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如何動態創建日曆？

2012-08-27 64 views
0

我想創建一個日曆控件動態，我想添加需要顯示在文本框中選定的日期。如何動態創建日曆？

我需要在代碼中動態執行所有操作。我與這裏的代碼嘗試它：創建

cell1.Controls.Add(new Label() { 
         ID = "Label" + childnodecount, 
         Text = controllabel, 
         ForeColor = System.Drawing.Color.Blue 
        }); 
cell2.Controls.Add(new Calendar() { ID = "Calendar" + childnodecount }); 
cell2.Controls.Add(new TextBox() { ID = "CalendarTextBox" + childnodecount }); 
row.Cells.Add(cell1); 
row.Cells.Add(cell2); 
dynamictable.Rows.Add(row); 
SearchParameter = SearchParameter + controllabel + "=" 
       + Request.Form["TextBox" + childnodecount] + "|";

日曆，但是當我選擇任何日期，所有創建的控件從頁面消失。

來源

2012-08-27 user1428019

回答

1

把你的代碼放在Page_Init或Page_Load事件中。

public void page_load() 
{ 
    //code to create objects and add them to Controls collection 
}

來源

2012-08-27 07:19:38 adatapost

0

使用Page_Load事件，並以適當的方式管理IsPostBack屬性。

protected void Page_Load(object sender, EventArgs e) 
{ 
    if(IsPostBack) 
    { 

    } 
}

來源

2012-08-27 07:25:54

0

我在c＃中爲此代碼創建了動態日曆。我認爲這段代碼對你來說很舒服。

public partial class日曆：System.Web.UI.Page string [] Month = new string [] {「Jan」，「Feb」，「Mar」，「Apr」，「May」，「君」， 「月」， 「月」， 「月」， 「月」， 「月」， 「月」}; HtmlTableRow tr; HtmlTableCell tc; Button btn; Label lbl;

protected void Page_Load(object sender, EventArgs e) 
    { 
     foreach (Control control in ph1.Controls) 
     { 
      ph1.Controls.Remove(control); 
     } 

     if (!Page.IsPostBack) 
     { 
      Session["Calander"] = null; 
      var dt = new DateTime(System.DateTime.Now.Year, System.DateTime.Now.Month, 01); 
      var dttable = new DataTable(); 
      dttable.Columns.Add("type", typeof (string)); 
      dttable.Columns.Add("value", typeof (DateTime)); 
      var dr = dttable.NewRow(); 
      dr["type"] = "M-Y"; 
      dr["value"] = dt; 
      dttable.Rows.Add(dr); 

      GenerateTable(dttable); 

      for (int i = 1; i < 32; i++) 
      { 
       ddlday.Items.Add(new ListItem(i.ToString(CultureInfo.InvariantCulture),i.ToString(CultureInfo.InvariantCulture))); 
      } 
      ddlmonth.DataSource = Month; 
      ddlmonth.DataBind(); 
     } 
     for (int i = 1900; i < DateTime.Now.Year; i++) 
     { 
      ddlyear.Items.Add(new ListItem(i.ToString(CultureInfo.InvariantCulture), i.ToString(CultureInfo.InvariantCulture))); 
     } 
     if (Session["Calander"] != null) 
     { 
      var dtSession = (DataTable) Session["Calander"]; 
      GenerateTable(dtSession); 
     } 
    } 

    private void GenerateTable(DataTable dtSession) 
    { 
     foreach (Control c in ph1.Controls) 
     { 
      ph1.Controls.Remove(c); 
     } 

     var datesession = new DateTime(); 
     if (dtSession.Rows.Count > 0) 
     { 
      datesession = Convert.ToDateTime(dtSession.Rows[0]["value"]); 
     } 
     var count = 0; 

     var tb1 = new HtmlTable(); 
     tb1.Style.Add(HtmlTextWriterStyle.BorderWidth,"1px"); 
     tb1.Style.Add(HtmlTextWriterStyle.BorderStyle, "solid"); 
     tb1.Style.Add(HtmlTextWriterStyle.BorderColor, "black"); 

     tr = new HtmlTableRow(); 
     tb1.Rows.Add(tr); 

