#region 删除DataTable重复列，类似distinct
/// <summary>
/// 删除DataTable重复列，类似distinct
/// </summary>
/// <param name="dt">DataTable</param>
/// <param name="Field">字段名</param>
/// <returns></returns>
public static DataTable DeleteSameRow(DataTable dt, string Field)
{
ArrayList indexList
= new ArrayList
(); // 找出待删除的行索引
for (int i = 0; i < dt.Rows.Count - 1; i++)
{
if (!IsContain(indexList, i))
{
for (int j = i + 1; j < dt.Rows.Count; j++)
{
if (dt.Rows[i][Field].ToString() == dt.Rows[j][Field].ToString())
{
indexList.Add(j);
}
}
}
}
indexList.Sort();
// 排序
for (int i = indexList.Count - 1; i >= 0; i--)// 根据待删除索引列表删除行
{
int index = Convert.ToInt32(indexList[i]);
dt.Rows.RemoveAt(index);
}
return dt;
}
/// <summary>
/// 判断数组中是否存在
/// </summary>
/// <param name="indexList">数组</param>
/// <param name="index">索引</param>
/// <returns></returns>
public static bool IsContain(ArrayList indexList, int index)
{
for (int i = 0; i < indexList.Count; i++)
{
int tempIndex = Convert.ToInt32(indexList[i]);
if (tempIndex == index)
{
return true;
}
}
return false;
}
#endregion