ASP.net 日历绑定

Question

我正在尝试设置从 SQL table 中选择的日历日期。只是将 table 中的日期显示到 Calendar 上。我的问题在最后一行。

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        Calendar2.SelectedDate = DateTime.Now;
        SVCID = (string)(Session["SVCID"]);
        CustID = (string)(Session["CUSTID"]);
        int SVC_ID = System.Convert.ToInt32(SVCID);
        int Cust_ID = System.Convert.ToInt32(CustID);
        DataTable dt = new DataTable();
        string constr = ConfigurationManager.ConnectionStrings["lg_db"].ConnectionString;
        using (SqlConnection con = new SqlConnection(constr))
        {
            using (SqlCommand cmd = new SqlCommand("Select * From Customers where Cust_ID = @CID", con))
            {
                SqlDataAdapter sqlDa = new SqlDataAdapter(cmd);
                cmd.Parameters.AddWithValue("@CID", CustID);
                sqlDa.Fill(dt);
                if (dt.Rows.Count > 0)
                {
                    TB_Cname.Text = dt.Rows[0]["Cust_Name"].ToString();
                    TB_Cphone.Text = dt.Rows[0]["Cust_phone"].ToString();
                    TB_Cmobile.Text = dt.Rows[0]["Cust_Mobile"].ToString();
                    TB_Cadd.Text = dt.Rows[0]["Cust_Add"].ToString();
                    DDL_PType.DataTextField = dt.Rows[0]["Cust_City"].ToString();
                    DDL_City.DataTextField = dt.Rows[0]["Cust_City"].ToString();
                    con.Close();
                }
                using (SqlCommand cmd2 = new SqlCommand("Select * From SVC where SVC_ID = @SID", con))
                {
                    SqlDataAdapter sqlDa2 = new SqlDataAdapter(cmd);
                    cmd2.Parameters.AddWithValue("@SID", SVC_ID);
                    sqlDa2.Fill(dt);
                    if (dt.Rows.Count > 0)
                    {
                        DDL_PType.DataTextField = dt.Rows[0]["Product_type_ID"].ToString();
                        DDL_Model.DataTextField = dt.Rows[0]["Product_ID"].ToString();
                        TB_serial.Text = dt.Rows[0]["SerialNumber"].ToString();
                        TB_Symptom.Text = dt.Rows[0]["Symptom"].ToString();
                        Calendar2.SelectedDate = dt.Rows[0]["Symptom"].ToString();
                    }
                }
            }

        }
    }
}

此代码显示错误：

"Cannot convert Type string to datetime"

谢谢

Answer 1

试试这个

Calendar2.SelectedDate = DateTime.Parse(dt.Rows[0]["Symptom"].ToString());

我猜你在这里使用了错误的字段，这是一个拼写错误：

dt.Rows[0]["Symptom"].ToString() 我认为不是 Symptom 字段你想设置一个 SelectedDate.

Answer 2

使用Calendar2.SelectedDate = DateTime.Now.ToString();

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