     tc = new HtmlTableCell(); 
     tc.Style.Add(HtmlTextWriterStyle.BorderWidth,"1px"); 
     tc.Style.Add(HtmlTextWriterStyle.BorderStyle, "solid"); 
     tc.Style.Add(HtmlTextWriterStyle.BorderColor, "black"); 
     tc.Style.Add(HtmlTextWriterStyle.TextAlign, "left"); 
     tr.Cells.Add(tc); 

     btn = new Button(); 
     btn.Style.Add(HtmlTextWriterStyle.TextAlign,"left"); 
     btn.ID = "btnmonpre"; 
     btn.Text = "<<"; 
     btn.Click += new EventHandler(btnmonpre_Click); 
     tc.Controls.Add(btn); 

     tc = new HtmlTableCell(); 
     tc.Style.Add(HtmlTextWriterStyle.BorderWidth, "1px"); 
     tc.Style.Add(HtmlTextWriterStyle.BorderStyle, "solid"); 
     tc.Style.Add(HtmlTextWriterStyle.BorderColor, "black"); 
     tc.Style.Add(HtmlTextWriterStyle.TextAlign, "center"); 
     if (dtSession.Rows[0]["type"].ToString() == "M-Y") 
     { 
      tc.ColSpan = 5; 
     } 
     tr.Cells.Add(tc); 

     btn = new Button(); 
     btn.ID = "btnmonyear"; 

     if (Convert.ToString(dtSession.Rows[0]["type"]) == "M-Y") 
     { 
      btn.Text = Month[datesession.Month - 1] + "-" + datesession.Year.ToString(CultureInfo.InvariantCulture); 
     } 

     tc.Controls.Add(btn); 
     btn.Click += new EventHandler(BtnMonYear_clicl); 

     tc = new HtmlTableCell(); 
     tc.Style.Add(HtmlTextWriterStyle.BorderWidth, "1px"); 
     tc.Style.Add(HtmlTextWriterStyle.BorderStyle, "solid"); 
     tc.Style.Add(HtmlTextWriterStyle.BorderColor, "black"); 
     tc.Style.Add(HtmlTextWriterStyle.TextAlign, "right"); 
     tr.Cells.Add(tc); 

     btn = new Button(); 
     btn.Style.Add(HtmlTextWriterStyle.TextAlign, "right"); 
     btn.ID = "btnmonnext"; 
     btn.Text = ">>"; 
     btn.Click += new EventHandler(btnmonnext_Click); 
     tc.Controls.Add(btn); 

     if (dtSession.Rows[0]["type"].ToString() == "M-Y") 
     { 
      int startPoint = 0, endPoint = 0, DatePlaceCount = 0; 
      var firstDate = new DateTime(datesession.Year,datesession.Month,01); 
      startPoint = (int) firstDate.DayOfWeek; 

      if (startPoint == 0) 
      { 
       startPoint = 7; 
      } 
      endPoint = firstDate.AddMonths(1).AddDays(-1).Day; 

      int previousDays = firstDate.AddDays(-1).Day; 
      int pDatePlace = previousDays - (startPoint - 2); 
      int nDatePlace = 1; 

      tr = new HtmlTableRow(); 
      tb1.Rows.Add(tr); 

      tc = new HtmlTableCell(); 
      tc.Style.Add(HtmlTextWriterStyle.BorderWidth, "1px"); 
      tc.Style.Add(HtmlTextWriterStyle.BorderStyle, "solid"); 
      tc.Style.Add(HtmlTextWriterStyle.BorderColor, "black"); 
      tc.Style.Add(HtmlTextWriterStyle.Width, "60px"); 
      tc.Style.Add(HtmlTextWriterStyle.TextAlign, "center"); 
      tr.Cells.Add(tc); 

      lbl = new Label(); 
      lbl.ID = "day1"; 
      lbl.Text = "Mon"; 
      tc.Controls.Add(lbl); 

