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我正在尝试在我的应用程序中添加一个功能，用户可以从组合框中选择工作表。但是我遇到了一些障碍，我需要一些帮助！我之前能够读取 excel 文件，因为我已经使用了默认的工作表名称。但是现在我可以将工作表名称放入我的组合框中，但我现在似乎无法读取 excel 文件？请帮我

public static DataTable ExcelToDataTable (string fileName)
        {
            using (var stream = File.Open(fileName, FileMode.Open, FileAccess.Read))
            {
                using (var reader = ExcelReaderFactory.CreateReader(stream))
                {
                    var result = reader.AsDataSet(new ExcelDataSetConfiguration()
                    {
                        UseColumnDataType = true,
                        ConfigureDataTable = (data) => new ExcelDataTableConfiguration()
                        {
                            UseHeaderRow = true
                        }
                    });
                    DataTableCollection table = result.Tables;
                    DataTable resultTable = table["Sheet1"];                 
                    return resultTable;
                }
            }
        }

 private void btnOpen_Click(object sender, EventArgs e)
        {

            try
            {
                using (OpenFileDialog ofd = new OpenFileDialog() { Filter = "Excel 2003 Worksheet|*.xls|Excel 2007 Worksheet|*.xlsx", ValidateNames = true, Multiselect = false })
                {
                    if (ofd.ShowDialog() == DialogResult.OK)
                    {
                     dataGridView1.DataSource = ExcelToDataTable(ofd.FileName);
                    }

                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

现在

    public static DataSet ExcelToDataTable (string fileName)
            {
                using (var stream = File.Open(fileName, FileMode.Open, FileAccess.Read))
                {
                    using (var reader = ExcelReaderFactory.CreateReader(stream))
                    {
                        var result = reader.AsDataSet(new ExcelDataSetConfiguration()
                        {
                            UseColumnDataType = true,
                            ConfigureDataTable = (data) => new ExcelDataTableConfiguration()
                            {
                                UseHeaderRow = true
                            }
                        });
                        return result;
                    }
                }
            }

     private void btnOpen_Click(object sender, EventArgs e)
            {

                try
                {
                    using (OpenFileDialog ofd = new OpenFileDialog() { Filter = "Excel 2003 Worksheet|*.xls|Excel 2007 Worksheet|*.xlsx", ValidateNames = true, Multiselect = false })
                    {
                        if (ofd.ShowDialog() == DialogResult.OK)
                        {
                            comboBox1.Items.Clear();
                            foreach (DataTable dt in ExcelToDataTable(ofd.FileName).Tables)
                            {
                                comboBox1.Items.Add(dt.TableName);
                            }
                            DataTableCollection table = ExcelToDataTable(ofd.FileName).Tables;
                            DataTable resultTable = ExcelToDataTable(ofd.FileName).Tables[comboBox1.SelectedIndex];
                            dataGridView1.DataSource = resultTable
                        }

                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }

我可以知道出了什么问题吗？我收到一个错误，Cannot find table -1但我可以在 excel 中看到工作表名称，但看不到内容

4

1 回答 1

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首先在您的表单中使用一个DataSet属性：

private DataSet ExcelDateSet { get; set; }

并添加一个从中读取表的方法，如下所示：

private DataTable GetExcelDataTable(string sheetName)
{
    if (string.IsNullOrEmpty(sheetName) || !ExcelDateSet.Tables.Contains(sheetName))
    {
         // Notify user to select a sheet-name from your ComboBox!
         // or you can return first-sheet info as default like this:
         // return ExcelDateSet.Tables[0];
    }

    return ExcelDateSet.Tables[sheetName];
}

然后像这样设置它的值btnOpen_Click：

ExcelDataSet = ExcelToDataTable(ofd.FileName);
dataGridView1.DataSource = GetExcelDataTable(comboBox1.SelectedText);
dataGridView1.DataBind();
于 2018-06-11T11:15:41.063 回答