//加载excel
public dataset loaddatafromexcel(string filepath)
{
try
{
string strconn;
//strconn = "provider=microsoft.jet.oledb.4.0;data source=" + filepath + ";extended properties='excel 8.0;hdr=false;imex=1'";
strconn = string.format("provider=microsoft.ace.oledb.12.0;data source={0};extended properties='excel 8.0;hdr=yes;imex=1;'", filepath);
oledbconnection oleconn = new oledbconnection(strconn);
oleconn.open();
string sql = "select * from [sheet1$]";//可是更改sheet名称，比如sheet2，等等
oledbdataadapter oledaexcel = new oledbdataadapter(sql, oleconn);
dataset oledsexcle = new dataset();
oledaexcel.fill(oledsexcle, "sheet1");
oleconn.close();
return oledsexcle;
}
catch (exception err)
{
return null;
}
}
/// <summary>
/// datatable直接导出excel,此方法会把datatable的数据用excel打开,再自己手动去保存到确切的位置
/// </summary>
/// <param name="dt">要导出excel的datatable</param>
/// <returns></returns>
public bool doexport(system.data.datatable dt)
{
microsoft.office.interop.excel.application app = new applicationclass();
if (app == null)
{
throw new exception("excel无法启动");
}
app.visible = true;
workbooks wbs = app.workbooks;
workbook wb = wbs.add(missing.value);
worksheet ws = (worksheet)wb.worksheets[1];
int cnt = dt.rows.count;
int columncnt = dt.columns.count;
// *****************获取数据********************
object[,] objdata = new object[cnt + 1, columncnt]; // 创建缓存数据
// 获取列标题
for (int i = 0; i < columncnt; i++)
{
objdata[0, i] = dt.columns[i].columnname;
}
// 获取具体数据
for (int i = 0; i < cnt; i++)
{
system.data.datarow dr = dt.rows[i];
for (int j = 0; j < columncnt; j++)
{
objdata[i + 1, j] = dr[j];
}
}
//********************* 写入excel******************
range r = ws.get_range(app.cells[1, 1], app.cells[cnt + 1, columncnt]);
r.numberformat = "@";
//r = r.get_resize(cnt+1, columncnt);
r.value2 = objdata;
r.entirecolumn.autofit();
app = null;
return true;
}
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