如何使用datetime数据类型按列对数据表进行排序

Question

我所做的如下

dtClaim.DefaultView.Sort = "TransactionDate asc";
dtClaim = dtClaim.DefaultView.ToTable();
ViewState["dtClaim"] = dtClaim;

以下是应用排序之前数据表数据的屏幕截图

但是在使用上面的代码后，我无法使用“TransactionDate”

对数据进行排序

修改

这里我展示了我如何准备这个数据表

 DataTable dtClaim = new DataTable();
 dtClaim = (DataTable)ViewState["dtClaim"];

 DataRow drClaim = dtClaim.NewRow();
 drClaim["ClaimId"] = count + 1;
 drClaim["TextileClaimApplicationId"] = ViewState["TextileClaimApplicationId"].ToString();
 drClaim["BankId"] = ViewState["TextileClaimApplicationId"].ToString();
 drClaim["BankName"] = ViewState["TextileClaimApplicationId"].ToString();
 drClaim["SectorId"] = ViewState["TextileClaimApplicationId"].ToString();
 drClaim["IsDisbursment"] = rblIsDisbursment.SelectedValue;
 drClaim["TransactionDate"] = txtDisbursementDate.Text == "" ? Convert.ToDateTime(txtRepaymentDate.Text, System.Globalization.CultureInfo.GetCultureInfo("en-GB").DateTimeFormat) : Convert.ToDateTime(txtDisbursementDate.Text, System.Globalization.CultureInfo.GetCultureInfo("en-GB").DateTimeFormat);
 drClaim["DisbursementAmount"] = txtDisbursementAmount.Text == "" ? Convert.ToDecimal("0") : Convert.ToDecimal(txtDisbursementAmount.Text);
 drClaim["RepaymentPrincipleAmount"] = txtRepaymentPrincipleAmount.Text == "" ? Convert.ToDecimal("0") : Convert.ToDecimal(txtRepaymentPrincipleAmount.Text);
 drClaim["RepaymentOtherAmount"] = txtRepaymentOtherAmount.Text == "" ? Convert.ToDecimal("0") : Convert.ToDecimal(txtRepaymentOtherAmount.Text);
 dtClaim.Rows.Add(drClaim);



dtClaim.DefaultView.Sort = "TransactionDate";
dtClaim = dtClaim.DefaultView.ToTable();
ViewState["dtClaim"] = dtClaim;

Answer 1

为了让我的代码将DataTable值识别为DateTime，我必须在创建时设置我的行的数据类型。 （我使用这个DataTable作为我的GridView的数据源，并且很难对其进行排序。）

以前我有

DataTable dt = new DataTable();
dt.Columns.Add("ID");
dt.Columns.Add("StartDate");

我将此更改为

dt.Columns.Add("StartDate", typeof(DateTime));

在我设置列类型之前，将我插入该列的类型更改为DateTime不起作用。

https://msdn.microsoft.com/en-us/library/hfx3s9wd(v=vs.110).aspx