In the Page_Load event I would like to have the current week selected on the calendar instead of just the current day. How can this be done?
<asp:Calendar
ID="Calendar1"
runat="server"
ondayrender="Calendar1_DayRender"
SelectionMode="DayWeek"
onselectionchanged="Calendar1_SelectionChanged">
</asp:Calendar>
protected void Page_Load(object sender, EventArgs e)
{
Calendar1.SelectedDate = System.DateTime.Today;
}
protected void Calendar1_DayRender(object sender, DayRenderEventArgs e)
{
e.Day.IsSelectable = false;
}
Give this a try:
Calendar1.SelectionMode = CalendarSelectionMode.DayWeek;
ArrayList selectedDates = new ArrayList();
DateTime today = DateTime.Now;
DateTime firstDay = today.AddDays(-(double)(today.DayOfWeek));
for (int loop = 0; loop < 7; loop++)
Calendar1.SelectedDates.Add(firstDay.AddDays(loop));
Related
So I have a sipme ASP.NET Web Page that prints the info of one's gender stacked dynamically in a radio button list:
protected void Page_Load(object sender, EventArgs e)
{
String[] genders = new String[2];
genders[0] = "Male";
genders[1] = "Female";
RadioButtonList1.DataSource = genders;
RadioButtonList1.DataBind();
RadioButtonList1.Items.Add(new ListItem("Neutral", "Zero"));
}
protected void Button1_Click(object sender, EventArgs e)
{
lblName.Text = txtName.Text;
lblSurname.Text = txtSurname.Text;
lblEmail.Text = txtMail.Text;
Panel1.Visible = true;
if (RadioButtonList1.SelectedIndex==0) lblGender.Text = "Male";
else lblGender.Text = "Female";
}
However when I launch the site no matter what I select it always writes female it's like the RadioButtonList1.SelectedIndex==0 isn't working.
Any ideas?
Bind radiobuttonlist in page_Load with !IsPostBack condition or your radiobuttonlist will bind every time you post your page. So your radiobuttonlist is reset to index -1 when you click the button_click.
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
String[] genders = new String[2];
genders[0] = "Male";
genders[1] = "Female";
RadioButtonList1.DataSource = genders;
RadioButtonList1.DataBind();
RadioButtonList1.Items.Add(new ListItem("Neutral", "Zero"));
}
}
I have been working on a project and I got stuck with a problem i.e I am able to select first and last date using asp.net calendar control but i want it to be done with calendar extender
the code shown as below is for calender control ..please provide me the solution for calendar extender with required modification..............
protected void Calendar1_SelectionChanged(object sender, EventArgs e)
{
Calendar1.SelectionMode = CalendarSelectionMode.DayWeek;
//ArrayList selectedDates = new ArrayList();
string s = Calendar1.SelectedDate.ToShortDateString();
DateTime today = DateTime.Parse(s);
DateTime firstDay = today.AddDays(-(double)(today.DayOfWeek));
DateTime lastDay = today.AddDays(6 - (double)(today.DayOfWeek));
for (int loop = 0; loop < 7; loop++)
Calendar1.SelectedDates.Add(firstDay.AddDays(loop));
lblStartOfWeek.Text = firstDay.ToLongDateString();
lblEndOfWeek.Text = lastDay.ToLongDateString();
lblStartOfWeek.Visible = true;
lblEndOfWeek.Visible = true;
checkLessonPlan();
}
protected void Calendar1_ontextchanged(object sender, EventArgs e)
{
string numberofdays= Convert.ToDateTime(this.TextBox1.Text).DayOfWeek.ToString("d");
DateTime select = Convert.ToDateTime(TextBox1.Text);
lblStartOfWeek.Text = select.AddDays(-Convert.ToInt32(numberofdays)).ToString("dd MMMM yyyy");
lblEndOfWeek.Text = select.AddDays(6-Convert.ToInt32(numberofdays)).ToString("dd MMMM yyyy");
}
I am using GridView in asp.net. I want to select a single data row. I looked for MultiSelect and SelectionMode in property panel, but I can't find it.
So how to enable selecting rows in GridView?
Thanks.
