到目前为止,我已经设法获取整个Excel文件的列名,但我想做的是获取给定表(工作表)的Excel文件的列名。我该如何修改代码来实现这一目标。我已经尝试了一段时间,但没有取得积极的结果,非常感谢任何帮助。
public static List<String> ReadSpecificTableColumns(string filePath, string sheetName)
{
var columnList = new List<string>();
try
{
var excelConnection = new OleDbConnection("provider=Microsoft.ACE.OLEDB.12.0;Data Source='" + filePath + "';Extended Properties='Excel 12.0;IMEX=1'");
excelConnection.Open();
var columns = excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, null);
excelConnection.Close();
if (columns != null)
{
columnList.AddRange(from DataRow column in columns.Rows select column["Column_name"].ToString());
}
}
catch (Exception exception)
{
Console.WriteLine(exception.Message);
}
return columnList;
}
您没有在代码中包含工作表名称。
您可以尝试以下代码:
var adapter = new OleDbDataAdapter("SELECT * FROM [" +sheetName + "$]", excelConnection);
var ds = new DataSet();
adapter.Fill(ds, "myTable");
DataTable data = ds.Tables["myTable"];
foreach(DataColumn dc in data.Columns){
...
}
使用这样的代码片段怎么样:
var adapter = new OleDbDataAdapter("SELECT * FROM [" +sheetName + "$A1:Z1]", excelConnection);
var table = new DataTable();
adapter.Fill(table);
对于“HDR=Yes”的连接字符串,它将读取第一行,目标表将包含所有列,但没有数据。
你可以这样做:
private void ValidateExcelColumns(string filePath)
{
var connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filePath + ";Extended Properties=\"Excel 12.0;IMEX=1;HDR=Yes;TypeGuessRows=0;ImportMixedTypes=Text\""; ;
using (var conn = new OleDbConnection(connectionString))
{
conn.Open();
DataTable dt = new DataTable();
var sheets = conn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
using (var cmd = conn.CreateCommand())
{
cmd.CommandText = "SELECT TOP 1 * FROM [" + sheets.Rows[0]["TABLE_NAME"].ToString() + "] ";
var adapter = new OleDbDataAdapter(cmd);
adapter.Fill(dt);
}
foreach(DataColumn column in dt.Columns)
{
//Do something with your columns
}
}
}
我不得不去挖掘这个,因为它不是第一次点击。
这可以拉出列名:
using System;
using System.Linq;
using System.Data;
using System.Data.OleDb;
using System.Collections.Generic;
namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{
string excelFilePath = @"C:\myexcelfile.xlsx";
string providerString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=\"Excel 12.0 Xml; HDR=YES;IMEX=1\";";
List<string> columnNames = new List<string>();
using (OleDbConnection oleConn = new OleDbConnection(String.Format(providerString, excelFilePath)))
{
oleConn.Open();
DataTable schemaDT = oleConn.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, null);
DataRow[] shtRows = schemaDT.Select("[TABLE_NAME] = 'Sheet1$'");
columnNames = shtRows.Select(o => o.Field<string>("COLUMN_NAME")).ToList();
}
Console.WriteLine(String.Join("\n", columnNames));
Console.ReadLine();
}
}
}