c#读写excel文件使用示例

/// <summary>
/// 从Excel获取数据
/// </summary>
/// <typeparam name="T">对象</typeparam>
/// <param name="filePath">文件完整路径</param>
/// <returns>对象列表</returns>
public List<T> GetObjectList<T>(string filePath) where T : new()
{
    List<T> list = new List<T>();
    if (!filePath.Trim().EndsWith("csv") && !filePath.Trim().EndsWith("xlsx"))
    {
return list;
    }

    Type type = typeof(T);
    Workbook workbook = new Workbook(filePath);
    Worksheet sheet = workbook.Worksheets[0];

    // 获取标题列表
    var titleDic = this.GetTitleDic(sheet);

    // 循环每行数据
    for (int i = 1; i < int.MaxValue; i++)
    {
// 行为空时结束
if (string.IsNullOrEmpty(sheet.Cells[i, 0].StringValue))
{
    break;
}

T instance = new T();

// 循环赋值每个属性
foreach (var item in type.GetProperties())
{
    if (titleDic.ContainsKey(item.Name))
    {
string str = sheet.Cells[i, titleDic[item.Name]].StringValue;
if (!string.IsNullOrEmpty(str))
{
    try
    {
// 根据类型进行转换赋值
if (item.PropertyType == typeof(string))
{
    item.SetValue(instance, str);
}
else if (item.PropertyType.IsEnum)
{
    item.SetValue(instance, int.Parse(str));
}
else
{
    MethodInfo method = item.PropertyType.GetMethod("Parse", new Type[] { typeof(string) });
    object obj = null;
    if (method != null)
    {
obj = method.Invoke(null, new object[] { str });
item.SetValue(instance, obj);
    }
}
    }
    catch (Exception)
    {
// 获取错误
    }
}
    }
}

list.Add(instance);
    }

    return list;
}

/// <summary>
/// 把对象List保存到Excel
/// </summary>
/// <typeparam name="T">对象</typeparam>
/// <param name="objList">对象列表</param>
/// <param name="saveFilePath">保存文件的完整路径,包括文件类型</param>
public void SetExcelList<T>(List<T> objList, string saveFilePath)
{
    if (!saveFilePath.Trim().EndsWith("csv") && !saveFilePath.Trim().EndsWith("xlsx"))
    {
return;
    }

    Workbook workbook = new Workbook();
    Worksheet sheet = workbook.Worksheets[0];

    // 冻结第一行
    sheet.FreezePanes(1, 1, 1, 0);

    // 循环插入每行
    int row = 0;
    foreach (var obj in objList)
    {
int column = 0;
var properties = obj.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.IgnoreCase | BindingFlags.DeclaredOnly);
if (row == 0)
{
    foreach (var titName in properties)
    {
sheet.Cells[0, column].PutValue(titName.Name);
column++;
    }

    row++;
}

// 循环插入当前行的每列
column = 0;
foreach (var property in properties)
{
    var itemValue = property.GetValue(obj);
    sheet.Cells[row, column].PutValue(itemValue.ToString());
    column++;
}

row++;
    }

    workbook.Save(saveFilePath);
}

/// <summary>
/// 获取标题行数据
/// </summary>
/// <param name="sheet">sheet</param>
/// <returns>标题行数据</returns>
private Dictionary<string, int> GetTitleDic(Worksheet sheet)
{
    Dictionary<string, int> titList = new Dictionary<string, int>();
    for (int i = 0; i < int.MaxValue; i++)
    {
if (sheet.Cells[0, i].StringValue == string.Empty)
{
    return titList;
}

titList.Add(sheet.Cells[0, i].StringValue, i);
    }

    return titList;
}