我有一个GridView显示人员记录.我想有条件地显示CommandField或ButtonField基于底层记录的某些属性.我们的想法是只允许对特定人员执行命令.
做这个的最好方式是什么？我更喜欢程序性的声明性解决方案.
小智 59
首先,将您的ButtonField或转换CommandField为a TemplateField,然后将Visible按钮的属性绑定到实现业务逻辑的方法:
<asp:GridView runat="server" ID="GV1" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="Name" HeaderText="Name" />
<asp:BoundField DataField="Age" HeaderText="Age" />
<asp:TemplateField>
<ItemTemplate>
<asp:Button runat="server" Text="Reject"
Visible='<%# IsOverAgeLimit((Decimal)Eval("Age")) %>'
CommandName="Select"/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
然后,在后面的代码中,添加方法:
protected Boolean IsOverAgeLimit(Decimal Age) {
return Age > 35M;
}
这里的优点是你可以IsOverAgeLimit很容易地测试方法.
Rus*_*Cam 13
它可以在RowDataBound事件发生时完成
protected void GridView_RowDataBound(Object sender, GridViewRowEventArgs e)
{
if(e.Row.RowType == DataControlRowType.DataRow)
{
// Hide the edit button when some condition is true
// for example, the row contains a certain property
if (someCondition)
{
Button btnEdit = (Button)e.Row.FindControl("btnEdit");
btnEdit.Visible = false;
}
}
}
这是一个演示页面
标记
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="DropDownDemo._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>GridView OnRowDataBound Example</title>
</head>
<body>
<form id="form1" runat="server">
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:BoundField HeaderText="Name" DataField="name" />
<asp:BoundField HeaderText="Age" DataField="age" />
<asp:TemplateField>
<ItemTemplate>
<asp:Button ID="BtnEdit" runat="server" Text="Edit" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</form>
</body>
</html>
代码背后
using System;
using System.Collections.Generic;
using System.Web.UI.WebControls;
namespace GridViewDemo
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
GridView1.DataSource = GetCustomers();
GridView1.DataBind();
}
protected override void OnInit(EventArgs e)
{
GridView1.RowDataBound += new GridViewRowEventHandler(GridView1_RowDataBound);
base.OnInit(e);
}
void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType != DataControlRowType.DataRow) return;
int age;
if (int.TryParse(e.Row.Cells[1].Text, out age))
if (age == 30)
{
Button btnEdit = (Button) e.Row.FindControl("btnEdit");
btnEdit.Visible = false;
}
}
private static List<Customer> GetCustomers()
{
List<Customer> results = new List<Customer>();
results.Add(new Customer("Steve", 30));
results.Add(new Customer("Brian", 40));
results.Add(new Customer("Dave", 50));
results.Add(new Customer("Bill", 25));
results.Add(new Customer("Rich", 22));
results.Add(new Customer("Bert", 30));
return results;
}
}
public class Customer
{
public string Name {get;set;}
public int Age { get; set; }
public Customer(string name, int age)
{
Name = name;
Age = age;
}
}
}
在演示中,在客户年龄为30岁的行中,"编辑"按钮不可见(HTML标记不会发送到客户端).
leo*_*ios 11
请允许我分享我的方法以获得它的价值.对于我来说,将命令字段转换为模板字段控件不是一个选项,因为命令字段带有内置功能,否则我必须自己创建,例如,当单击编辑时它更改为"更新取消"的事实,以及单击"编辑"时,行中作为标签的所有单元格都将成为文本框等.
在我的方法中,您可以按原样保留命令字段,然后您可以根据需要通过代码隐藏它.在这个例子中,如果网格字段"Scenario"显示RowDataBound事件的相关行的文本"Actual",我将隐藏它.
protected void gridDetail_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
if (((Label)e.Row.FindControl("lblScenario")).Text == "Actual")
{
LinkButton cmdField= (LinkButton)e.Row.Cells[0].Controls[0];
cmdField.Visible = false;
}
}}
如果要从表中完全删除列(即不仅仅是按钮),请使用合适的事件处理程序(例如,对于OnDataBound事件),然后在目标上隐藏相应的列GridView.选择一个只会为此控件触发一次的事件,即不会OnRowDataBound.
<asp:GridView ID="grdUsers" runat="server" DataSourceID="dsProjectUsers" OnDataBound="grdUsers_DataBound">
<Columns>
<asp:TemplateField HeaderText="Admin Actions">
<ItemTemplate><asp:Button ID="btnEdit" runat="server" text="Edit" /></ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="FirstName" HeaderText="First Name" />
<asp:BoundField DataField="LastName" HeaderText="Last Name" />
<asp:BoundField DataField="Telephone" HeaderText="Telephone" />
</Columns>
</asp:GridView>
protected void grdUsers_DataBound(object sender, EventArgs e)
{
try
{
// in this case hiding the first col if not admin
if (!User.IsInRole(Constants.Role_Name_Admin))
grdUsers.Columns[0].Visible = false;
}
catch (Exception ex)
{
// deal with ex
}
}