      tc = new HtmlTableCell(); 
      tc.Style.Add(HtmlTextWriterStyle.BorderWidth, "1px"); 
      tc.Style.Add(HtmlTextWriterStyle.BorderStyle, "solid"); 
      tc.Style.Add(HtmlTextWriterStyle.BorderColor, "black"); 
      tc.Style.Add(HtmlTextWriterStyle.Width, "60px"); 
      tc.Style.Add(HtmlTextWriterStyle.TextAlign, "center"); 
      tr.Cells.Add(tc); 

      lbl = new Label(); 
      lbl.ID = "day2"; 
      lbl.Text = "Tue"; 
      tc.Controls.Add(lbl); 

      tc = new HtmlTableCell(); 
      tc.Style.Add(HtmlTextWriterStyle.BorderWidth, "1px"); 
      tc.Style.Add(HtmlTextWriterStyle.BorderStyle, "solid"); 
      tc.Style.Add(HtmlTextWriterStyle.BorderColor, "black"); 
      tc.Style.Add(HtmlTextWriterStyle.Width, "60px"); 
      tc.Style.Add(HtmlTextWriterStyle.TextAlign, "center"); 
      tr.Cells.Add(tc); 

      lbl = new Label(); 
      lbl.ID = "day3"; 
      lbl.Text = "Wed"; 
      tc.Controls.Add(lbl); 

      tc = new HtmlTableCell(); 
      tc.Style.Add(HtmlTextWriterStyle.BorderWidth, "1px"); 
      tc.Style.Add(HtmlTextWriterStyle.BorderStyle, "solid"); 
      tc.Style.Add(HtmlTextWriterStyle.BorderColor, "black"); 
      tc.Style.Add(HtmlTextWriterStyle.Width, "60px"); 
      tc.Style.Add(HtmlTextWriterStyle.TextAlign, "center"); 
      tr.Cells.Add(tc); 

      lbl = new Label(); 
      lbl.ID = "day4"; 
      lbl.Text = "Thu"; 
      tc.Controls.Add(lbl); 

      tc = new HtmlTableCell(); 
      tc.Style.Add(HtmlTextWriterStyle.BorderWidth, "1px"); 
      tc.Style.Add(HtmlTextWriterStyle.BorderStyle, "solid"); 
      tc.Style.Add(HtmlTextWriterStyle.BorderColor, "black"); 
      tc.Style.Add(HtmlTextWriterStyle.Width, "60px"); 
      tc.Style.Add(HtmlTextWriterStyle.TextAlign, "center"); 
      tr.Cells.Add(tc); 

      lbl = new Label(); 
      lbl.ID = "day5"; 
      lbl.Text = "Fri"; 
      tc.Controls.Add(lbl); 

      tc = new HtmlTableCell(); 
      tc.Style.Add(HtmlTextWriterStyle.BorderWidth, "1px"); 
      tc.Style.Add(HtmlTextWriterStyle.BorderStyle, "solid"); 
      tc.Style.Add(HtmlTextWriterStyle.BorderColor, "black"); 
      tc.Style.Add(HtmlTextWriterStyle.Width, "60px"); 
      tc.Style.Add(HtmlTextWriterStyle.TextAlign, "center"); 
      tr.Cells.Add(tc); 

      lbl = new Label(); 
      lbl.ID = "day6"; 
      lbl.Text = "Sat"; 
      tc.Controls.Add(lbl); 

      tc = new HtmlTableCell(); 
      tc.Style.Add(HtmlTextWriterStyle.BorderWidth, "1px"); 
      tc.Style.Add(HtmlTextWriterStyle.BorderStyle, "solid"); 
      tc.Style.Add(HtmlTextWriterStyle.BorderColor, "black"); 
      tc.Style.Add(HtmlTextWriterStyle.Width, "60px"); 
      tc.Style.Add(HtmlTextWriterStyle.TextAlign, "center"); 
      tr.Cells.Add(tc); 

      lbl = new Label(); 
      lbl.ID = "day7"; 
      lbl.Text = "Sun"; 
      tc.Controls.Add(lbl); 

      tb1.Rows.Add(tr); 

      for (int i = 0; i < 6; i++) 
      { 
       tr = new HtmlTableRow(); 
       tb1.Rows.Add(tr); 

