请使用以下代码帮助修复将数据从Excel文档导入DataGridView控件的问题：

private void button5_Click(object sender, EventArgs e)
{
    Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
    Excel.Workbook workbook =app.Workbooks.Open(@"C:\Users\Admin\Desktop\Dropbox\Vandit's Folder\Internship\test.xlsx");
    Excel.Worksheet worksheet = workbook.ActiveSheet;

    rcount = worksheet.UsedRange.Rows.Count;

    int i = 0;

    for(;i<rcount;i++)
    {
        dataGridView1.Rows[i].Cells["Column1"].Value = worksheet.Cells[i + 1, 1].Value;
        dataGridView1.Rows[i].Cells["Column2"].Value = worksheet.Cells[i + 1, 2].Value;
    }
}

当我运行这段代码时,我总是会收到一个异常的提示

"Index was out of range. Must be non-negative and less than the size of the collection."
"Parameter name: index."

解决方法:

假设dataGridView1有2列,

private void button5_Click(object sender, EventArgs e)
{
    Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
    Excel.Workbook workbook =app.Workbooks.Open(@"C:\Users\Admin\Desktop\Dropbox\Vandit's Folder\Internship\test.xlsx");
    Excel.Worksheet worksheet = workbook.ActiveSheet;

    rcount = worksheet.UsedRange.Rows.Count;

    int i = 0;        

    for(;i<rcount;i++)
    {
        //dataGridView1.Rows[i].Cells["Column1"].Value = worksheet.Cells[i + 1, 1].Value;
        //dataGridView1.Rows[i].Cells["Column2"].Value = worksheet.Cells[i + 1, 2].Value;
        dataGridView1.Rows.Add(worksheet.Cells[i + 1, 1].Value, worksheet.Cells[i + 1, 2].Value);
    }
}

假设dataGridView1有0列,

private void button5_Click(object sender, EventArgs e)
{
    Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
    Excel.Workbook workbook =app.Workbooks.Open(@"C:\Users\Admin\Desktop\Dropbox\Vandit's Folder\Internship\test.xlsx");
    Excel.Worksheet worksheet = workbook.ActiveSheet;

    rcount = worksheet.UsedRange.Rows.Count;

    int i = 0;

    //Initializing Columns
    dataGridView1.ColumnCount = worksheet.UsedRange.Columns.Count;
    for(int x=0;x<dataGridView1.ColumnCount;x++)
    {
            dataGridView1.Columns[x].Name = "Column "+x.ToString();
    }

    for(;i<rcount;i++)
    {
        //dataGridView1.Rows[i].Cells["Column1"].Value = worksheet.Cells[i + 1, 1].Value;
        //dataGridView1.Rows[i].Cells["Column2"].Value = worksheet.Cells[i + 1, 2].Value;
        dataGridView1.Rows.Add(worksheet.Cells[i + 1, 1].Value, worksheet.Cells[i + 1, 2].Value);
    }
}