服務端實現

/// <summary>
/// Excel檔案
/// </summary>
/// <param name="requestDto">請求引數</param>
/// <returns></returns>
[HttpPost("[action]")]
public async Task<FileResult> XXXExcelStream([FromBody] XXXQueryRequestDto requestDto)
{
    byte[] bytes = await new XXXService(this).GetXXXExcelInfo(requestDto);
    if (bytes == null)
    {
        return null;
    }
    return File(bytes, "application/octet-stream", $"XXX資料{System.DateTime.Now:yyyyMMddHHmmss}.xlsx");
}

/// <summary>
/// Excel陣列
/// </summary>
/// <param name="requestDto">請求引數</param>
/// <returns></returns>
[HttpPost("[action]")]
public async Task<ActionResult<byte[]>> XXXExcelInfo([FromBody] XXXQueryRequestDto requestDto)
{
    byte[] bytes = await new XXXService(this).GetXXXExcelInfo(requestDto);
    return bytes;
}
 

客戶端呼叫

private async Task BtnExportClickAsnc(XXXRequestDto dto, string fileName)
{
    var response = XXXAPI.XXXExcelStreamWithHttpMessagesAsync(dto);
    Stream stream = await response.Response.Content.ReadAsStreamAsync();
    if (stream != null)
    {
        using (FileStream fs = new FileStream(fileName, FileMode.Create, FileAccess.Write))
        {
            await stream.CopyToAsync(fs);
            fs.Flush();
        }
    }
}

private async Task BtnExportClickAsnc(XXXRequestDto dto, string fileName)
{
    var response = XXXAPI.XXXExcelInfoWithHttpMessagesAsync(dto);
    try
    {
        byte[] data = response.Body;
        File.WriteAllBytes(fileName, data);
    }
    catch (Exception ex)
    {
    }
}