Visual Studio Web表單無法驗證

這是我的Web表單。第一個名字是必需的，但是當我運行這個程序時，我將FirstName字段留空，我仍然得到感謝我填寫調查的頁面。它應該告訴我，名字是必需的。Visual Studio Web表單無法驗證

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Cheese.aspx.cs" Inherits="WebApplication1.Cheese" %> 

<!DOCTYPE html> 

<html xmlns="http://www.w3.org/1999/xhtml"> 
<head runat="server"> 
    <title></title> 
</head> 
<body> 

    <form id="form2" runat="server"> 
    <div style="width: 37px"> 
     <asp:Panel ID="PanelNameForm" runat="server" Width="502px"> 
      <asp:Label ID="LabelFirstName" runat="server" Text="First Name"></asp:Label> 
      <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="RequiredFieldValidator" ControlToValidate="TextBoxFirstName"></asp:RequiredFieldValidator> 
      <asp:TextBox ID="TextBoxFirstName" runat="server"></asp:TextBox> 
      <asp:Label ID="LabelLastName" runat="server" Text="Last Name"></asp:Label> 
      <asp:TextBox ID="TextBoxLastName" runat="server"></asp:TextBox> <br /> 
      <asp:Label ID="LabelAddr1" runat="server" Text="Address"></asp:Label> 
      <asp:TextBox ID="TextBoxAddr1" runat="server"></asp:TextBox> 
      <asp:Label ID="LabelAddr2" runat="server" Text="Address"></asp:Label> 
      <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> 
      <br /> 
      City<asp:TextBox ID="TextBoxAddr2" runat="server"></asp:TextBox> 
      State<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox> 
      Zip<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox> 
      <br /> 
      Phone Number<asp:TextBox ID="TextBox4" runat="server"></asp:TextBox> 
      email<asp:TextBox ID="TextBox5" runat="server"></asp:TextBox> 
      Age<asp:DropDownList ID="DropDownList2" runat="server"> 
       <asp:ListItem Value="1">0-17</asp:ListItem> 
       <asp:ListItem Value="2">18-21</asp:ListItem> 
       <asp:ListItem Value="3">22-25</asp:ListItem> 
       <asp:ListItem Value="4">26-35</asp:ListItem> 
       <asp:ListItem Value="5">36+</asp:ListItem> 
      </asp:DropDownList> 
      <asp:Panel ID="Panel1" runat="server" Width="407px"> 
       Gender<asp:RadioButtonList ID="RadioButtonList1" runat="server"> 
        <asp:ListItem Value="Male">Male</asp:ListItem> 
        <asp:ListItem Value="Female">Female</asp:ListItem> 
       </asp:RadioButtonList> 
       Favorite Cheese<asp:TextBox ID="TextBox6" runat="server"></asp:TextBox> 
       <br /> 
       How often do you eat cheese? (Check one)<asp:CheckBoxList ID="CheckBoxList1" runat="server"> 
        <asp:ListItem>Every Day</asp:ListItem> 
        <asp:ListItem>Every Other Day</asp:ListItem> 
        <asp:ListItem>Once A Week</asp:ListItem> 
        <asp:ListItem>I Don&#39;t Like Cheese</asp:ListItem> 
       </asp:CheckBoxList> 
       Cheese Texture Preferences (Check All That Apply)<asp:CheckBoxList ID="CheckBoxList2" runat="server"> 
        <asp:ListItem Value="1">Hard</asp:ListItem> 
        <asp:ListItem Value="2">Semi-hard</asp:ListItem> 
        <asp:ListItem Value="3">Semi-soft</asp:ListItem> 
        <asp:ListItem Value="4">Soft</asp:ListItem> 
        <asp:ListItem Value="5">Crumbly</asp:ListItem> 
       </asp:CheckBoxList> 
       Milk Type Preferences (Check All That Apply)<asp:CheckBoxList ID="CheckBoxList3" runat="server"> 
        <asp:ListItem>Buffalo</asp:ListItem> 
        <asp:ListItem>Cow</asp:ListItem> 
        <asp:ListItem>Goat</asp:ListItem> 
        <asp:ListItem>Vegetarian</asp:ListItem> 
       </asp:CheckBoxList> 
        <asp:Button ID="Button" runat="server" Text="Submit" OnClick="Button_Click" /> 
       </asp:Panel> 
     </asp:Panel> 
     <asp:Panel ID="PanelThankYou" runat="server" Width="442px"> 
      Thank you for taking the survey, <asp:Label ID="LabelThankYouName" runat="server" Text=""></asp:Label> 
     </asp:Panel> 
    </div> 
    </form> 
</body> 
</html>

下面是提交按鈕的代碼：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.UI; 
using System.Web.UI.WebControls; 

namespace WebApplication1 
{ 
    public partial class Cheese : System.Web.UI.Page 
    { 
     protected void Page_Load(object sender, EventArgs e) 
     { 
      if (!(Page.IsPostBack)) 
      { 
       //first time page is loaded 
       PanelThankYou.Visible = false; 
      } 
      else 
      { 

      } 
     } 

     protected void Button_Click(object sender, EventArgs e) 
     { 
      PanelNameForm.Visible = false; 
      PanelThankYou.Visible = true; 

