335 lines
11 KiB
C#
335 lines
11 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Web;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.Data;
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using System.Text;
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using System.IO;
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using AspNet = System.Web.UI.WebControls;
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namespace FineUI.Examples.data
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{
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public partial class grid_excel_groupfield : PageBase
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{
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protected void Page_Load(object sender, EventArgs e)
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{
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if (!IsPostBack)
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{
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BindGrid();
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}
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}
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#region BindGrid
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private void BindGrid()
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{
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ViewState["UseDataSource1"] = true;
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DataTable table = DataSourceUtil.GetDataTable();
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Grid1.DataSource = table;
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Grid1.DataBind();
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}
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#endregion
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#region Events
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protected void Button2_Click(object sender, EventArgs e)
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{
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DataTable table;
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if (Convert.ToBoolean(ViewState["UseDataSource1"]))
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{
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ViewState["UseDataSource1"] = false;
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table = DataSourceUtil.GetDataTable2();
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}
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else
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{
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ViewState["UseDataSource1"] = true;
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table = DataSourceUtil.GetDataTable();
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}
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Grid1.DataSource = table;
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Grid1.DataBind();
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}
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#region oldcode
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//protected void Button1_Click(object sender, EventArgs e)
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//{
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// Response.ClearContent();
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// Response.AddHeader("content-disposition", "attachment; filename=myexcel.xls");
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// Response.ContentType = "application/excel";
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// Response.ContentEncoding = System.Text.Encoding.UTF8;
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// Response.Write(GetGridTableHtml(Grid1));
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// Response.End();
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//}
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//private string GetGridTableHtml(Grid grid)
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//{
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// StringBuilder sb = new StringBuilder();
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// sb.Append("<meta http-equiv=\"content-type\" content=\"application/excel; charset=UTF-8\"/>");
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// sb.Append("<table cellspacing=\"0\" rules=\"all\" border=\"1\" style=\"border-collapse:collapse;\">");
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// sb.Append("<tr>");
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// foreach (GridColumn column in grid.Columns)
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// {
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// sb.AppendFormat("<td>{0}</td>", column.HeaderText);
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// }
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// sb.Append("</tr>");
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// foreach (GridRow row in grid.Rows)
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// {
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// sb.Append("<tr>");
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// foreach (GridColumn column in grid.Columns)
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// {
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// string html = row.Values[column.ColumnIndex].ToString();
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// if (column.ColumnID == "tfNumber")
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// {
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// html = (row.FindControl("spanNumber") as System.Web.UI.HtmlControls.HtmlGenericControl).InnerText;
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// }
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// else if (column.ColumnID == "tfGender")
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// {
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// html = (row.FindControl("labGender") as AspNet.Label).Text;
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// }
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// sb.AppendFormat("<td>{0}</td>", html);
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// }
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// sb.Append("</tr>");
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// }
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// sb.Append("</table>");
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// return sb.ToString();
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//}
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#endregion
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protected void Button1_Click(object sender, EventArgs e)
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{
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Response.ClearContent();
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Response.AddHeader("content-disposition", "attachment; filename=myexcel.xls");
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Response.ContentType = "application/excel";
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Response.ContentEncoding = System.Text.Encoding.UTF8;
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Response.Write(GetGridTableHtml(Grid1));
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Response.End();
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}
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private string GetGridTableHtml(Grid grid)
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{
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StringBuilder sb = new StringBuilder();
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MultiHeaderTable mht = new MultiHeaderTable();
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mht.ResolveMultiHeaderTable(Grid1.Columns);
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sb.Append("<meta http-equiv=\"content-type\" content=\"application/excel; charset=UTF-8\"/>");
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sb.Append("<table cellspacing=\"0\" rules=\"all\" border=\"1\" style=\"border-collapse:collapse;\">");
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foreach (List<object[]> rows in mht.MultiTable)
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{
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sb.Append("<tr>");
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foreach (object[] cell in rows)
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{
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int rowspan = Convert.ToInt32(cell[0]);
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int colspan = Convert.ToInt32(cell[1]);
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GridColumn column = cell[2] as GridColumn;
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sb.AppendFormat("<th{0}{1}{2}>{3}</th>",
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rowspan != 1 ? " rowspan=\"" + rowspan + "\"" : "",
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colspan != 1 ? " colspan=\"" + colspan + "\"" : "",
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colspan != 1 ? " style=\"text-align:center;\"" : "",
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column.HeaderText);
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}
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sb.Append("</tr>");
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}
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foreach (GridRow row in grid.Rows)
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{
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sb.Append("<tr>");
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foreach (GridColumn column in mht.Columns)
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{
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string html = row.Values[column.ColumnIndex].ToString();
