GridView中添加一个CheckBox列

最新推荐文章于 2023-12-28 11:30:42 发布

转载最新推荐文章于 2023-12-28 11:30:42 发布 · 182 阅读

文章标签：

#xhtml #ui #javascript #ViewUI

本文介绍了一个ASP.NET应用程序中如何使用GridView控件的Checkbox列实现全选功能及记录所选项目的具体方法。通过JavaScript实现了全选功能，并利用C#后台代码收集并处理选中的项目。

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@ Page Language="C#" AutoEventWireup="true" CodeFile="GridView_CheckBoxColumn.aspx.cs" Inherits="GridSamples_GridView_CheckBoxColumn" %>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" >
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<head runat="server">
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<title>无标题页</title>
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function selectAll(obj)
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{
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var theTable = obj.parentElement.parentElement.parentElement;
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var i;
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var j = obj.parentElement.cellIndex;
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for(i=0;i<theTable.rows.length;i++)
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{
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var objCheckBox = theTable.rows[i].cells[j].firstChild;
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if(objCheckBox.checked!=null)objCheckBox.checked = obj.checked;
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}
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}
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</script>
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</head>
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<body>
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<form id="form1" runat="server">
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<div>
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<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AutoGenerateColumns="False"
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DataKeyNames="id" DataSourceID="AccessDataSource1" AllowSorting="True" OnDataBinding="GridView1_DataBinding" OnRowDataBound="GridView1_RowDataBound">
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<Columns>
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<asp:TemplateField>
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<ItemTemplate>
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<asp:CheckBox ID="CheckBox1" runat="server" Checked="True" Text='<%#DataBinder.Eval(Container.DataItem,"id") %>' />
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</ItemTemplate>
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<HeaderTemplate>
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 <input id="CheckAll" type="checkbox" onclick="selectAll(this);" />本页全选
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</HeaderTemplate>
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</asp:TemplateField>
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<asp:BoundField DataField="id" HeaderText="id" InsertVisible="False" ReadOnly="True"
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SortExpression="id" />
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<asp:BoundField DataField="name" HeaderText="name" SortExpression="name" />
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<asp:BoundField DataField="sex" HeaderText="sex" SortExpression="sex" />
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<asp:BoundField DataField="deptid" HeaderText="deptid" SortExpression="deptid" />
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</Columns>
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</asp:GridView>
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<asp:AccessDataSource ID="AccessDataSource1" runat="server" DataFile="~/App_Data/test.mdb"
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SelectCommand="SELECT [id], [name], [sex], [deptid] FROM [employees]"></asp:AccessDataSource>
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<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="ShowAllSelectedItem" />
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<asp:TextBox ID="TextBox1" runat="server" Width="200px"></asp:TextBox></div>
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</form>
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</body>
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</html>
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using System;
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using System.Data;
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using System.Configuration;
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using System.Collections;
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using System.Web;
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using System.Web.Security;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.Web.UI.WebControls.WebParts;
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using System.Web.UI.HtmlControls;
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public partial class GridSamples_GridView_CheckBoxColumn : System.Web.UI.Page
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{
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/**//// <summary>
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/// 获取或设置选中项的集合
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/// </summary>
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protected ArrayList SelectedItems
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{
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get
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{
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return (ViewState["mySelectedItems"] != null) ? (ArrayList)ViewState["mySelectedItems"] : null;
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}
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set
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{
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ViewState["mySelectedItems"] = value;
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}
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}
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protected void Page_Load(object sender, EventArgs e)
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{
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}
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protected void GridView1_DataBinding(object sender, EventArgs e)
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{
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//在每一次重新绑定之前，需要调用CollectSelected方法从当前页收集选中项的情况
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CollectSelected();
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}
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protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
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{
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//这里的处理是为了回显之前选中的情况
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if (e.Row.RowIndex > -1 && this.SelectedItems!=null)
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{
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DataRowView row = e.Row.DataItem as DataRowView;
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CheckBox cb = e.Row.FindControl("CheckBox1") as CheckBox;
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if(this.SelectedItems.Contains(row["id"].ToString()))
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cb.Checked = true;
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else
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cb.Checked = false;
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}
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}
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/**//// <summary>
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/// 从当前页收集选中项的情况
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/// </summary>
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protected void CollectSelected()
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{
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ArrayList selectedItems = null;
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if (this.SelectedItems == null)
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selectedItems = new ArrayList();
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else
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selectedItems = this.SelectedItems;
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for (int i = 0; i < this.GridView1.Rows.Count; i++)
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{
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string id = this.GridView1.Rows[i].Cells[1].Text;
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CheckBox cb = this.GridView1.Rows[i].FindControl("CheckBox1") as CheckBox;
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if (selectedItems.Contains(id) && !cb.Checked)
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selectedItems.Remove(id);
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if (!selectedItems.Contains(id) && cb.Checked)
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selectedItems.Add(id);
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}
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this.SelectedItems = selectedItems;
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}
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protected void Button1_Click(object sender, EventArgs e)
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{
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//最后，需要对选中项进行操作之前，不能忘了还要最后一次收集当前页的选中情况
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CollectSelected();
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this.TextBox1.Text = string.Empty;
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foreach (object tmp in this.SelectedItems)
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this.TextBox1.Text += tmp.ToString() + ",";
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}
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}
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