在我的项目中,有3个用户控件; BasicContact,BasicDetail和ActionTime。它们位于EditOrder.aspx页面中。
BasicContact中有“ReportDate”属性(日期类型),BasicDetail中有RadioButtonList“rdl_Priority”(带有“prio_id”字段的整数值),ActionTime中有“CheckDate”属性。 ReportDate值派生自txt_ReportDate和txt_ReportTime,CheckDate值派生自txt_CheckDate和txt_CheckTime。
我的目标是在将日期添加到ReportDate之后计算Checkdate,然后单击radiobuttonlist。 Checkdate将从ReportDate(日期)+ SLAHour(小时,来自“GetSLAHour”方法,其中输入为prio_id)计算,然后在txt_CheckDate和txt_CheckTime中设置文本。
现在,我可以使用Postback完成此任务。我创建自定义事件并在RadioButtonList selectedIndexchanged方法中引发它。之后,事件在EditOrder页面后面的代码中处理。这是我的代码。
BasicDetail - RadioButtonList
<asp:RadioButtonList ID="rdl_Priority" runat="server" RepeatDirection="Horizontal" AutoPostBack="true" />
BasicDetail - codeBehind
Public Event priorityClicked As System.EventHandler
Private Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
If Not IsPostBack Then SetupList()
End Sub
Private Sub SetupList()
Dim ctx As New StsDataContext
With rdl_Priority
Dim Result = (From r In ctx.Priorities Order By r.display_order)
If Result.Count > 0 Then
.DataTextField = "prio_name"
.DataValueField = "prio_id"
.DataSource = Result
.DataBind()
Else
lbl_Priority.Visible = False
rdl_Priority.Visible = False
End If
End With
End Sub
Protected Sub rdl_Priority_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles rdl_Priority.SelectedIndexChanged
RaiseEvent priorityClicked(sender, e)
End Sub
EditOrder - codeBehind
Private Sub BasicDetail_priorityClicked(ByVal sender As Object, ByVal e As System.EventArgs) Handles BasicDetail.priorityClicked
Dim reportDate As Date? = BasicContact.ReportDate
Dim SLAHour As Integer? = GetSLAHour(BasicDetail.PriorityId)
If reportDate.HasValue AndAlso SLAHour.HasValue Then
ActionTime.CheckDate = CDate(reportDate).AddHours(CDbl(SLAHour))
End If
End Sub
但是,我不希望页面刷新(没有回发)。我不知道如何从javascript中调用函数或子函数。我尝试过PageMethod,但它在运行时导致错误,说明该方法不受支持。无论如何,如果有一个比从javascript调用代码隐藏更好的方法,请告诉我。
提前致谢
答案 0 :(得分:0)
好的抱歉,这是我的解决方案
由于目前我使用PageMethod来解决这个问题,我不再需要代码隐藏的引发事件功能,所以我删除了我发布的所有代码来询问我自己的问题。
首先,我在后面的BasicDetail代码中为RadioButtonList中的每个项添加了javascript函数
BasicDetail - 背后的代码
Private Sub rdl_Priority_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles rdl_Priority.DataBound
For Each li As ListItem In rdl_Priority.Items
Dim slaHour As Integer? = GetSLAHour(li.Value)
li.Attributes.Add("onclick", "return CalCheckDate(" & If(slaHour.HasValue, CStr(slaHour), "null") & ");")
Next
End Sub
添加到每个按钮的“CalCheckDate”功能在EditOrder页面(用户控件的父页面)中实现
EditOrder.aspx
<script type="text/javascript">
function CalCheckDate(hour) {
var hid_ServId = document.getElementById('<%=hid_ServId.ClientID%>');
var txt_reportDate = document.getElementById('<%=BasicContact.ReportDateTextName%>');
var txt_reportTime = document.getElementById('<%=BasicContact.ReportTimeTextName%>');
PageMethods.GetCheckDateTime(hid_ServId.value, txt_reportDate.value, txt_reportTime.value, hour, OnGetCheckDateComplete, OnGetCheckDateError);
}
function OnGetCheckDateComplete(result) {
var txt_checkDate = document.getElementById('<%=ActionTime.CheckDateTextName%>');
var txt_checkTime = document.getElementById('<%=ActionTime.CheckTimeTextName%>');
var chkDateTime = result.split(" ");
txt_checkDate.value = chkDateTime[0];
txt_checkTime.value = chkDateTime[1];
}
function OnGetCheckDateError(e)
{
alert(e._message);
}
</script>
用户控件中的子控件,例如BasicContact中的txt_ReportDate,可以通过在BasicContact中创建属性来导出,如下所示:
BasicContact - 代码背后
Public ReadOnly Property ReportDateTextName() As String
Get
Return txt_ReportDate.ClientID
End Get
End Property
此属性在“CalCheckDate”函数中用于获取其值并将其传递给PageMethod函数。其他控件可以以相同的方式派生。
最后一步是编辑PageMethods函数,“GetCheckDateTime”,在EditOrder代码后面
EditOrder - 背后的代码
<System.Web.Services.WebMethod()> _
Public Shared Function GetCheckDateTime(ByVal servId As String, ByVal ReportDate As String, ByVal ReportTime As String, ByVal hour As String) As String
Dim checkDate As String, checkTime As String
'************************************************************************
'Calculate check and time date from input ReportDate, ReportTime and hour
'************************************************************************
Return checkDate & " " & checkTime
End Function
结果返回到javascript中的“OnGetCheckDateComplete”函数(如果有异常则返回“OnGetCheckDateError”)。在这里,我拆分String并使用其值在文本框中设置文本。