关于DevExpress Winform 的所有可打印控件的导出excel 的通用方法，并且解决DevExpress控件自带的方法存在的缺陷问题
1、解决GridControl自带方法不能导出图片；
2、GridControl 的BandGridView 多表头无法导出等问题；
3、解决PivotGridControl导出时候自动分组的问题；
4、支持多个控件一同导出同一个excel 等等
调用该方法真正做到控件的所见所得的导出功能。
/// <summary>
/// DevExpress通用导出Excel,支持多个控件同时导出在同一个Sheet表
/// eg:ExportToXlsx("",gridControl1,gridControl2);
/// 将gridControl1和gridControl2的数据一同导出到同一张工作表
/// </summary>
/// <param name="title">文件名</param>
/// <param name="panels">控件集</param>
public void ExportToExcel(string title, params IPrintable[] panels)
{
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.FileName = title;
saveFileDialog.Title = "导出Excel";
saveFileDialog.Filter = "Excel文件(*.xlsx)|*.xlsx|Excel文件(*.xls)|*.xls";
DialogResult dialogResult = saveFileDialog.ShowDialog();
if (dialogResult == DialogResult.Cancel)
return;
string FileName = saveFileDialog.FileName;
PrintingSystem ps = new PrintingSystem();
CompositeLink link = new CompositeLink(ps);
ps.Links.Add(link);
foreach (IPrintable panel in panels)
{
link.Links.Add(CreatePrintableLink(panel));
}
link.Landscape = true;//横向
//判断是否有标题，有则设置
//link.CreateDocument(); //建立文档
try
{
int count = 1;
//在重复名称后加（序号）
while (File.Exists(FileName))
{
if (FileName.Contains(")."))
{
int start = FileName.LastIndexOf("(");
int end = FileName.LastIndexOf(").") - FileName.LastIndexOf("(") + 2;
FileName = FileName.Replace(FileName.Substring(start, end), string.Format("({0}).", count));
}
else
{
FileName = FileName.Replace(".", string.Format("({0}).", count));
}
count++;
}
if (FileName.LastIndexOf(".xlsx") >= FileName.Length - 5)
{
XlsxExportOptions options = new XlsxExportOptions();
link.ExportToXlsx(FileName, options);
}
else
{
XlsExportOptions options = new XlsExportOptions();
link.ExportToXls(FileName, options);
}
if (DevExpress.XtraEditors.XtraMessageBox.Show("保存成功，是否打开文件？", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Information) == DialogResult.Yes)
System.Diagnostics.Process.Start(FileName);//打开指定路径下的文件
}
catch (Exception ex)
{
DevExpress.XtraEditors.XtraMessageBox.Show(ex.Message);
}
}
/// <summary>
/// 创建打印Componet
/// </summary>
/// <param name="printable"></param>
/// <returns></returns>
PrintableComponentLink CreatePrintableLink(IPrintable printable)
{
ChartControl chart = printable as ChartControl;
if (chart != null)
chart.OptionsPrint.SizeMode = DevExpress.XtraCharts.Printing.PrintSizeMode.Stretch;
PrintableComponentLink printableLink = new PrintableComponentLink() { Component = printable };
return printableLink;
}