我确实有一个 excel 文件,我开发了一种方法来读取工作表 1 中的所有内容并将其填充到 ListView 中,基本上工作表在单元格 A-D 中有数据。但这个数字是120,000。当我运行代码时,它确实读取了这些文件,这需要时间,但在此过程中,对表单的任何操作(如最小化或单击任意位置的表单)都会卡住程序并导致其崩溃。我怎样才能像任何好的程序一样提高性能。下面是我的代码。
private void button1_Click(object sender, EventArgs e)
{
Microsoft.Office.Interop.Excel.Application ExcelObj = new
Microsoft.Office.Interop.Excel.Application();
OpenFileDialog openFileDialog1 = new OpenFileDialog();
// prepare open file dialog to only search for excel files (had
// trouble setting this in design view)
openFileDialog1.FileName = "*.xlsx";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
// Here is the call to Open a Workbook in Excel
// It uses most of the default values (except for the read-only
// which we set to true)
Workbook theWorkbook =
ExcelObj.Workbooks.Open(openFileDialog1.FileName, 0, true,
5,"", "", true, XlPlatform.xlWindows, "\t", false, false,
0, true);
// get the collection of sheets in the workbook
Sheets sheets = theWorkbook.Worksheets;
// get the first and only worksheet from the collection of
// worksheets
Worksheet worksheet = (Worksheet)sheets.get_Item(1);
// loop through 10 rows of the spreadsheet and place each row in
// the list view
for (int i = 1; i <= 10; i++)
{
Range range = worksheet.get_Range("A" + i.ToString(), "J" +
i.ToString());
System.Array myvalues = (System.Array)range.Cells.Value;
string[] strArray = ConvertToStringArray(myvalues);
listView1.Items.Add(new ListViewItem(strArray));
}
}
}
string[] ConvertToStringArray(System.Array values)
{
// create a new string array
string[] theArray = new string[values.Length];
// loop through the 2-D System.Array and populate the 1-D String
// Array
for (int i = 1; i <= values.Length; i++)
{
if (values.GetValue(1, i) == null)
theArray[i - 1] = "";
else
theArray[i - 1] = (string)values.GetValue(1, i).ToString();
}
return theArray;
}
最佳答案
- 我建议使用 OpenXML (https://github.com/OfficeDev/Open-XML-SDK) 而不是互操作
- 并使用类似 BackgroundWorker 的东西在后台读取文件 (https://msdn.microsoft.com/en-us/library/system.componentmodel.backgroundworker(v=vs.110).aspx)
关于c# - 读取大型 Excel 工作表时的内存优化,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46837456/