我有这个excel文件，它目前将我的c＃应用程序中的内容写入其单元格内容：
private void button8_Click(object sender, EventArgs e)
{
Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
if (xlApp == null)
{
MessageBox.Show("Excel is not properly installed!!");
return;
}
Excel.Workbook xlWorkBook;
Excel.Worksheet xlWorkSheet;
object misValue = System.Reflection.Missing.Value;
xlWorkBook = xlApp.Workbooks.Add(misValue);
xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
xlWorkSheet.Cells[1, 1] = comboBox2.Text;
xlWorkSheet.Cells[1, 2] = textBox5.Text;
xlWorkSheet.Cells[1, 3] = textBox2.Text;
xlWorkSheet.Cells[1, 4] = comboBox3.Text;
xlWorkSheet.Cells[1, 5] = textBox3.Text;
xlWorkSheet.Cells[1, 6] = comboBox1.Text;
xlWorkBook.SaveAs(@"cross_check.xls", Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
xlWorkBook.Close(true, misValue, misValue);
xlApp.Quit();
Marshal.ReleaseComObject(xlWorkSheet);
Marshal.ReleaseComObject(xlWorkBook);
Marshal.ReleaseComObject(xlApp);
MessageBox.Show("Excel file created succcessfully");
}
}
如何附加到已创建的同一文件？要进一步扩展，目前我必须指定必须添加值的单元格。我怎么喜欢以某种方式增加，以至于无论用户点击添加到文件按钮多少次，它都应该增加前一个模式。 例如。我有：
xlWorkSheet.Cells[1, 1] = comboBox2.Text;
xlWorkSheet.Cells[1, 2] = textBox5.Text;
xlWorkSheet.Cells[1, 3] = textBox2.Text;
xlWorkSheet.Cells[1, 4] = comboBox3.Text;
xlWorkSheet.Cells[1, 5] = textBox3.Text;
xlWorkSheet.Cells[1, 6] = comboBox1.Text;
单击按钮后，我现在如何按照此模式进行操作：
xlWorkSheet.Cells[2, 1] = comboBox2.Text;
xlWorkSheet.Cells[2, 2] = textBox5.Text;
xlWorkSheet.Cells[2, 3] = textBox2.Text;
xlWorkSheet.Cells[2, 4] = comboBox3.Text;
xlWorkSheet.Cells[2, 5] = textBox3.Text;
xlWorkSheet.Cells[2, 6] = comboBox1.Text;
答案 0 :(得分：1)
我想你通过使用Excel对象 Microsoft.Office.Interop.Excel引用。然后你必须修改你的代码 如下
private void button8_Click(object sender, EventArgs e)
{
Microsoft.Office.Interop.Excel.Application xlApp; //Declare the
//Excel object
try
{
xlApp = (Microsoft.Office.Interop.Excel.Application)System.Runtime.InteropServices.Marshal.GetActiveObject("Excel.Application");
}
catch (Exception ee)
{
xlApp = new Microsoft.Office.Interop.Excel.Application();
if (xlApp == null)
{
MessageBox.Show("Excel is not properly installed!!");
return;
}
}
if (xlApp == null)
{
MessageBox.Show("Excel is not properly installed!!");
return;
}
object misValue = System.Reflection.Missing.Value;
Microsoft.Office.Interop.Excel.Workbook xlWorkBook=xlApp.Workbooks.Add(misValue);
try
{
xlWorkBook = xlApp.Workbooks.Open(@"cross_check.xls");//,
}
catch (Exception ex)
{
;//
}
Microsoft.Office.Interop.Excel.Range range;
Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet =
(Microsoft.Office.Interop.Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
int rownum = 1;
int MAX_ROWS=30000; //You may define your own limit
bool written = true;
range = xlWorkSheet.UsedRange;
while ((written) && (rownum<MAX_ROWS))
{
var test = (range.Cells[rownum, 1] as
Microsoft.Office.Interop.Excel.Range).Value2;
if (test != null)
{
rownum++;
}
else
{
written = false;
}
}
if (written == false)
{
xlWorkSheet.Cells[rownum, 1] = comboBox2.Text;
xlWorkSheet.Cells[rownum, 2] = textBox5.Text;
xlWorkSheet.Cells[rownum, 3] = textBox2.Text;
xlWorkSheet.Cells[rownum, 4] = comboBox3.Text;
xlWorkSheet.Cells[rownum, 5] = textBox3.Text;
xlWorkSheet.Cells[rownum, 6] = comboBox1.Text;
}
xlApp.DisplayAlerts = false; //Disables the prompts
xlWorkBook.SaveAs(@"cross_check.xls", Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlShared, misValue, misValue, misValue, misValue, misValue);
xlApp.DisplayAlerts = true; //
xlWorkBook.Close(true, misValue, misValue);
xlApp.Quit();
Marshal.ReleaseComObject(xlWorkSheet);
Marshal.ReleaseComObject(xlWorkBook);
Marshal.ReleaseComObject(xlApp);
MessageBox.Show("Excel file created/updated succcessfully");
}
在代码的第一步检查Excel对象（如果已经存在） 正在运行。如果是这样，我们不会创建新的Excel对象，但我们使用系统中运行的对象。然后正确创建或更新工作簿。保存时，必须使用
保存 Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlShared
为了能够重新打开并更新它。
为了加速输入您可能使用的修改后代码的数据，请使用
你应该添加一个额外的按钮，例如button9并使用click事件中的引用代码，并对您输入数据的button8进行必要的修改。 此外，您必须声明变量xlApp，xlWorkBook，xlWorkSheet等 是全局的和PUBLIC，如下面的代码所示，
............
