使用C#按多列对数据表进行排序

Question

我有一个名为列的DataTable foldername,documentname.数据如下:

FolderName  DocumentName
Folder1     HR[D] Document
Folder1     ___----'
Folder1     Asp_example.pdf
Folder2     SD
Folder3     Heavy_weight
Folder3     Accesorial Services

如何alphabetically基于FolderName对DocumentName 进行排序.Net Framework 2.0.

我们尝试的解决方案如下,但由于它包含超过1200000条记录,因此需要花费太多时间.

int counter=0;

while (counter < searchDT.Rows.Count){
   string FolderName = Convert.ToString(searchDT.Rows[counter]["Folder Name"]);

   string exp = "[Folder Name] like '" + FolderName + "'";

   if (FolderName.Contains("%") || FolderName.Contains("_") || FolderName.Contains("[]") ||      FolderName.Contains("'"))

      exp = "[Folder Name] like '" + EscapeLikeValue(FolderName) + "'";

   string sortExpression = "[Document Name] ASC";

   DataRow[] drfoldername = searchDT.Select(exp, sortExpression);

   foreach (DataRow row in drfoldername)
     drfoldernameDT.ImportRow(row);

   counter += drfoldername.Length;

 }

Answer 1

DataTable dt = new DataTable();

DataView dv = new DataView(dt);
dv.Sort = "FolderName, DocumentName ASC";

试试吧.它将首先对FolderName进行排序,然后对DocumentName进行排序.

如果您需要将其发送到屏幕中的组件,您可以像使用DataTable一样.

Answer 2

您尝试过 DataView.Sort 吗？

dt.DefaultView.RowFilter = "FolderName , DocumentName ASC";
dt = dt.DefaultView.ToTable();