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关于ASP.NET 将数据导出成Excel 的总结[补充]

2017-11-26 1177

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简介：

//打开一个空的Excel

Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
app.Workbooks.Add( true);
app.Visible = true;

//打开一个已经存在的Excel文件

Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
app.Workbooks.Add(路径和文件名);
app.Visible = true;

//读取Excel2003

conExcel.ConnectionString = " Provider=Microsoft.Jet.OLEDB.4.0;Data Source= " + filepath + " ;Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1\" ";

//读取Excel2007

conExcel.ConnectionString = " Provider=Microsoft.ACE.OLEDB.12.0;Data Source= " +filepath + " ;Extended Properties=\"Excel 12.0;HDR=YES\" ";

//设置禁止弹出保存和覆盖的询问提示框

app.DisplayAlerts = false;
app.AlertBeforeOverwriting = false;

//复制到指定的地方,默认路径为我的文档

wb.SaveCopyAs(@"D:\111.xlsx");

//新建一个Excel并保存到指定的路径

app = new Microsoft.Office.Interop.Excel.Application();
wb = app.Workbooks.Add( true);
app.Cells[ 1, 1] = " test ";

app.DisplayAlerts = false;
app.AlertBeforeOverwriting = false;
wb.SaveCopyAs( @" C:\111.xlsx ");
Close();

//直接读取Excel文件

DataTable myT=ExcelToDataTable( " D:/文件/新武昌站点资料.xls ", " sheet1 ");
String mystr=myT.Rows[ 0][ 0].ToString();
this.textBox1.Text=mystr;

//版本检测

string strPathResult = "";
string strVersionResult = "";
string strKeyName = " Path ";
object objResult = null;
Microsoft.Win32.RegistryValueKind regValueKind;
Microsoft.Win32.RegistryKey regKey = null;
Microsoft.Win32.RegistryKey regSubKey = null;

try
{
regKey = Microsoft.Win32.Registry.LocalMachine;

if (regSubKey == null)
{ // office97
regSubKey = regKey.OpenSubKey( @" SOFTWARE\Microsoft\Office\8.0\Common\InstallRoot ", false);
strVersionResult = " office97 ";
strKeyName = " OfficeBin ";
}

if (regSubKey == null)
{ // Office2000
regSubKey = regKey.OpenSubKey( @" SOFTWARE\Microsoft\Office\9.0\Common\InstallRoot ", false);
strVersionResult = " office2000 ";
strKeyName = " Path ";
}

if (regSubKey == null)
{ // officeXp
regSubKey = regKey.OpenSubKey( @" SOFTWARE\Microsoft\Office\10.0\Common\InstallRoot ", false);
strVersionResult = " officeXP ";
strKeyName = " Path ";
}

if (regSubKey == null)
{ // Office2003
regSubKey = regKey.OpenSubKey( @" SOFTWARE\Microsoft\Office\11.0\Common\InstallRoot ", false);
strVersionResult = " office2003 ";
strKeyName = " Path ";
}

if (regSubKey == null)
{ // office2007
regSubKey = regKey.OpenSubKey( @" SOFTWARE\Microsoft\Office\12.0\Common\InstallRoot ", false);
strVersionResult = " office2007 ";
strKeyName = " Path ";
}

objResult = regSubKey.GetValue(strKeyName);
regValueKind = regSubKey.GetValueKind(strKeyName);
if (regValueKind == Microsoft.Win32.RegistryValueKind.String)
{
strPathResult = objResult.ToString();
}
}
catch (System.Security.SecurityException ex)
{
throw new System.Security.SecurityException( " 您没有读取注册表的权限 ", ex);
}
catch (Exception ex)
{
throw new Exception( " 读取注册表出错! ", ex);
}
finally
{

if (regKey != null)
{
regKey.Close();
regKey = null;
}

if (regSubKey != null)
{
regSubKey.Close();
regSubKey = null;
}
}

MessageBox.Show(strVersionResult);

//获取行数

app = new Microsoft.Office.Interop.Excel.Application();
wb = app.Workbooks.Open(path, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value
, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);
ws = (Microsoft.Office.Interop.Excel.Worksheet)wb.Worksheets[ 1];

//行数
string count = ws.UsedRange.Rows.Count.ToString();

//读取某个单元格信息

Range r = (Range)ws.Cells[1, 1];
MessageBox.Show(r.Value2.ToString());

//删除一行数据(第一个单元格的位置)

public void DelRow( int row, string fPath)
{
OpenApp(fPath);
Range range = ws.UsedRange;
int columns = range.Columns.Count;
for ( int i = 0; i < columns; i++)
{
((Range)ws.Cells[row, i+ 1]).Delete(Missing.Value);
}
wb.Save();
Close();
}

//删除一列

public void DelCol( int col, string fPath)
{
OpenApp(fPath);
Range range = ws.UsedRange;
int rows = range.Rows.Count;
for ( int i = 0; i < rows; i++)
{
((Range)ws.Cells[ 1, col]).Delete(Missing.Value);
}
wb.Save();
Close();
}

//删除单元格

public void DelCell( int row, int col, string fPath)
{
OpenApp(fPath);
Range range = (Range)ws.Cells[row, col];
range.Delete(Missing.Value);
wb.Save();
Close();
}

在这里需要注意一下,在Excel表中,删除和清除是不一样的,清除(Clear)只是把内容清空,而单元格还在,删除(Del)是把一个单元格删除,下面的数据就会自动的对其,就会造成排版问题,这是需要注意的

//释放资源
因为引用的是COM组件,是非托管的代码,所以释放资源的代码就需要手动的编写,在网上查找了很多的代码都不好用,下面这个是比较好的。

public void Close()
{
if (app == null) return;
if (wb != null)
{
wb.Close( false, Missing.Value, Missing.Value);
ReleaseCom(wb);
wb = null;
}
this.app.Quit();
ReleaseCom(app);
app = null;
GC.Collect();
}
static private void ReleaseCom( object o)
{
try
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(o); // 强制释放一个对象
}
catch { }
finally
{
o = null;
}
}

//合并单元格

{
ws.get_Range(ws.Cells[x1, y1], ws.Cells[x2, y2]).Merge(Type.Missing);
}

public void UniteCells(string ws, int x1, int y1, int x2, int y2)
//合并单元格
{
GetSheet(ws).get_Range(GetSheet(ws).Cells[x1, y1], GetSheet(ws).Cells[x2, y2]).Merge(Type.Missing);

}

//Range可以获取一个单元格,也可以是多个单元格

获取一个

Range ran=(Range)ws.Cells[Row,Col];

获取多行

Range ran=ws.Get_Range(左上角单元格,右下角单元格);

Range ran=ws.Get_Range(ws.Cells[row,col],ws.Cells[row,Col]);

//设置格式

Range ra = (Range)ws.Cells[row + row + 4, col];
ra.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignRight;
ra.NumberFormatLocal = "#,##0.00";

//拷贝格式将ran选中的区域复制到ra选中的区域中

Range ran = ws.get_Range(ws.Cells[3,1],ws.Cells[4,9]);
Range ra = ws.get_Range(ws.Cells[5,1],ws.Cells[6,9]);
ran.Copy(ra);

本文转自钢钢博客园博客，原文链接：http://www.cnblogs.com/xugang/archive/2012/02/08/2342129.html，如需转载请自行联系原作者

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