Question

这是我的aspx页面：

import java.util.Scanner;

class Main {
  public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    Station Reading = CreateStation("Reading", "Great Western", true);
    Station Bristol = CreateStation("Bristol", "Great Western", false);
    Station York = CreateStation("York", "Great Eastern", true);
    System.out.println("What Station do you need to know about? ");
    String UsrStation = s.nextLine();
    System.out.println(staGetName(York)+" "+staGetOp(York)+" "+staGetStep(York));
  }

  public static Station CreateStation(String StationName, String Operator, Boolean StepFree){
    Station s = new Station();
    staSetName(s, StationName);
    staSetOp(s, Operator);
    staSetStep(s, StepFree);
    return s;
  }

  //Getter Methods for Station
  public static String staGetName(Station s){
    return s.name;
  }

  public static String staGetOp(Station s){
    return s.operator;
  }

  public static Boolean staGetStep(Station s){
    return s.stepFree;
  }

  //Setter Methods for Station
  public static Station staSetName(Station s, String name){
    s.name = name;
    return s;
  }

  public static Station staSetOp(Station s, String operator){
    s.operator = operator;
    return s;
  }

  public static Station staSetStep(Station s, Boolean stepFree){
    s.stepFree = stepFree;
    return s;
  }
}

class Station{
  String name;
  String operator;
  Boolean stepFree;
}

这是我的vb类：

<asp:ListView ID="ListViewHRDFormIzin" runat="server" DataSourceID="SqlDataStaffHRDFormIzin" DataKeyNames="STAFF_NIK" EnableViewState="false">
    <LayoutTemplate>
        <table id="dataTable" class="table table-bordered striped data" align="left">
            <thead style="background-color: #4877CF">
                <!-- add checkbox -->
                <th style="text-align: center; color: white">Check</th>
                <th style="text-align: center; color: white">NIK</th>
            </thead>
            <asp:PlaceHolder ID="itemPlaceHolder" runat="server" />
        </table>
    </LayoutTemplate>
    <ItemTemplate>
        <tr>
            <td>
                <asp:CheckBox ID="CheckBox1" runat="server" />
            </td>
            <td style="text-align: center">
                <asp:Label ID="lbl" runat="server" Text='<%# Eval("STAFF_NIK")%>'></asp:Label></td>
            <td style="text-align: center">
                <asp:LinkButton ID="lnkSelect" Text='DETAIL' CommandName="Select" runat="server"><img src="img/detail.png" width="50px" height="50px" /></asp:LinkButton></td>
        </tr>
    </ItemTemplate>
    <EmptyDataTemplate>Data Izin Karyawan Tidak diketemukan</EmptyDataTemplate>
    <EmptyItemTemplate>Data Izin Karyawan Tidak diketemukan</EmptyItemTemplate>
</asp:ListView>

<asp:Button ID="Button1" Visible="true" runat="server"
    Text="Get Data" class="btn btn-success" />

我也已将此代码添加到页面加载中：

Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

    'get data from chekced checkbox
    Dim ChkValue As New List(Of String)()
    For Each item As ListViewItem In ListViewHRDFormIzin.Items
        Dim ck As CheckBox = DirectCast(item.FindControl("CheckBox1"), CheckBox)
        If ck.Checked Then
            ChkValue.Add(DirectCast(item.FindControl("lbl"), Label).Text)
        End If
    Next
    For Each itms As String In ChkValue
        Response.Write("<script>alert('Value Selected: " + itms + "')</script>")
    Next

    Response.Write("<script>window.location.href='HRDFORMIZIN.aspx';</script>")

End Sub

我还想念什么？当我按下button1时，它什么也不做。我的意思是，没有价值得到。只需转到：

If IsPostBack = False Then
    ListViewHRDFormIzin.DataBind()
End If

我正在尝试通过从ID ='lbl'的标签中检索值来检查每行的值。但是button1总是一无所有

Answer 1

由于设置了EnableViewState="false"，列表视图在回发时丢失了数据。尝试将其设置为true。

我没有从Listview的Checkbox Value中获取任何东西

1 个答案: