asp.net2.0里的DataGridView的列动态排序,,CIO之家

asp.net2.0里的DataGridView的列动态排序

佚名　　本站原创　　综合　　编辑:dezai　　图片来源:网络

//这个方法就是用来调整列顺序的具体方法，里面还包含了一个操作列，是TemplateField&nb

//这个方法就是用来调整列顺序的具体方法，里面还包含了一个操作列，是TemplateField
        private void AdjustGridViewColumns()
        {
            //if (Page.IsPostBack) return;
            PersonSettingController psc = new PersonSettingController();
            CountrySettingController csc = new CountrySettingController();

            List psis = psc.GetByClubId(Common.CurrentClubId);
            PersonSettingInfo psi = new PersonSettingInfo();
            if (psis.Count != 0)
                psi = psis[0];

            CountrySettingInfo csi = new CountrySettingInfo();
            if (psi.DefaultCountry.HasValue)
            {
                List settings = csc.GetByCountryId(Common.CurrentClubId, psi.DefaultCountry.Value);
                if (settings.Count > 0)
                    csi = settings[0];
            }

            //country column visible or not
            this.GridView1.Columns[10].Visible = psi.UseMoreCountries;

            //if (csi == null) return;
            //if (csi.HouseNumberAfterStreet) return; //this is default;

            DataControlFieldCollection cols = this.GridView1.Columns.CloneFields();
            this.GridView1.Columns.Clear();

            TemplateField tf = cols[1] as TemplateField;
            //CommandTemplate 是自己写的一个小类，里面会有两个图形按钮。
            CommandTemplate ct = new CommandTemplate("command");
            ct.CommandArgumentField = "PersonId";
            tf.ItemTemplate = ct;

            //下面开始为动态排序
            for (int i = 0; i < 7; i++)
                this.GridView1.Columns.Add(cols[i]);

            if (!csi.HouseNumberAfterStreet)
            {
                //houseNr.
                this.GridView1.Columns.Add(cols[8]);
                //street
                this.GridView1.Columns.Add(cols[7]);
            }
            else
            {
                //houseNr.
                this.GridView1.Columns.Add(cols[7]);
                //street
                this.GridView1.Columns.Add(cols[8]);
            }

            if (csi.ZipCodeAfterCity)
            {
                //city
                this.GridView1.Columns.Add(cols[10]);
                //zipcode
                this.GridView1.Columns.Add(cols[9]);
            }
            else
            {
                //city
                this.GridView1.Columns.Add(cols[9]);
                //zipcode
                this.GridView1.Columns.Add(cols[10]);
            }

            this.GridView1.Columns.Add(cols[11]);

            cols.Clear();

            //设置一个变量说明已经排序过
            this.ColumnsAdjusted = true;
        }

        //使用ViewState来储存是否已经排过序
        private bool ColumnsAdjusted
        {
            get
            {
                object b = ViewState["ColumnsAdjusted"];
                return (b == null) ? false : true;
            }
            set
            {
                ViewState["ColumnsAdjusted"] = value;
            }
        }

        //这里是重要的，在LoadViewState的时候如果检测到已经排过序，则再重新排序一下。
        protected override void LoadViewState(object savedState)
        {
            base.LoadViewState(savedState);
            if (ColumnsAdjusted)
            {
                this.AdjustGridViewColumns();
            }
        }

        //如果不是Postback则在第一次加载的时候排序
        protected void Page_Load(System.Object sender, System.EventArgs e)
        {
            if (!ColumnsAdjusted)
            {
                this.AdjustGridViewColumns();
            }
         }

        //按道理这里应该不使用的，可是事实上只有这样才能够使用模板列继续存在，而且能引发事件
        protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                if (Page.IsPostBack)
                {
                    CommandTemplate ct = new CommandTemplate("");
                    ct.InstantiateIn(e.Row.Cells[1]);
                }
            }
        }

//CommandTemplate类，继承于ITemplate
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

namespace XCESS.XM
{
    public class CommandTemplate : ITemplate
    {
        private string colname;

        public CommandTemplate(string colname)
        {
            this.colname = colname;
        }

        private string commandargumentfield;

        public string CommandArgumentField
        {
            get { return commandargumentfield; }
            set { commandargumentfield = value; }
        }

        private string commandargument;

        public string CommandArgument
        {
            get { return commandargument; }
            set { commandargument = value; }
        }

        private bool includeView = true;

        public bool IncludeView
        {
            get { return includeView; }
            set { includeView = value; }
        }
        private bool includeEdit = true;

        public bool IncludeEdit
        {
            get { return includeEdit; }
            set { includeEdit = value; }
        }

        public void InstantiateIn(Control container)
        {
            ImageButton btn1 = BuildButton(CommandButtonType.View);
            ImageButton btn2 = BuildButton(CommandButtonType.Edit);

            btn1.DataBinding+=new EventHandler(btn_DataBinding);
            btn2.DataBinding += new EventHandler(btn_DataBinding);

            btn1.ID = "imgView";
            btn2.ID = "btnEdit";

            container.Controls.Add(btn1);
            container.Controls.Add(btn2);
        }

        public void btn_DataBinding(object sender, EventArgs e)
        {
            ImageButton btn = sender as ImageButton;
            GridViewRow container = (GridViewRow)btn.NamingContainer;

            if (!string.IsNullOrEmpty(commandargumentfield))
            {
                btn.CommandArgument = (DataBinder.Eval(container.DataItem, commandargumentfield) ?? "").ToString();
            }
        }

        private ImageButton BuildButton(CommandButtonType commandButtonType)
        {
            ImageButton btn = new ImageButton();
            if (commandButtonType == CommandButtonType.View)
            {
                btn.CommandName = "Select";
                btn.ImageUrl = "~/images/view.gif";
            }
            else
            {
                btn.CommandName = "EditDetail";
                btn.ImageUrl = "~/images/edit.gif";
            }
            btn.CausesValidation = false;

            if (!string.IsNullOrEmpty(commandargument))
                btn.CommandArgument = commandargument;

            return btn;
        }
    }

    public enum CommandButtonType
    {
        Edit,
        View,
    }
}
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