:image id="EmployeeImage"
imageurl='<%# Eval("PhotoPath") %>'
alternatetext='<%# Eval("LastName") %>'
runat="server"/>
</td>
<td colspan="2">
</td>
</tr>
<tr>
<td>
<b>Name:</b>
</td>
<td>
<%# Eval("FirstName") %> <%# Eval("LastName") %>
</td>
</tr>
<tr>
<td>
<b>Title:</b>
</td>
<td>
<%# Eval("Title") %>
</td>
</tr>
<tr>
<td colspan="2">
<asp:linkbutton id="Edit"
text="Edit"
commandname="Edit"
runat="server"/>
</td>
</tr>
</table>
</itemtemplate>
<edititemtemplate>
<table>
<tr>
<td rowspan="4">
<asp:image id="EmployeeEditImage"
imageurl='<%# Eval("PhotoPath") %>'
alternatetext='<%# Eval("LastName") %>'
runat="server"/>
</td>
<td colspan="2">
</td>
</tr>
<tr>
<td>
<b>Name:</b>
</td>
<td>
<asp:textbox id="FirstNameUpdateTextBox"
text='<%# Bind("FirstName") %>'
runat="server"/>
<asp:textbox id="LastNameUpdateTextBox"
text='<%# Bind("LastName") %>'
runat="server"/>
</td>
</tr>
<tr>
<td>
<b>Title:</b>
</td>
<td>
<asp:textbox id="TitleUpdateTextBox"
text='<%# Bind("Title") %>'
runat="server"/>
</td>
</tr>
<tr>
<td colspan="2">
<asp:linkbutton id="UpdateButton"
text="Update"
commandname="Update"
runat="server"/>
<asp:linkbutton id="CancelButton"
text="Cancel"
commandname="Cancel"
runat="server"/>
</td>
</tr>
</table>
</edititemtemplate>
</asp:formview>
<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="EmployeeSource"
selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]"
updatecommand="Update [Employees] Set [LastName]=@LastName, [FirstName]=@FirstName, [Title]=@Title Where [EmployeeID]=@EmployeeID"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
<%@ Page language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Sub EmployeeFormView_OnPageIndexChanging(ByVal sender As Object, ByVal e As FormViewPageEventArgs)
' Cancel the paging operation if the user attempts to navigate
' to another record while the FormView control is in edit mode.
If EmployeeFormView.CurrentMode = FormViewMode.Edit Then
e.Cancel = True
MessageLabel.Text = _
"Please complete the update operation before navigating to another record."
End If
End Sub
Sub EmployeeFormView_OnModeChanged(ByVal sender As Object, ByVal e As EventArgs)
' Clear the message label.
MessageLabel.Text = ""
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>FormView Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>FormView Example</h3>
<asp:formview id="EmployeeFormView"
datasourceid="EmployeeSource"
allowpaging="true"
datakeynames="EmployeeID"
emptydatatext="No employees found."
onpageindexchanging="EmployeeFormView_OnPageIndexChanging"
onmodechanged="EmployeeFormView_OnModeChanged"
runat="server">
<rowstyle backcolor="LightGreen"
wrap="false"/>
<editrowstyle backcolor="LightBlue"
wrap="false"/>
<itemtemplate>
<table>
<tr>
<td rowspan="4">
<asp:image id="EmployeeImage"
imageurl='<%# Eval("PhotoPath") %>'
alternatetext='<%# Eval("LastName") %>'
runat="server"/>
</td>
<td colspan="2">
</td>
</tr>
<tr>
<td>
<b>Name:</b>
</td>
<td>
<%# Eval("FirstName") %> <%# Eval("LastName") %>
</td>
</tr>
<tr>
<td>
<b>Title:</b>
</td>
<td>
<%# Eval("Title") %>
</td>
</tr>
<tr>
<td colspan="2">
<asp:linkbutton id="Edit"
text="Edit"
commandname="Edit"
runat="server"/>
</td>
</tr>
</table>
</itemtemplate>
<edititemtemplate>
<table>
<tr>
<td rowspan="4">
<asp:image id="EmployeeEditImage"
imageurl='<%# Eval("PhotoPath") %>'
alternatetext='<%# Eval("LastName") %>'
runat="server"/>
</td>
<td colspan="2">
</td>
</tr>
<tr>
<td>
<b>Name:</b>
</td>
<td>
<asp:textbox id="FirstNameUpdateTextBox"
text='<%# Bind("FirstName") %>'
runat="server"/>
<asp:textbox id="LastNameUpdateTextBox"
text='<%# Bind("LastName") %>'
runat="server"/>
</td>
</tr>
<tr>
<td>
<b>Title:</b>
</td>
<td>
<asp:textbox id="TitleUpdateTextBox"
text='<%# Bind("Title") %>'
runat="server"/>
</td>
</tr>
<tr>
<td colspan="2">
<asp:linkbutton id="UpdateButton"
text="Update"
commandname="Update"
runat="server"/>
<asp:linkbutton id="CancelButton"
text="Cancel"
commandname="Cancel"
runat="server"/>
</td>
</tr>
</table>
</edititemtemplate>
</asp:formview>
<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="EmployeeSource"
selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]"
updatecommand="Update [Employees] Set [LastName]=@LastName, [FirstName]=@FirstName, [Title]=@Title Where [EmployeeID]=@EmployeeID"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
注解
使用 CurrentMode 属性确定控件是 FormView 处于编辑、插入还是只读模式。 下表列出了不同的模式值。
| “模式” | 说明 |
|---|---|
FormViewMode.Edit |
控件 FormView 处于编辑模式，允许用户更新记录的值。 |
FormViewMode.Insert |
控件 FormView 处于插入模式，允许用户向数据源添加新记录。 |
FormView.ReadOnly |
控件 FormView 处于只读模式，这是正常的显示模式。 |
单击“新建”、“更新”、“插入”、“删除”或“取消”命令按钮时，通常由 FormView 控件自动设置此值。 当 FormView 控件更改模式以响应操作时，将引发下表中的事件。 这样，就可以创建自定义事件处理程序，该处理程序在事件发生时执行相应的例程。
| 事件 | 说明 |
|---|---|
| ModeChanged | 当 FormView 控件更改模式时发生，但在模式更改后发生。 每当控件更改模式时 FormView ，此事件通常用于执行任务。 |
| ModeChanging | 当 FormView 控件更改模式，但在模式更改之前发生。 此事件通常用于取消模式更改。 |
注意 使用 ChangeMode 该方法以编程方式更改模式时，不会引发这些事件。