vb.net .NET 4.5 中 Textmode Time 属性上的文本在代码隐藏中消失
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Text on Textmode Time property in .NET 4.5 disappears in Code Behind
提问by Emi
I read many topics about this but I'm having a problem with the Textmode = "Time" property on .NET 4.5, as well.
我阅读了很多关于此的主题，但我也遇到了 .NET 4.5 上的 Textmode = "Time" 属性问题。
I have this on aspx side:
我在aspx方面有这个：
<asp:TextBox runat="server" ID="txtBoxStartTime" TextMode="Time"></asp:TextBox>
On vb.net side, when I try to get the Text value from this textbox, I have nothing but empty string ("").
在 vb.net 方面，当我尝试从此文本框中获取 Text 值时，我只有空字符串 ("")。
CDate(txtBoxStartTime.Text)
On client-side, in webInspector I can easily take the value from the textbox, but I need it in server-side...
在客户端，在 webInspector 中，我可以轻松地从文本框中获取值，但我在服务器端需要它......
Even though I try with HTML5 tags with runat="server" I encounter the same problem.
即使我尝试使用带有 runat="server" 的 HTML5 标签，我也遇到了同样的问题。
I've noticed the problem is the same with all of the Textmode Property on Framework 4.5
我注意到问题与 Framework 4.5 上的所有 Textmode 属性相同
Any suggestions/solutions on this? I truly appreciate your input!
对此有任何建议/解决方案吗？我真的很感谢您的意见！
Thanks!
谢谢！
回答by Abdu Imam
Use this Attribute: "format"
使用此属性：“格式”
<asp:TextBox ID="txtTime" runat="server" TextMode="Time" format="HH:mm" />
it will return the format of 24 for hours.
它将返回 24 小时的格式。
if your value is 10:00 PM then in server side the (txtTime.Text) value will be "22:00".
如果您的值是 10:00 PM，那么在服务器端 (txtTime.Text) 值将是“22:00”。
I Test it in Chrome and it's work
我在 Chrome 中测试它，它的工作
回答by Adam Wall
Use the HH:mmtime format:
使用HH:mm时间格式：
Time.Text = SomeTime.ToString("HH:mm");
回答by alessandro
SingleLine mode displays the TextBox control as a single row. If the user enters text that exceeds the physical size of the TextBox control, the text will scroll horizontally. MultiLine mode displays the height of the TextBox based on the Rows property, and allows data entry on multiple lines. The text will automatically wrap if the Wrap property is set to true. If the user enters text that exceeds the physical size of the TextBox, the text will scroll accordingly and scroll bars will appear. The behavior of Password mode is similar to SingleLine mode except that all characters entered in the TextBox control are masked and are not saved in view state.
SingleLine 模式将 TextBox 控件显示为单行。如果用户输入的文本超过 TextBox 控件的物理大小，则文本将水平滚动。MultiLine 模式根据 Rows 属性显示 TextBox 的高度，并允许在多行上输入数据。如果 Wrap 属性设置为 true，文本将自动换行。如果用户输入的文本超过 TextBox 的物理大小，文本将相应滚动并出现滚动条。Password 模式的行为与 SingleLine 模式类似，只是在 TextBox 控件中输入的所有字符都被屏蔽并且不保存在视图状态中。
and then
进而
The remaining options correspond to type attribute values for the input element in the HTML5 specification.
其余选项对应于 HTML5 规范中 input 元素的 type 属性值。
So there is not any change to server side behaviours of textbox, the following code works as expected
因此文本框的服务器端行为没有任何变化，以下代码按预期工作
Markup
标记
<asp:TextBox runat="server" TextMode="Time" ID="test"></asp:TextBox>
<asp:Button runat="server" ID="btn" Text="ok" />
C# code behind
后面的 C# 代码
protected void Page_Load(object sender, EventArgs e)
{
string value = test.Text;
}
回答by Emi
So, to have an answer, here's the code it's on my Page.Load (for testing)
所以，要得到答案，这是我的 Page.Load 上的代码（用于测试）
You can see there's not value on txtBoxStarTime.Text
您可以看到 txtBoxStarTime.Text 上没有值
For my situation, I have this inside an update panel:
对于我的情况，我在更新面板中有这个：
<asp:TextBox runat="server" ID="txtBoxStartTime" TextMode="Time" Width="102px"></asp:TextBox>
<asp:TextBox runat="server" ID="txtBoxEndTime" TextMode="Time" Width="102px"></asp:TextBox>
<asp:Button CssClass="positive" ID="btnOtherSendRequest" runat="server" Text=" Send Request" ToolTip="The selected request would be sent to X" OnClick="btnOtherSendRequest_Click"/>
This is the code in VB.NET:
这是VB.NET中的代码：
Protected Sub btnOtherSendRequest_Click(sender As Object, e As EventArgs)
Try
lblSubmitted.Text = ""
lblValidateNotInfo.Text = ""
hdnRequestType.Value = "OTH"
Dim messageSuccessful As String = "Thank you for submitting your Request(s)!"
Dim messageUnSuccessful As String = "The Request was not submitted due to some errors. Please 'Go Back' and re-send!"