       for (int j = 1; j < 8; j++) 
       { 
        tc = new HtmlTableCell(); 
        tc.Style.Add(HtmlTextWriterStyle.BorderWidth,"1px"); 
        tc.Style.Add(HtmlTextWriterStyle.BorderStyle, "solid"); 
        tc.Style.Add(HtmlTextWriterStyle.BorderColor, "black"); 
        tc.Style.Add(HtmlTextWriterStyle.Width, "60px"); 
        tc.Style.Add(HtmlTextWriterStyle.TextAlign, "center"); 
        tr.Cells.Add(tc); 
        count++; 

        if (count >= startPoint && count < startPoint + endPoint) // current month dateplace 
        { 
         DatePlaceCount++; 
         btn = new Button(); 
         btn.Text = DatePlaceCount.ToString(); 
         btn.ID = btn + count.ToString(); 
         btn.EnableViewState = false; 
         btn.Click += new EventHandler(btnClick); 
         tc.Controls.Add(btn); 
        } 
        else 
        { 
         if (count < startPoint) // Previous month 
         { 
          btn = new Button(); 
          btn.Text = pDatePlace.ToString(); 
          btn.Style.Add(HtmlTextWriterStyle.BackgroundColor, "Red"); 
          btn.ID = btn + count.ToString(); 
          btn.ValidationGroup = "Prev"; 
          btn.EnableViewState = false; 
          btn.Click += new EventHandler(btnClick); 
          tc.Controls.Add(btn); 
          pDatePlace++; 
         } 
         else if (count >= startPoint + endPoint) // Next month 
         { 
          btn = new Button(); 
          btn.Text = nDatePlace.ToString(); 
          btn.Style.Add(HtmlTextWriterStyle.BackgroundColor, "Blue"); 
          btn.ID = btn + count.ToString(); 
          btn.ValidationGroup = "Next"; 
          btn.EnableViewState = false; 
          btn.Click += new EventHandler(btnClick); 
          tc.Controls.Add(btn); 
          nDatePlace++; 
         } 
        } 
       } 
      } 
      ph1.Controls.Add(tb1); 
      Session["Calander"] = null; 
      dtSession.Rows.Clear(); 
      DataRow dr = dtSession.NewRow(); 
      dr["type"] = "M-Y"; 
      dr["value"] = new DateTime(firstDate.Year, firstDate.Month, firstDate.Day); 
      dtSession.Rows.Add(dr); 
      Session["Calander"] = dtSession; 
     } 
    } 

    protected void btnsearch_Click(object sender, EventArgs e) 
    { 
     var dt = new DateTime(); 
     //var dt1 = DateTime.TryParse(ddlyear.SelectedValue.ToString(CultureInfo.InvariantCulture) + "/" + Array.IndexOf(Month, ddlmonth.SelectedValue.ToString(CultureInfo.InvariantCulture)) + 1.ToString(CultureInfo.InvariantCulture) + "/" + ddlday.SelectedValue.ToString(CultureInfo.InvariantCulture), out dt); 
     var year = ddlyear.SelectedValue.ToString(CultureInfo.InvariantCulture); 
     var month = Convert.ToInt32(Array.IndexOf(Month, ddlmonth.SelectedValue.ToString(CultureInfo.InvariantCulture))) + 1; 
     var date = ddlday.SelectedValue.ToString(CultureInfo.InvariantCulture); 

     var dt1 = DateTime.Parse(month + "/" + date + "/" + year); 
     if (dt1 != DateTime.MinValue) 
     { 
      if (Session["Calander"] != null) 
      { 
       Session["Calander"] = null; 
       // DateTime dt1 = new DateTime(Convert.ToInt32(ddlyear.SelectedValue.ToString(CultureInfo.InvariantCulture)), Convert.ToInt32(ddlmonth.SelectedValue.ToString(CultureInfo.InvariantCulture)), Convert.ToInt32(ddlday.SelectedValue.ToString(CultureInfo.InvariantCulture))); 
       DataTable dtTable = new DataTable(); 
       dtTable.Columns.Add("type", typeof(string)); 
       dtTable.Columns.Add("value", typeof(DateTime)); 
       DataRow dr = dtTable.NewRow(); 
       dr["type"] = "M-Y"; 
       dr["value"] = dt1; 
       dtTable.Rows.Add(dr); 
       GenerateTable(dtTable); 
       Response.Write(" U R Selecting Date:" + dt1.ToString("dd/MMM/yyyy")); 

