using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Web;

/// <summary>
/// Summary description for ScrollerTable
/// </summary>
public class ScrollerTable
{
    public ScrollerTable()
    {
    }

    /// <summary>
    /// 构造固定表头和固定列的table
    /// </summary>
    /// <param name="obj">数据表</param>
    /// <param name="staticColCount">固定列数（需要固定的列要放在左边）</param>
    /// <param name="widthPerCol">每列宽度</param>
    /// <returns></returns>
    public string GetScrollerTable(DataTable obj, int staticColCount, List<string> widthPerCol, int tableWidth, int tableHeight)
    {
        //活动表宽
        string scrollerTableWidth = GetScrollerTbaleWidth(staticColCount, widthPerCol);
        //活动div占屏幕宽度
        string scrollerDivWidth = GetScrollerDivWidth(staticColCount, widthPerCol, tableWidth);

        StringBuilder table = new StringBuilder();
        table.Append("<div id='ScrollerTable'>");

        #region 构造表头

        table.Append("<div id='thead' style='display: flex;'>");

        #region 构造固定列

        if (staticColCount > 0)
        {
            table.Append("<div id='headLeft' style='display: inline-flex;'> <table cellpadding='0' cellspacing='0'> <tr>");
            for (int i = 0; i < staticColCount; i++)
            {
                table.Append("<td style='width:" + widthPerCol[i] + "px;'>" + obj.Columns[i].ColumnName + "</td>");
            }
            table.Append("</tr></table></div>");
        }

        #endregion

        #region 构造活动列

        table.Append(" <div id='headRight' style='overflow: hidden; display: inline-flex;width:" + scrollerDivWidth + "px;'>");
        table.Append(" <table cellpadding='0' cellspacing='0' style='width: " + scrollerTableWidth + "px; '><tr>");
        for (int i = staticColCount; i < obj.Columns.Count; i++)
        {
            table.Append("<td style='width:" + widthPerCol[i] + "px;'>" + obj.Columns[i].ColumnName + "</td>");
        }
        table.Append(" </tr></table ></div> ");

        #endregion

        table.Append("</div>");

        #endregion

        #region 构造表主体

        table.Append("<div id='tbody'>");

        #region 构造固定列内容
        if (staticColCount > 0)
        {
            table.Append("<div id='bodyLeft' style='display: inline-flex;overflow: hidden;height:" + tableHeight + "px;'> <table cellpadding='0' cellspacing='0'>");
            foreach (DataRow row in obj.Rows)
            {
                table.Append("<tr>");
                for (int i = 0; i < staticColCount; i++)
                {
                    table.Append("<td style='width:" + widthPerCol[i] + "px;'>" + row[i] + "</td>");
                }
                table.Append("</tr>");
            }
            table.Append("</table></div>");
        }
        #endregion

        #region 构造活动列内容

        table.Append("<div id='bodyRight' style='display: inline-flex;overflow: auto;height:" + tableHeight + "px;width:"+ scrollerDivWidth + "px; '>");
        table.Append(" <table cellpadding='0' cellspacing='0' style='width: " + scrollerTableWidth + "px; '>");
        foreach (DataRow row in obj.Rows)
        {
            table.Append("<tr>");
            for (int i = staticColCount; i < obj.Columns.Count; i++)
            {
                table.Append("<td style='width:"+ widthPerCol[i] + "px;'>"+ row[i] + "</td>");
            }
            table.Append("</tr>");
        }
        table.Append("</table></div>");

        #endregion

        table.Append("</div>");

        #endregion

        table.Append("</div>");
        return table.ToString();
    }

    /// <summary>
    /// 获取活动表宽
    /// </summary>
    /// <param name="staticColCount"></param>
    /// <param name="widthPerCol"></param>
    /// <returns></returns>
    private string GetScrollerTbaleWidth(int staticColCount, List<string> widthPerCol)
    {
        int width = 0;
        for (int i = staticColCount; i < widthPerCol.Count; i++)
        {
            width += Convert.ToInt32(widthPerCol[i]);
        }
        return width.ToString();
    }

    private string GetScrollerDivWidth(int staticColCount, List<string> widthPerCol, int tableWidth)
    {
        int width = 0;
        for (int i = 0; i < staticColCount; i++)
        {
            width += Convert.ToInt32(widthPerCol[i]);
        }
        return (tableWidth - width).ToString();
    }
}