如何在一行代码中向c#DataTable添加新行?

是的,您可以执行以下操作:

dt.Rows.Add("Sydney");

如果您是为了单元测试而这样做的,为什么不在某个静态类中或者更好的是在测试基类中使用helper方法呢?

例如

[TestClass]
public class TestBase
{
   protected void AddMockDataRow(DataTable dt)
   {
      DataRow dr = dt.NewRow();
      dr[0] = "Sydney"; // or you could generate some random string.
      dt.Rows.Add(dr);
   }
}

[TestClass]
public class SomeTest : TestBase
{
    [TestMethod]
    public void Ensure_Something_Meets_Some_Condition()
    {
       // Arrange.
       DataTable dt = new DataTable("results");

       // Act.
       AddMockDataRow(dt);

       // Assert.
       Assert.IsTrue(someCondition);
    }
}

这里的目标是使您的测试代码最小化,并减少冗余代码(不要枯燥)。

DataTable MakeDataTable(String name, String contents)
{
  DataTable dt = new DataTable(name);
  foreach (string val in contents.Split(","))
  {
    DataRow dr = dt.NewRow();
    dr[0] = val;
    dt.Rows.Add(dr);
  }
  return dt;
}

MakeDataTable("results","Sydney,Perth,Darwin");

DataTable dtStudent=新DataTable();

//Add new column
dtStudent.Columns.AddRange (
new DataColumn[] {
new DataColumn("SlNo", typeof(int)), 
new DataColumn("RollNumber", typeof(string)),
new DataColumn("DateOfJoin", typeof(DateTime)),
new DataColumn("Place", typeof(string)),
new DataColumn("Course", typeof(string)),
new DataColumn("Remark", typeof(string))
}
);
// Add value to the related column
dtStudent.Rows.Add(1, "10001", DateTime.Now, "Bhubaneswar", "MCA", "Good");

要快速创建包含一些数据的新数据表,可以在一行中完成所有操作:

DataTable testData = new DataTable( "TestData" ) {
    Columns = { "TestColumn1", "TestColumn2" },
    Rows = {
        { "Row1Col1Val", "Row1Col2Val"},
        { "Row2Col1Val", "Row2Col2Val"}
    }
};