我需要在我的 gridview 中计算选中的复选框,但我不知道该怎么做。也许我可以使用 JavaScript 并将计数保存在样式为 display none 的文本框中。我该怎么做?
最佳答案
我写了执行此操作的客户端和服务器端方法,看看它们并选择最适合您的方法!
请注意我使用了 jQuery对于客户端逻辑,因为它是在客户端操作 DOM 的更现代的方式
来源:
%>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
<script src="http://code.jquery.com/jquery-1.8.2.js" type="text/javascript"></script>
<script type="text/javascript">
function GetMarriedEmployees() {
var counter = 0;
$("#<%=gvEmployees.ClientID%> input[id*='chkIsMarried']:checkbox").each(function (index) {
if ($(this).is(':checked'))
counter++;
});
alert(counter);
}
</script>
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<asp:GridView ID="gvEmployees" AutoGenerateColumns="false" runat="server">
<Columns>
<asp:BoundField DataField="EmployeeId" />
<asp:BoundField DataField="EmployeeName" />
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="chkIsMarried" runat="server" Checked='<%# Bind("IsMarried") %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:Button ID="btnGetMarried" runat="server" Text="Server" OnClick="btnGetMarried_Click" /><br />
<input type="button" value="Client" onclick="GetMarriedEmployees()" />
</asp:Content>
代码隐藏:
namespace WebApplication1
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
List<Employees> employees = new List<Employees>()
{
new Employees{EmployeeId=1, EmployeeName="Bob", IsMarried=true},
new Employees{EmployeeId=2, EmployeeName="John", IsMarried=true}
};
gvEmployees.DataSource = employees;
gvEmployees.DataBind();
}
}
protected void btnGetMarried_Click(object sender, EventArgs e)
{
int marriedEmployees = 0;
foreach (GridViewRow row in gvEmployees.Rows)
{
var isMarried = (CheckBox)row.FindControl("chkIsMarried");
if(isMarried.Checked)
marriedEmployees++;
}
Response.Write(String.Format("Number of married employees = {0}",marriedEmployees.ToString()));
}
public class Employees
{
public int EmployeeId { get; set; }
public string EmployeeName { get; set; }
public bool IsMarried { get; set; }
}
}
编辑:
我怀疑您可能是 VB.NET 开发人员,所以这里是服务器端代码的 VB 版本:
Public Class _Default
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Page.IsPostBack Then
Dim employees As New List(Of Employees)
Dim employee1 As Employees = New Employees()
employee1.EmployeeId = 1
employee1.EmployeeName = "Bob"
employee1.IsMarried = False
Dim employee2 As Employees = New Employees()
employee2.EmployeeId = 2
employee2.EmployeeName = "John"
employee2.IsMarried = True
employees.Add(employee1)
employees.Add(employee2)
gvEmployees.DataSource = employees
gvEmployees.DataBind()
End If
End Sub
Protected Sub btnGetMarried_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnGetMarried.Click
Dim marriedEmployees As Integer = 0
For Each row As GridViewRow In gvEmployees.Rows
Dim isMarried As CheckBox = row.FindControl("chkIsMarried")
If isMarried.Checked Then
marriedEmployees += 1
End If
Next
Response.Write(String.Format("Number of married employees = {0}", marriedEmployees))
End Sub
End Class
Public Class Employees
Public Property EmployeeId As Integer
Public Property EmployeeName As String
Public Property IsMarried As Boolean
End Class
关于javascript - 计算 gridview 中选中的复选框,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13254388/