WPF知识点

public DataTable ListToDt<T>(IEnumerable<T> collection)

{

  var props = typeof(T).GetProperties();

  var dt = new DataTable();

  dt.Columns.AddRange(props.Select(p => new

  DataColumn(p.Name, p.PropertyType)).ToArray());

  if (collection.Count() > 0)

  {

    for (int i = 0; i < collection.Count(); i++)

    {

      ArrayList tempList = new ArrayList();

      foreach (PropertyInfo pi in props)

      {

        object obj = pi.GetValue(collection.ElementAt(i), null);

        tempList.Add(obj);

      }

      object[] array = tempList.ToArray();

      dt.LoadDataRow(array, true);

    }

  }

  return dt;

}

public List<Teacher> list = new List<Teacher>();

public class Teacher

{

    public string Name { get; set; }

    public string Password { get; set; }

}

DataTable dt = ListToDt(list);

DataView dv = new DataView(dt);

private DataTable SwapTable(DataTable tableData)

{

  int intRows = tableData.Rows.Count;

  int intColumns = tableData.Columns.Count;

  // 转二维数组

  string[,] arrayData = new string[intRows, intColumns];

  for (int i = 0; i < intRows; i++)

  {

    for (int j = 0; j < intColumns; j++)

    {

      arrayData[i, j] = tableData.Rows[i][j].ToString();

    }

  }

  // 下标对换

  string[,] arrSwap = new string[intColumns, intRows];

  for (int m = 0; m < intColumns; m++)

  {

    for (int n = 0; n < intRows; n++)

    {

      arrSwap[m, n] = arrayData[n, m];

    }

  }

  DataTable dt = new DataTable();

  // 添加列

  for (int k = 0; k < intRows; k++)

  {

    dt.Columns.Add(new DataColumn(arrSwap[0, k]));

  }

  // 添加行

  for (int r = 1; r < intColumns; r++)

  {

    DataRow dr = dt.NewRow();

    for (int c = 0; c < intRows; c++)

    {

      dr[c] = arrSwap[r, c].ToString();

    }

    dt.Rows.Add(dr);

  }

  // 添加行头

  DataColumn ColRowHead = new DataColumn(tableData.Columns[0].ColumnName);

  dt.Columns.Add(ColRowHead);

  dt.Columns[ColRowHead.ColumnName].SetOrdinal(0);

  for (int i = 0; i < intColumns - 1; i++)

  {

    dt.Rows[i][ColRowHead.ColumnName] = tableData.Columns[i + 1].ColumnName;

  }

  return dt;

}

/// <summary>

/// 选中事件

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void dataGrid_SelectedCellsChanged(object sender, SelectedCellsChangedEventArgs e)

{

  DataRowView mySelectedItem = (DataRowView)dataGrid.SelectedItem;

  // 判断有没有选中

  if (mySelectedItem != null)

  {

    DataRow result = mySelectedItem.Row;

    DataTable dataTableNew = dataTable.Clone();

    dataTableNew.ImportRow(result);

    this.dataGrid1.ItemsSource = new DataView(dataTableNew);

  }

}

DataRow[] dr = dataTable.Select("Name ='张三'", "Time DESC");

DataTable dataTableNew = dataTable.Clone();

for (int i = 0; i < dr.Length; i++)

{

  dataTableNew.ImportRow(dr[i]);

}

this.dataGrid1.ItemsSource = new DataView(dataTableNew);

Text="{Binding SearchText,UpdateSourceTrigger=PropertyChanged}"