Select Case ddlRequest.SelectedValue
Case "18" ' Schedule Update Call
If Not (txtBoxStartDate.Text.Length > 0 And txtBoxEndDate.Text.Length > 0 And IsDate(txtBoxStartDate.Text) And IsDate(txtBoxEndDate.Text)) Then
' AI - if dates are in invalid format
ScriptManager.RegisterStartupScript(Me, Me.GetType, "AlertScript", "alert ('Please make sure the dates are in a valid format!');", True)
Exit Sub
ElseIf Not CDate(txtBoxStartDate.Text).CompareTo(Date.Now) > 0 Then
' AI - Start Date must be greater than today.
ScriptManager.RegisterStartupScript(Me, Me.GetType, "AlertScript", "alert ('""Start"" date must be a future date!');", True)
Exit Sub
ElseIf Not CDate(txtBoxEndDate.Text).CompareTo(CDate(txtBoxStartDate.Text)) >= 0 Then
' AI - Start Date must be greater than today.
ScriptManager.RegisterStartupScript(Me, Me.GetType, "AlertScript", "alert ('""End"" date must be the same as the ""Start"" date or a date after the ""Start"" date!');", True)
Exit Sub
ElseIf CDate(txtBoxStartDate.Text).DayOfWeek = DayOfWeek.Saturday Or CDate(txtBoxStartDate.Text).DayOfWeek = DayOfWeek.Sunday Or CDate(txtBoxEndDate.Text).DayOfWeek = DayOfWeek.Saturday Or CDate(txtBoxEndDate.Text).DayOfWeek = DayOfWeek.Sunday Then
ScriptManager.RegisterStartupScript(Me, Me.GetType, "AlertScript", "alert ('Weekends excluded!');", True)
Exit Sub
Else
lblSubmitted.Text = messageSuccessful
End If
Case "19" ' Request Training Call
Case "20" ' Request Call from Cust. Service
Case "21" ' Other Request
If txtBoxOther.Text <> "" Then
lblSubmitted.Text = messageSuccessful
Else
lblSubmitted.Text = messageUnSuccessful
ScriptManager.RegisterStartupScript(Me, Me.GetType, "AlertScript", "alert ('Please enter your request into the textarea first!');", True)
txtBoxOther.Focus()
Exit Sub
End If
End Select
Call sendRequest()
Call JSEffect(True)
Catch ex As Exception
lblMessage.Text = "Error when taking the request to be inserted - " & ex.Message
Finally
hlServCenterPend.Text = "Pending Requests (" & getServCenterStatus("PEND").ToString & ")"
hlServCenterComp.Text = "Completed Requests (" & getServCenterStatus("COMP").ToString & ")"
End Try
End Sub
And Here I got the error:
在这里我得到了错误：
Public Sub sendRequest(Optional pid As Integer = 0, Optional claim As Integer = 0, Optional insured As Integer = 0)
Dim req As New cls_services.request
Try
req.clinicID = CInt(MyMod.FetchStoredData("ClinicID"))
req.pid = pid
req.type = CInt(ddlRequest.SelectedValue)
Select Case req.type
Case 1, 11, 12, 13, 14
req.status = "COMP"
Case Else
req.status = "PEND"
End Select
req.claimID = claim
req.insuranceID = insured
req.dueDate = req.getDueDate(req.type)
req.other = Trim(txtBoxOther.Text)
Select Case req.type
Case 18
req.fromDate = CDate(txtBoxStartDate.Text)
req.fromTime = CDate(txtBoxStartTime.Text)//ERROR HERE! - EXCEPTION
req.toDate = CDate(txtBoxEndDate.Text)
req.toTime = CDate(txtBoxEndTime.Text)
End Select
req.fax = Trim(txtFaxTreatmentRecords.Text)
req.createUser = Request.ServerVariables("AUTH_USER")
My solution here, is trying to store the value from textbox in a hiddenfield, then access in codebehind... but it is still a "last-measure" solution.
我的解决方案是尝试将文本框中的值存储在隐藏字段中，然后在代码隐藏中访问......但它仍然是“最后措施”的解决方案。
The fact is, as I said - On PostBack - the "Text" value disappears. Don't know why.
事实是，正如我所说的——在回发时——“文本”值消失了。不知道为什么。
Still waiting for suggestions! :)
还在等待建议！:)
回答by Emi
So,
所以，
I've been struggling with this for some hours. I did not find any "code-behind" solution. So I come with a solution. Maybe it will help you in some ways:
我已经为此苦苦挣扎了几个小时。我没有找到任何“代码隐藏”解决方案。所以我提出了一个解决方案。也许它会在某些方面帮助你：
Using JavaScript to store the value into a hiddenfield, like this:
使用 JavaScript 将值存储到隐藏字段中，如下所示：
<asp:TextBox runat="server" ID="txtBoxStartTime" TextMode="Time" Width="102px" onchange="storeStartTime()"></asp:TextBox>
<asp:HiddenField runat="server" ID="hdnStartTime"/>
JavaScript Function:
JavaScript 函数：
function storeStartTime() {
var x = document.getElementById("ctl00_mainPageBody_txtBoxStartTime");
var y = document.getElementById("ctl00_mainPageBody_hdnStartTime");
y.value = x.value;
alert(y.value);
}
}
Hope it will help if you encounter this problem!
如果您遇到此问题，希望对您有所帮助！
回答by killQuotes
Have you tried placing this in your page_load?
你有没有试过把它放在你的 page_load 中？
txtBoxStartTime.Attributes["type"] = "Time"