Code Behind
public partial class SearchCourse : System.Web.UI.Page
{
Connection dbCon;
DataTable tbl;
protected void Page_Load(object sender, EventArgs e)
{
dbCon = new Connection();
}
protected void RadioButton1_CheckedChanged(object sender, EventArgs e)
{
if (RadioButton1.Checked) {
txtSubName.Enabled = true;
comboSemester.Enabled = false;
comboYear.Enabled = false;
comboProgram.Enabled =false;
txtSubName.Text = "";
}
}
protected void RadioButton2_CheckedChanged(object sender, EventArgs e)
{
if (RadioButton2.Checked) {
comboProgram.Enabled = true;
if (comboProgram.SelectedItem.ToString() == "Foundation Course")
{
comboSemester.Enabled = false;
comboYear.Enabled = false;
}
else {
comboSemester.Enabled = true;
comboYear.Enabled = true;
}
txtSubName.Text = "";
txtSubName.Enabled = false;
}
}
protected void imgBtnSearch_Click(object sender, ImageClickEventArgs e)
{
if (RadioButton1.Checked) {
String name = txtSubName.Text;
tbl = dbCon.getResultsBySubjectName(name);
GridView1.DataSource = tbl;
GridView1.DataBind();
}
else if (RadioButton2.Checked)
{
String program = comboProgram.SelectedItem.ToString();
String year = comboYear.SelectedItem.ToString();
String sem= comboSemester.SelectedItem.ToString();
tbl = dbCon.getResultsByProgram(program,year,sem);
GridView1.DataSource = tbl;
GridView1.DataBind();
}
else if (RadioButton3.Checked)
{
String name = txtSubName.Text;
tbl = dbCon.getResultsBySubjectNo(name);
GridView1.DataSource = tbl;
GridView1.DataBind();
}
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
String program = comboProgram.SelectedItem.ToString();
String year, sem;
if (program == "Foundation Course")
{
comboYear.Enabled = false;
comboSemester.Enabled = false;
year = null;
sem = null;
}
else {
comboYear.Enabled = true;
comboSemester.Enabled = true;
year = comboYear.SelectedItem.ToString();
sem = comboSemester.SelectedItem.ToString();
}
tbl = dbCon.getResultsByProgram(program, year, sem);
GridView1.DataSource = tbl;
GridView1.DataBind();
}
protected void comboYear_SelectedIndexChanged(object sender, EventArgs e)
{
String program = comboProgram.SelectedItem.ToString();
String year = comboYear.SelectedItem.ToString();
String sem = comboSemester.SelectedItem.ToString();
tbl = dbCon.getResultsByProgram(program, year, sem);
GridView1.DataSource = tbl;
GridView1.DataBind();
}
protected void comboSemester_SelectedIndexChanged(object sender, EventArgs e)
{
String program = comboProgram.SelectedItem.ToString();
String year = comboYear.SelectedItem.ToString();
String sem = comboSemester.SelectedItem.ToString();
tbl = dbCon.getResultsByProgram(program, year, sem);
GridView1.DataSource = tbl;
GridView1.DataBind();
}
protected void RadioButton3_CheckedChanged(object sender, EventArgs e)
{
if (RadioButton3.Checked)
{
txtSubName.Enabled = true;
comboSemester.Enabled = false;
comboYear.Enabled = false;
comboProgram.Enabled = false;
txtSubName.Text = "";
}
}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
}
}
GridView Code
<asp:GridView ID="GridView1" CssClass="grid" runat="server" AllowPaging="True"
BorderColor="Black" BorderStyle="Solid" BorderWidth="2px"
GridLines="Horizontal" EnableViewState="False"
PageSize="5" onselectedindexchanged="GridView1_SelectedIndexChanged" >
<RowStyle CssClass="gridRow" Width="800px" />
<SelectedRowStyle BackColor="#FF0066" ForeColor="White" />
</asp:GridView>
I think the MultiSelect and SelectionMode properties are only available with the VB.NET grid, not in ASP.NET. Bear in mind that all controls in ASP.NET are HTML-in-disguise, so they may be more limited. There is no reason why you can't have a multi-select table, but you have to do the plumbing yourself. So you need to enable row selection, either by handling the RowDataBound event as in
http://forums.asp.net/t/992062.aspx?How+to+select+row+in+gridview+on+click
or else using the MS-provided option as in
http://msdn.microsoft.com/en-us/library/wbk82279(v=vs.100).aspx
Then you need to handle the SelectedIndexChanging event, figure out which row the user clicked on, and handle the row-colouring yourself.
This problem is still actual for me 9 years later.
In As?x code I added SelectedRowStyle and asp:CommandField blocks:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
OnSelectedIndexChanged="GridView1_SelectedIndexChanged">
<SelectedRowStyle BackColor="#337ab7" ForeColor="White" />
<Columns>
<asp:CommandField SelectText="Select" ShowSelectButton="True">
<HeaderStyle Width="50px" />
</asp:CommandField>
Code behind:
protected void GridView1_OnSelectedIndexChanged(object sender, EventArgs e)
{
GridViewRow row = GridView1.SelectedRow;
}
In gridview you have to define an event onselectedindexchanged and onrowdatabound as below:
onselectedindexchanged="GridView1_SelectedIndexChanged" onrowdatabound="GridView1_RowDataBound"
to show the selected row you can use following style in your grid view:
<SelectedRowStyle BackColor="Red" />
in code behind:
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
// Set the hand mouse cursor for the selected row.
e.Row.Attributes.Add("OnMouseOver", "this.style.cursor = 'hand';");
// The seelctButton exists for ensuring the selection functionality
// and bind it with the appropriate event hanlder.