       // var dtSession = (DataTable)Session["Calander"]; 
       // GenerateTable(dtSession); 


      } 
     } 
    } 

    protected void btnmonpre_Click(object sender, EventArgs e) 
    { 
     DataTable dtsession = (DataTable)Session["Calander"]; 
     DateTime datesession = Convert.ToDateTime(dtsession.Rows[0]["value"]); 

     if (Convert.ToString(dtsession.Rows[0]["type"]) == "M-Y") 
     { 
      if (datesession.AddMonths(-1).Year >= 1970) 
      { 
       dtsession.Rows[0]["value"] = datesession.AddMonths(-1); 
      } 
      Session["Calander"] = dtsession; 
      GenerateTable(dtsession); 
     } 
    } 

    protected void btnmonnext_Click(object sender, EventArgs e) 
    { 
     DataTable dtsession = (DataTable)Session["Calander"]; 
     DateTime datesession = Convert.ToDateTime(dtsession.Rows[0]["value"]); 

     if (Convert.ToString(dtsession.Rows[0]["type"]) == "M-Y") 
     { 
      if (datesession.AddMonths(1).Year <= 2070) 
      { 
       dtsession.Rows[0]["value"] = datesession.AddMonths(1); 
      } 
      Session["Calander"] = dtsession; 
      GenerateTable(dtsession); 
     } 
    } 

    protected void BtnMonYear_clicl(object sender, EventArgs e) 
    { 
     DataTable dtSession = (DataTable)Session["Calander"]; 
     DateTime datesession = (DateTime)dtSession.Rows[0]["value"]; 
     if (dtSession.Rows[0]["type"].ToString() == "M-Y") 
     { 
      dtSession.Clear(); 
      DataRow dr = dtSession.NewRow(); 
      dr["type"] = "M-Y"; 
      dr["value"] = datesession; 
      dtSession.Rows.Add(dr); 
      Session["Calander"] = dtSession; 
      GenerateTable(dtSession); 
     } 
    } 

    protected void btnClick(object sender, EventArgs e) 
    { 
     DataTable dtsession = (DataTable)Session["Calander"]; 
     Button b = (Button)sender; 
     DateTime ResultDate; 
     DateTime dt; 
     if (Convert.ToString(dtsession.Rows[0]["type"]) == "M-Y") 
     { 
      if (b.ValidationGroup == "Prev") 
      { 
       dt = (DateTime)(dtsession.Rows[0]["value"]); 
       dt = dt.AddMonths(-1); 
       ResultDate = new DateTime(dt.Year, dt.Month, Convert.ToInt32(b.Text)); 
       b.Style.Add(HtmlTextWriterStyle.BackgroundColor, "Green"); 
       Response.Write("U R Selecting Date:" + ResultDate.ToString("dd/MMM/yyyy")); 
      } 
      else if (b.ValidationGroup == "Next") 
      { 
       dt = (DateTime)(dtsession.Rows[0]["value"]); 
       dt = dt.AddMonths(1); 
       ResultDate = new DateTime(dt.Year, dt.Month, Convert.ToInt32(b.Text)); 
       b.Style.Add(HtmlTextWriterStyle.BackgroundColor, "Green"); 
       Response.Write(" U R Selecting Date:" + ResultDate.ToString("dd/MMM/yyyy")); 
      } 
      else 
      { 
       dt = (DateTime)(dtsession.Rows[0]["value"]); 
       ResultDate = new DateTime(dt.Year, dt.Month, Convert.ToInt32(b.Text)); 
       b.Style.Add(HtmlTextWriterStyle.BackgroundColor, "Green"); 
       Response.Write(" U R Selecting Date:" + ResultDate.ToString("dd/MMM/yyyy")); 
      } 
     } 
    } 
}

來源

2017-02-23 09:30:06

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