使用字段掩码并将光标强制向左移动

Question

这是不是等同于这个问题,但它是非常相似的.

我正在使用ASP.Net并且需要或多或少地做同样的事情,但希望它可以在ASP方面完成.

我的相关代码如下:

<td style="line-height: 230%;">
    <asp:TextBox ID="txtePro" runat="server" CssClass="textbox" Font-Size="Small" Height="18px" Width="100px" Visible="False" Wrap="False" OnTextChanged="txtEPro_OnLeave" AutoPostBack="true"></asp:TextBox>
    <asp:MaskedEditExtender ID="MeeePro" runat="server" Mask="9999999" MaskType="None" TargetControlID="txtePro" PromptCharacter="_" />
    <asp:MaskedEditExtender ID="MeePRD" runat="server" Mask="999999" MaskType="None" TargetControlID="txtePro" PromptCharacter="_" />
    <asp:RegularExpressionValidator Display="Dynamic" ControlToValidate="txtePro" ID="RevePro" ValidationExpression="^[\s\S]{7,7}$" runat="server" ErrorMessage="7 Digits required." ForeColor="White" Font-Size="X-Small"></asp:RegularExpressionValidator>
    <asp:RegularExpressionValidator Display="Dynamic" ControlToValidate="txtePro" ID="RevPRD" ValidationExpression="^[\s\S]{6,}$" runat="server" ErrorMessage="6 Digits required." ForeColor="White" Font-Size="X-Small"></asp:RegularExpressionValidator>
    <asp:TextBox ID="hdntxtePro" runat="server" CssClass="textbox" Font-Size="Small" Height="18px" Width="100px" Visible="False" Wrap="False"></asp:TextBox>
    <asp:DropDownList ID="ddlCIT" runat="server" AutoPostBack="True" CssClass="textbox" Visible="false" Height="20px" OnSelectedIndexChanged="ddlCIT_SelectedIndexChanged" Width="100px"></asp:DropDownList>
    <asp:TextBox ID="txtCIT" runat="server" CssClass="textbox" Height="18px" Width="100px" Visible="False" Font-Size="Small" Wrap="False"></asp:TextBox>
    <asp:RegularExpressionValidator Display="Dynamic" ControlToValidate="txtCIT" ID="RevCIT" ValidationExpression="^[\s\S]{4,}$" runat="server" ErrorMessage="4 Digits required." ForeColor="White" Font-Size="X-Small"></asp:RegularExpressionValidator>
    <asp:MaskedEditExtender ID="meeCIT" runat="server" MaskType="Number" Mask="99.99" TargetControlID="txtCIT" PromptCharacter="_" InputDirection="LeftToRight" />
    <asp:TextBox ID="txtClientID" runat="server" CssClass="textbox" Height="18px" Width="100px" Visible="False" Font-Size="Small" Wrap="False" OnTextChanged="txtClientID_OnLeave" AutoPostBack="true" MaxLength="5"></asp:TextBox>
    <asp:MaskedEditExtender ID="meeClientID" runat="server" MaskType="Number" Mask="99999" TargetControlID="txtClientID" PromptCharacter="_"  InputDirection="LeftToRight" AutoComplete="False" UserTimeFormat="TwentyFourHour"/>
    <asp:RegularExpressionValidator Display="Dynamic" ControlToValidate="txtClientID" ID="RevClientID" ValidationExpression="^[\s\S]{5,5}$" runat="server" ErrorMessage="5 Digits required." ForeColor="White" Font-Size="X-Small"></asp:RegularExpressionValidator>
    <asp:TextBox ID="hdntxtClientID" runat="server" CssClass="textbox" Height="18px" Width="100px" Visible="False" Font-Size="Small" Wrap="False"></asp:TextBox>
    <asp:TextBox ID="txtElasID" runat="server" CssClass="textbox" Height="18px" Width="100px" Wrap="False" Visible="False" Font-Size="Small"></asp:TextBox>
    <asp:MaskedEditExtender ID="meeElas" runat="server" MaskType="None" Mask="99999999" TargetControlID="txtElasID" PromptCharacter="_" />
    <asp:RegularExpressionValidator Display="Dynamic" ControlToValidate="txtElasID" ID="RevElasID" ValidationExpression="^[\s\S]{8,}$" runat="server" ErrorMessage="8 Digits required." ForeColor="White"></asp:RegularExpressionValidator>
    <asp:TextBox ID="txtEffDate" runat="server" CssClass="textbox" Height="18px" Width="100px" Visible="False" Font-Size="Small" TextMode="Date" Wrap="False"></asp:TextBox>
    <asp:RangeValidator ID="rvDate" runat="server" ControlToValidate="txtEffDate" ErrorMessage="Invalid Date" Type="Date" MinimumValue="01/01/1900" MaximumValue="01/01/2100" Display="Dynamic" ForeColor="White"></asp:RangeValidator>
    <asp:CalendarExtender ID="CalendarExtender1" runat="server" TargetControlID="txtEffDate" Format="MM/dd/yyyy"></asp:CalendarExtender>
</td>

与链接问题一样,我的问题是,当用户在文本框内单击时,它们有时会从中间开始,我需要将光标一直强制到左侧.有没有办法从ASP内部将光标一直强制到左侧,或者这是否只能在代码隐藏中完成？

Answer 1

你可以使用javascript和jQuery通过0,0在Mouseup事件上设置SelectionRange来实现:

$(document).ready(function(){
   $(".resetCursor").mouseup(function () {
      this.setSelectionRange(0,0);    
   });
});

http://jsfiddle.net/6m8stbo7/1/

然后将该类添加resetCursor到TextBox要使用此行为扩展的控件.

<asp:TextBox ID="txtePro" runat="server" 
   CssClass="textbox resetCursor" 
   Font-Size="Small" 
   Height="18px" 
   Width="100px" 
   Visible="False" 
   Wrap="False" 
   OnTextChanged="txtEPro_OnLeave" 
   AutoPostBack="true">
</asp:TextBox>

说明:

resetCursor是css stylesheet class用来jQuery选择特定DOM元素的.通常的做法是使用css类在一组DOM-Elements上"声明"某些行为,然后使用jquery一次性"激活"该行为.编辑:请注意,这resetCursor是一个任意名称,您可以根据需要选择其他名称.

这是对基本jQuery选择器的一个很好的介绍(我在这个例子中使用了Class-Selector):

http://api.jquery.com/category/selectors/basic-css-selectors/