对ADO.NET数据表进行排序

Question

I have a datatable in C#.

DataTable dtClientMedications = new DataTable();
dtClientMedications.Columns.Add("Id");
dtClientMedications.Columns.Add("MedId");
dtClientMedications.Columns.Add("BrandName");
dtClientMedications.Columns.Add("GenericName");
dtClientMedications.Columns.Add("Type");
dtClientMedications.Columns.Add("Dosage");
dtClientMedications.Columns.Add("Status");
dtClientMedications.Columns.Add("SortOrder");

I want to sort in by the column SortOrder & assign it to a gridview. I used this:

gdvMainList.DataSource = dtClientMedications.DefaultView.Sort[7];//dtClientMedications;
gdvMainList.DataBind();

But it gives index out of bound exception.

Answer 1

You are missing what the Sort property is in fact.

It is the expression that you want to sort. A string value, not index of columns. Your code tries to read the 6th char in an assumed existing sort string , no more!

Use

dtClientMedications.DefaultView.Sort = "SortOrder";

Before data binding.

gdvMainList.DataSource = dtClientMedications.DefaultView; // You may not need to mention view
gdvMainList.DataBind();

.

Documentation: http://msdn.microsoft.com/en-us/library/system.data.dataview.sort.aspx

Answer 2

Sort is string property.

Use,

dtClientMedications.DefaultView.Sort="ID"

Answer 3

您可以对表本身中的列进行排序：

dtClientMedications.Columns["SortOrder"].SetOrdinal(0);