数据表列重新排序 [英] DataTable column reorder

问题描述

我使用了一个数据表的内容

       column1    column2   column3  column4 column5 column6 column7 column8 column9 column10
row1   a           b         c         d       e       f       g      h       i        j

我想桌边reorderd为

I want the table to be reorderd as

        column4    column2    column1  column7 column6 column9 column10 column5 column8 column3
row1     d         b           a         g      f       i       j        e       h       c    

我尝试使用 DataTable.Column [I] .SetOrdinal（）方法，但它只是交换第一列正常。

I tried using the DataTable.Column[i].SetOrdinal() method but it swaps only the first column properly.

推荐答案

既然你还没有表现出完整的code这是很难说什么是其实是错误的。但是，这应该工作：

Since you haven't shown the full code it's difficult to say what's actually wrong. But this should work:

public static void ReorderTable(ref DataTable table, params String[] columns)
{
    if (columns.Length != table.Columns.Count)
        throw new ArgumentException("Count of columns must be equal to table.Column.Count", "columns");

    for (int i = 0; i < columns.Length; i++)
    {
        table.Columns[columns[i]].SetOrdinal(i);
    }
}

或 whatelse你$ P;

而不是一个 PARAMS的String [] 你也可以使用名单，其中的;的DataColumn＆GT $ PFER。

Instead of a params String[] you could also use a List<DataColumn> or whatelse you prefer.

测试你的样本数据：

var table = new DataTable();
table.Columns.Add("column1", typeof(string));
table.Columns.Add("column2", typeof(string));
table.Columns.Add("column3", typeof(string));
table.Columns.Add("column4", typeof(string));
table.Columns.Add("column5", typeof(string));
table.Columns.Add("column6", typeof(string));
table.Columns.Add("column7", typeof(string));
table.Columns.Add("column8", typeof(string));
table.Columns.Add("column9", typeof(string));
table.Columns.Add("column10", typeof(string));

for (int i = 0; i < 10; i++)
{
    table.Rows.Add("colum1", "column2", "colum3", "column4", "column5", "column6", "column7", "column8", "column9", "column10");
}

ReorderTable(ref table, "column4", "column2", "column1", "column7", "column6", "column9", "column10", "column5", "column8", "column3");

与.NET 2已经工作。

Works already with .NET 2.

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