      LabelThankYouName.Text = TextBoxFirstName.Text + " " + TextBoxLastName.Text + "!"; 
     } 
    } 
}

來源

2013-09-24 Grafica

如果你想客戶端validatation（JavaScript）的設置EnableClientScript爲true：

<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="RequiredFieldValidator" ControlToValidate="TextBoxFirstName" EnableClientScript="true"></asp:RequiredFieldValidator>

如果您想驗證在服務器上，在代碼隱藏中使用Page.IsValid特權：

if(Page.IsValid) 
{ 
... 
}

您也可以使用的ValidationSummary（< ASP：的ValidationSummary>標籤）來驗證控件

組

來源

2013-09-24 02:43:15 maseal

謝謝！那麼我應該將我的代碼更改爲這樣嗎？ protected void Button_Click（object sender，EventArgs e） if（Page.IsValid） { PanelNameForm.Visible = false; PanelThankYou.Visible = true; LabelThankYouName.Text = TextBoxFirstName.Text +「」+ TextBoxLastName.Text +「！」; } } – Grafica

我加了EnableClientScript =「true」，然後運行它。它仍然讓我留下FirstName空白。 – Grafica

只需添加ValidationGroup屬性來的RequiredFieldValidator，並在其上回發數據的按鈕。它將防止文本框上的空白值。

<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="RequiredFieldValidator" ControlToValidate="TextBoxFirstName" ValidationGroup="v"></asp:RequiredFieldValidator> 

..... // other code 

<asp:Button ID="Button" runat="server" Text="Submit" OnClick="Button_Click" ValidationGroup="v" />

願這對你的工作：d

來源

2013-09-24 05:54:44

不，那沒用。不管怎麼說，還是要謝謝你。 – Grafica

我檢查了你的代碼。 PLZ在你的代碼中替換<！DOCTYPE html PUBLIC「 - // W3C // DTD XHTML 1.0 Transitional // EN」「http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd」 >' –

我們現在使用HTML5，而不是回到XHTML。 – Grafica

下面是我如何做HTML5（你說你使用）必填字段驗證一個快速演示。

演示代碼隱藏頁（.aspx.cs）：

using System; 
using System.Web.UI.WebControls; 

public partial class PgValidationDemo : System.Web.UI.Page 
{ 
    // bind page init 
    // in the page constructor 
    public PgValidationDemo() 
    { 
     this.Init += PgValidationDemo_Init; 
    } 

    // Bind our submit button click event 
    private void PgValidationDemo_Init(object sender, EventArgs e) 
    { 
     cmdSubmit.Click += cmdSubmit_Click; 
    } 

    // handle the submit button 
    // click event 
    private void cmdSubmit_Click(object sender, EventArgs e) 
    { 
     // Tell the form to validate 
     // fields in validation group 
     // 'ValidationDemo' 
     String vGroup = "ValidationDemo"; 
     vSummary.ValidationGroup = vGroup; 
     Page.Validate(vGroup); 

     // Call our fantastic convenience method 
     // to check if a textbox has a value in it 
     this.addRequiredFieldValidator(txtFirstName, vGroup, "FirstName is Required."); 

     // If Page.IsValid 
     // redirect to the 'thanks page' 
     // if it isnt valid we don't need to 
     // provide additional code because 
     // the error messages will show in the 
     // validation summary 
     if (Page.IsValid) 
     { 
      //Redirect to Thanks for filling out survey 
     } 
    } 

    // convenience method to add required 
    // text validators to the form collection 
    private void addRequiredFieldValidator(TextBox txt, String validationGroup, String errorMessage) 
    { 
     Page.Validators.Add(new CustomValidator() 
     { 
      IsValid = !String.IsNullOrWhiteSpace(txt.Text), 
      ErrorMessage = errorMessage, 
      ValidationGroup = validationGroup 
     }); 
    } 
}

演示頁（的.aspx）

<%@ Page Language="C#" AutoEventWireup="false" CodeFile="default.aspx.cs" Inherits="PgValidationDemo" %> 
<!DOCTYPE html> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head runat="server"> 
    <title>Validation Demo</title> 
</head> 
<body> 
    <form id="aspnetForm" runat="server"> 
    <asp:ValidationSummary runat="server" ID="vSummary" /> 

    <label> 
     FirstName: 
     <asp:TextBox runat="server" ID="txtFirstName" required="required" /> 
     <!-- 
      required="required" is an html5 form attribute that prevents 
      folks from submitting forms with blank values in textboxes. 
      great stuff! 
     --> 
    </label> 
    <div> 
     <asp:Button runat="server" id="cmdSubmit" Text="Submit" /> 
    </div> 
    </form> 
</body> 
</html>

來源

2013-09-24 22:30:27

我有這個在我的Button_Click方法，但它仍然需要我感謝頁面，即使我離開這個名字的空白：保護無效Button_Click（對象發件人，EventArgs的） { 如果（Page.IsValid） { PanelNameForm.Visible = false; PanelThankYou.Visible = true; LabelThankYouName.Text = TextBoxFirstName.Text +「」+ TextBoxLastName.Text +「！」; } } – Grafica

Visual Studio Web表單無法驗證

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