public bool startd = false;
public int rownum;
public int MAX_ROWS = 30000;//You may define your own limit here
public bool isFirstTime = true;
public string oldBtnFileText;
public string oldBtnDataText;
public Microsoft.Office.Interop.Excel.Application xlApp;
public Microsoft.Office.Interop.Excel.Workbook xlWorkBook;
public Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet;
public Microsoft.Office.Interop.Excel.Range range;
public object misValue;
private void button8_Click(object sender, EventArgs e)
{
if (startd == false)
{
return;
}
if (isFirstTime == true)
{
bool written = true;
int rnum = 1;
if (xlWorkSheet!=null)
{
range=xlWorkSheet.UsedRange;
while ((written) && (rnum < MAX_ROWS))
{
var test = (range.Cells[rnum, 1] as Microsoft.Office.Interop.Excel.Range).Value2;
if (test != null)
{
rnum++;
}
else
{
written = false;
}
}
if (written == false)
{
rownum = rnum;
isFirstTime = false;
}
else
{
MessageBox.Show("The current WorkSheet is Full");
return;
}
}
}
if (xlWorkSheet!=null)
{
xlWorkSheet.Cells[rownum, 1] = comboBox2.Text;
xlWorkSheet.Cells[rownum, 2] = textBox5.Text;
xlWorkSheet.Cells[rownum, 3] = textBox2.Text;
xlWorkSheet.Cells[rownum, 4] = comboBox3.Text;
xlWorkSheet.Cells[rownum, 5] = textBox3.Text;
xlWorkSheet.Cells[rownum, 6] = comboBox1.Text;
rownum++;
}
}
private void button9_Click(object sender, EventArgs e)
{
if (startd == false)
{
try
{
xlApp = (Microsoft.Office.Interop.Excel.Application)System.Runtime.InteropServices.Marshal.GetActiveObject("Excel.Application");
}
catch (Exception ee)
{
xlApp = new Microsoft.Office.Interop.Excel.Application();
if (xlApp == null)
{
MessageBox.Show("Excel is not properly installed!!");
return;
}
}
if (xlApp == null)
{
MessageBox.Show("Excel is not properly installed!!");
return;
}
misValue = System.Reflection.Missing.Value;
xlWorkBook = xlApp.Workbooks.Add(misValue);
try
{
xlWorkBook = xlApp.Workbooks.Open(@"cross_check.xls");//,
}
catch (Exception ex)
{
;//
}
xlWorkSheet = (Microsoft.Office.Interop.Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
oldBtnFileText = button9.Text.ToString();
button9.Text = "File Ready to accept data";
oldBtnDataText = button1.Text.ToString();
button8.Text = "Enter Data";
startd = true;
}
else
{
xlApp.DisplayAlerts = false;
xlWorkBook.SaveAs(@"cross_check.xls", Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlShared, misValue, misValue, misValue, misValue, misValue);
xlApp.DisplayAlerts = true;
xlWorkBook.Close(true, misValue, misValue);
xlApp.Quit();
Marshal.ReleaseComObject(xlWorkSheet);
Marshal.ReleaseComObject(xlWorkBook);
Marshal.ReleaseComObject(xlApp);
MessageBox.Show("Excel file created/updated succcessfully");
startd = false;
button9.Text = oldBtnFileText; //Restore the initial captions
button8.Text = oldBtnDataText;//...
}
}
//
希望这些有用。