string DBPath = "";
OleDbConnection conn;
public static int ColumnNumber(string colAdress)
{
int[] digits = new int[colAdress.Length];
for (int i = 0; i < colAdress.Length; ++i)
{
digits[i] = Convert.ToInt32(colAdress[i]) - 64;
}
int mul = 1; int res = 0;
for (int pos = digits.Length - 1; pos >= 0; --pos)
{
res += digits[pos] * mul;
mul *= 26;
}
return res;
}
private string GetAllNamesForCreate(string[] strArr)
{
string result = "";
Microsoft.Office.Interop.Excel.Application app = (Excel.Application)System.Runtime.InteropServices.Marshal.GetActiveObject("Excel.Application");
Excel.Application xlApp = new Excel.Application();
Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(@"your excel path", 0, true, 5, "", "", true, Excel.XlPlatform.xlWindows, "", false, false, 0, true, false, false);
Excel._Worksheet xlWorksheet = xlWorkbook.Sheets[1];
Excel.Range xlRange = xlWorksheet.UsedRange;
for (int i=0;i<strArr.Length;i++)
{
int col = ColumnNumber(strArr[i]);
string colName = Convert.ToString(xlWorksheet.Cells[1, col].Value);
result += " [" + colName + "]" + " Text,";
}
xlWorkbook.Close(0);
xlApp.Quit();
return result.Remove(result.Length-1,1);
}
private string GetAllNamesForSelect(string[] strArr)
{
string result = "";
Excel.Application xlApp = new Excel.Application();
Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(@"excel path", 0, true, 5, "", "", true, Excel.XlPlatform.xlWindows, "", false, false, 0, true, false, false);
Excel._Worksheet xlWorksheet = xlWorkbook.Sheets[1];
Excel.Range xlRange = xlWorksheet.UsedRange;
for (int i = 0; i < strArr.Length; i++)
{
int col = ColumnNumber(strArr[i]);
string colName = Convert.ToString(xlWorksheet.Cells[1, col].Value);
result += " [" + colName + "],";
}
xlWorkbook.Close(0);
xlApp.Quit();
return result.Remove(result.Length - 1, 1);
}
private void button1_Click(object sender, EventArgs e)
{
string[] arr = { "C", "D" };
DBPath = @"your Access database path";
if (!File.Exists(DBPath))
{
ADOX.Catalog cat = new ADOX.Catalog();
cat.Create(Convert.ToString("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=") + DBPath);
cat = null;
}
conn = new OleDbConnection(Convert.ToString("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=") + DBPath);
conn.Open();
try
{
using (OleDbCommand cmd = new OleDbCommand($"CREATE TABLE [TEST] ([id] COUNTER PRIMARY KEY, {GetAllNamesForCreate(arr)} );", conn))
{
cmd.ExecuteNonQuery();
}
}
catch (Exception ex)
{
if (ex != null)
ex = null;
}
string path;
path = @"excel path";
string _conn = "provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + path + ";Extended Properties=\'Excel 8.0;HDR=Yes;IMEX=1;\';";
try
{
using (OleDbConnection conn = new OleDbConnection(_conn))
{
using (OleDbCommand cmd = new OleDbCommand())
{
cmd.Connection = conn;
cmd.CommandText = "INSERT INTO [MS Access;Database=" + DBPath + $"].[test] SELECT {GetAllNamesForSelect(arr)} FROM [Sheet1$]";
conn.Open();
cmd.ExecuteNonQuery();
}
}
MessageBox.Show("The import is complete!");
}
catch (Exception e1)
{
MessageBox.Show("Import Failed, correct Column name in the sheet!" + Environment.NewLine + "Error Message:" + Environment.NewLine + e1.Message);
}
}
- 打开一张Excel表，将所有表名显示在combobox中，并根据所选的值将结果显示在datagridview中：
public string OpenFile()
{
OpenFileDialog OFD = new OpenFileDialog()
{
AddExtension = true,
CheckFileExists = true,
Filter = "Excel files Excel files (*.xls)|*.xls",
Multiselect = false,
Title = "Select an workbook to open"
};
if (OFD.ShowDialog() == DialogResult.OK)
return OFD.FileName;
else
return null;
}
string path;
private void button1_Click(object sender, EventArgs e)
{
path = OpenFile();
Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbook excelBook = xlApp.Workbooks.Open(path);
String[] excelSheets = new String[excelBook.Worksheets.Count];
int i = 0;
foreach (Microsoft.Office.Interop.Excel.Worksheet wSheet in excelBook.Worksheets)
{
excelSheets[i] = wSheet.Name;
i++;
}
comboBox1.Items.Clear();
comboBox1.Items.AddRange(excelSheets);
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
var ds = new DataSet();
string con = "provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + path + ";Extended Properties=\'Excel 8.0;HDR=NO;IMEX=1;\';";
using (OleDbConnection connection = new OleDbConnection(con))
{
connection.Open();
OleDbCommand cmd = new OleDbCommand();
OleDbDataAdapter oleda = new OleDbDataAdapter();
DataTable dt = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
string sheetName = string.Empty;
if (dt != null)
{
dt = (from dataRow in dt.AsEnumerable()
where !dataRow["TABLE_NAME"].ToString().Contains("FilterDatabase")
select dataRow).CopyToDataTable();
sheetName = dt.Rows[comboBox1.SelectedIndex]["TABLE_NAME"].ToString();
}
cmd.Connection = connection;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "SELECT * FROM [" + sheetName + "]";
oleda = new OleDbDataAdapter(cmd);
oleda.Fill(ds, "excelData");
}
dataGridView1.DataSource = ds.Tables["excelData"];
}