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if (column.ColumnID == "tfNumber")
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{
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html = (row.FindControl("spanNumber") as System.Web.UI.HtmlControls.HtmlGenericControl).InnerText;
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}
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else if (column.ColumnID == "tfGender")
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{
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html = (row.FindControl("labGender") as AspNet.Label).Text;
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}
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sb.AppendFormat("<td>{0}</td>", html);
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}
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sb.Append("</tr>");
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}
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sb.Append("</table>");
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return sb.ToString();
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}
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#region 多表头处理
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/// <summary>
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/// 处理多表头的类
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/// </summary>
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public class MultiHeaderTable
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{
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// 包含 rowspan，colspan 的多表头，方便生成 HTML 的 table 标签
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public List<List<object[]>> MultiTable = new List<List<object[]>>();
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// 最终渲染的列数组
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public List<GridColumn> Columns = new List<GridColumn>();
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public void ResolveMultiHeaderTable(GridColumnCollection columns)
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{
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List<object[]> row = new List<object[]>();
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foreach (GridColumn column in columns)
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{
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object[] cell = new object[4];
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cell[0] = 1; // rowspan
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cell[1] = 1; // colspan
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cell[2] = column;
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cell[3] = null;
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row.Add(cell);
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}
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ResolveMultiTable(row, 0);
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ResolveColumns(row);
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}
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private void ResolveColumns(List<object[]> row)
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{
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foreach (object[] cell in row)
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{
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GroupField groupField = cell[2] as GroupField;
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if (groupField != null && groupField.Columns.Count > 0)
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{
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List<object[]> subrow = new List<object[]>();
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foreach (GridColumn column in groupField.Columns)
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{
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subrow.Add(new object[]
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{
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1,
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1,
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column,
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groupField
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});
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}
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ResolveColumns(subrow);
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}
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else
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{
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Columns.Add(cell[2] as GridColumn);
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}
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}
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}
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private void ResolveMultiTable(List<object[]> row, int level)
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{
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List<object[]> nextrow = new List<object[]>();
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foreach (object[] cell in row)
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{
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GroupField groupField = cell[2] as GroupField;
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if (groupField != null && groupField.Columns.Count > 0)
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{
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// 如果当前列包含子列，则更改当前列的 colspan，以及增加父列（向上递归）的colspan
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cell[1] = Convert.ToInt32(groupField.Columns.Count);
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PlusColspan(level - 1, cell[3] as GridColumn,groupField.Columns.Count - 1);
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foreach (GridColumn column in groupField.Columns)
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{
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nextrow.Add(new object[]
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{
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1,
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1,
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column,
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groupField
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});
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}
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}
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}
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MultiTable.Add(row);
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// 如果当前下一行，则增加上一行（向上递归）中没有子列的列的 rowspan
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if (nextrow.Count > 0)
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{
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PlusRowspan(level);
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ResolveMultiTable(nextrow, level + 1);
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}
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}
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private void PlusRowspan(int level)
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{
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if (level < 0)
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{
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return;
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}
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foreach (object[] cells in MultiTable[level])
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{
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GroupField groupField = cells[2] as GroupField;
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if (groupField != null && groupField.Columns.Count > 0)
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{
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// ...
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}
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else
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{
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cells[0] = Convert.ToInt32(cells[0]) + 1;
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}
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}
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PlusRowspan(level - 1);
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}
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private void PlusColspan(int level, GridColumn parent, int plusCount)
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{
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if (level < 0)
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{
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return;
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}
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foreach (object[] cells in MultiTable[level])
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{
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GridColumn column = cells[2] as GridColumn;
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if (column == parent)
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{
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cells[1] = Convert.ToInt32(cells[1]) + plusCount;
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PlusColspan(level - 1, cells[3] as GridColumn, plusCount);
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}
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}
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}
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}
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#endregion
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#endregion
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}
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}
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