将SQL Date时间格式转换为String

时间:2013-10-02 10:50:36

标签: c# asp.net sql-server

当读取SQl日期时间字段时,只有我可以将日期与时间相关...如何从Ajax或某种方法获取文本框中的日期。

这就是我需要做的事情

http://i.stack.imgur.com/n0fgG.jpg

这就是我把日期带到文本框的方式。

    protected void ddlBatch_SelectedIndexChanged(object sender, EventArgs e)
    {
        String strConnString = ConfigurationManager.ConnectionStrings["CBConnectionString"].ConnectionString;
        const String strQuery = "select ItemIdentityCode, Qty, PurchasingPrice, ExpireDate, DiscountRate, IssueMode,  Principle, Force from DEL_PurchasesLines where BatchNumber = @BatchNumber";
        SqlConnection conPR = new SqlConnection(strConnString);
        SqlCommand cmdPR = new SqlCommand();
        cmdPR.Parameters.AddWithValue("@BatchNumber", ddlBatch.SelectedItem.Value);
        cmdPR.CommandType = CommandType.Text;
        cmdPR.CommandText = strQuery;
        cmdPR.Connection = conPR;
        try
        {
            conPR.Open();
            SqlDataReader sdr = cmdPR.ExecuteReader();
            while (sdr.Read())
            {

                tHFExpiaryDate.Text = sdr["ExpireDate"].ToString();

            }
        }
        catch (Exception ex)
        {
            //throw ex;
        }

        finally
        {
            conPR.Close();
            conPR.Dispose();
        }
    }

3 个答案:

答案 0 :(得分:9)

首先不要将原始值转换为string - 它应该已经是DateTime:

DateTime date = (DateTime) dsr["ExpireDate"];

然后您可以将其转换为您感兴趣的任何格式:

// TODO: Consider specifying the culture too, or specify a standard pattern.
tHFExpiaryDate.Text = date.ToString("MM/d/yyyy");

将“如何以适当的类型从数据库中获取数据?”这一问题分开是很重要的。来自“我应该如何向用户提供数据?”

答案 1 :(得分:1)

尝试类似:

DateTime.ParseExact(sdr["ExpireDate"].ToString(), "MM/d/yyyy", CultureInfo.InvariantCulture)

在您的样本中:

tHFExpiaryDate.Text = DateTime.ParseExact( ((DateTime)dt.Rows[0][0]).ToString("MM/d/yyyy"), "MM/d/yyyy", System.Globalization.CultureInfo.CurrentCulture).ToString("MM/d/yyyy"));

答案 2 :(得分:0)

这总是对我有用

protected String getDate(string date)
{
    DateTime dDate;
    string sdate = null;
    if (!string.IsNullOrEmpty(date.ToString()))
    {
        dDate = DateTime.Parse(date.ToString());
        sdate = dDate.ToString("dd/MM/yyyy");
        sdate = dDate.ToLongDateString();
    }
    return sdate;
}

其他日期格式示例http://www.dotnetperls.com/datetime-format