在C 中将数据库数据分行和列保存到Excel中计算机二级考试
文章作者 100test 发表时间 2009:04:10 00:04:54
来源 100Test.Com百考试题网
如何在C 中将数据库数据分行和列保存到Excel中? 程序中的数据在StringGrid控件中显示的,那如何按照StringGrid显示的格式分行分列保存到Excel表格呢?请看如下两种方法的实现:
第一种方法:采用的一格一格填充数据 Variant ExcelApp,WorkBook1,WorkSheet1.
//-------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//-------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
AnsiString FileName = ExtractFileDir(Application->.ExeName ) "\\a.xls".
try
{
ExcelApp=Variant::CreateObject("Excel.Application").
}
catch(...)
{
ShowMessage("Sorry!Excel cannot be launched").
return.
}
ExcelApp.OlePropertySet("Visible",true).
ExcelApp.OlePropertyGet("WorkBooks").OleProcedure("Open",FileName.c_str()).
WorkBook1=ExcelApp.OlePropertyGet("ActiveWorkBook").
WorkSheet1=WorkBook1.OlePropertyGet("ActiveSheet").
for(int i=0.i<.StringGrid1->.RowCount.i )
{
for(int j=0.j<.StringGrid1->.ColCount.j )
{
WorkSheet1.OlePropertyGet("Cells", i 1 , j 1 )
.OlePropertySet("Value",StringGrid1->.Cells[j][i].c_str() ) .
}
}
ExcelApp.OlePropertyGet("ActiveWorkbook")
.OleFunction("SaveAs", FileName.c_str()).
ExcelApp.OleFunction("Quit").
WorkSheet1 = Unassigned.
WorkBook1 = Unassigned.
ExcelApp = Unassigned.
}
第二种方法:直接从ADO把数据导出来 Variant ExcelApp.
Variant WorkBook1.
Variant Sheet1.
Variant Range.
Variant Table.
Variant QueryTables.
int Count.
AnsiString ITemp,IStr.
AnsiString sSQL,sSQLHj, sWhere, sStartDate, sEndDate, sDate.
try
{
ExcelApp=CreateOleObject ("Excel.Application").
}
catch(...)
{
ShowMessage("运行出错,请确认装了Excel").
return.
}
ExcelApp.OlePropertyGet("WorkBooks").OleFunction("Add").
ExcelApp.OlePropertyGet("workbooks").OleFunction("Add", "E:\\Lxrb6.xls").
WorkBook1=ExcelApp.OlePropertyGet("ActiveWorkBook").
Sheet1 = WorkBook1.OlePropertyGet("ActiveSheet").
WorkBook1.OlePropertyGet("Sheets", 1).OleProcedure("Select").
Sheet1.OlePropertySet("name","小热报6").
Range=Sheet1.OlePropertyGet("Range","A9").
QueryTables=Sheet1.OlePropertyGet("QueryTables").
sSQL="0select * from Table" //这里的数据很多,我随便简化下!
qryTmp->.Active=false.
qryTmp->.SQL->.Clear().
qryTmp->.SQL->.Add(sSQL).
qryTmp->.Active=true.
Count=qryTmp->.RecordCount 12.
IStr="A9:M" IntToStr(Count).
Table=QueryTables.OleFunction("Add",qryTmp->.Recordset,Range).
Table.OlePropertySet("FieldNames",false).
Range=Sheet1.OlePropertyGet("Range", IStr.c_str()).
Sheet1.OlePropertyGet("Range", "A:K").OlePropertyGet("Columns").OleProcedure("AutoFit"). //自动列宽
Table.OleProcedure("Refresh",true).
WorkBook1.OleFunction("SaveAs", "E:\\6.xls").
ShowMessage("导出完毕,请检查").
qryTmp->.Active=false.
ExcelApp.Exec(Procedure("Quit")).
ExcelApp = Unassigned.