LinkButton selectButton = new LinkButton()
{
CommandName = "Select",
Text = e.Row.Cells[0].Text
};
selectButton.Font.Underline = false;
selectButton.ForeColor = Color.Black;
e.Row.Cells[0].Controls.Add(selectButton);
//e.Row.Attributes["OnClick"] =
// Page.ClientScript.GetPostBackClientHyperlink(selectButton, "");
e.Row.Attributes["onclick"] = ClientScript.GetPostBackClientHyperlink(this.GridView1, "Select$" + e.Row.RowIndex);
}
}
note: you can find the event in event window.
how would i change the value IBM to something arbitrary like Cisco in one of the gridview events listed?
there can be varying columns in the dynamic gridview so would be nice to address the column by name.
namespace WebApplication1
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
DataTable dt = new DataTable("TestTable");
dt.Columns.AddRange(new DataColumn[] { new DataColumn("id"), new DataColumn("customername") });
DataRow dr = dt.NewRow();
dr[0] = "1";
dr[1] = "Microsoft";
dt.Rows.Add(dr);
DataRow dr2 = dt.NewRow();
dr2[0] = "2";
dr2[1] = "IBM";
dt.Rows.Add(dr2);
GridView1.DataSource = dt;
GridView1.DataBind();
}
protected void GridView1_DataBinding(object sender, EventArgs e)
{
}
protected void GridView1_DataBound(object sender, EventArgs e)
{
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
}
protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{
}
}
}
This won't work when AutogenerateColumns is set to true(default). You need to add the columns programmatically or declaratively(in aspx markup). Then you can use a TemplateField with a Control like Label that you can reference in codebehind:
For example:
<asp:GridView ID="GridView1" AutoGenerateColumns="false" OnRowDataBound="GridView1_RowDataBound" runat="server">
<Columns>
<asp:TemplateField HeaderText="Customer">
<ItemTemplate>
<asp:Label ID="LblCustomer" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
RowDataBound is perfect(for almost everything):
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if(e.Row.RowType == DataControlRowType.DataRow) {
var row = ((DataRowView)e.Row.DataItem).Row;
var lblCustomer = (Label)e.Row.FindControl("LblCustomer");
var customerName = row.Field<String>( "customername" );
if(customerName == "Microsoft") {
customerName = "Cisco";
}
lblCustomer.Text = customerName;
}
}
Edit: Ok, never needed to do such. But actually you can change the Microsoft values to Cisco even with AutoGenerateColumns set to true.
DataBinding event is triggered before the GridView is databound. If you change the datasource before it's bound to grid, you'll be able to modify it:
protected void GridView1_DataBinding(object sender, EventArgs e)
{
var tbl = (DataTable)((GridView)sender).DataSource;
var msRows = tbl.AsEnumerable()
.Where(r => r.Field<String>("customername") == "Microsoft")
.Select(r => r);
foreach(DataRow msRow in msRows) {
msRow[ "customername" ] = "Cisco";
}
}
Note: of course you can also use a simple loop instead of LINQ
The qustion was modified by me to show a complete picture.
I have a basic question:
code behind:
protected void Page_Load(object sender, EventArgs e)
{
int firstPageIndex = 0;
int lastPageIndex = 5;
if (TotalPageNumber > 5)
{
if ((TotalPageNumber - PageIndex) <= 5)
firstPageIndex = TotalPageNumber - 5;
firstPageIndex = PageIndex < 3 ? 0 : PageIndex - 2;
}
else
{
firstPageIndex = 0;
lastPageIndex = TotalPageNumber;
}
for (int i = firstPageIndex; i < firstPageIndex + lastPageIndex; i++)
{
LinkButton lnk = new LinkButton();
lnk.CommandArgument = i.ToString();
lnk.Click += new EventHandler(lblPageNumber_Click);
lnk.ID = "lnkPage" + (i + 1).ToString();
lnk.Text = (i + 1).ToString();
plcPagerHolder.Controls.Add(lnk);
} }
int _pageIndex;
public int PageIndex
{
get
{
object objPage = ViewState["_pageIndex"];
if (objPage == null)
{
_pageIndex = 0;
}
else
{
_pageIndex = (int)objPage;
}
return _pageIndex;
}
set {ViewState["_pageIndex"] = value; }
}
protected void lnkPagerNext_Click(object sender, EventArgs e)
{
PageIndex = PageIndex == TotalPageNumber - 1 ? 0 : PageIndex + 1;
}
The problem is with Page_Load event, I expect to get new PageIndex after the linkbutton is clicked.
Update:
My Foo adds new controls to the page, based on provide Page index so I guess I can't put it in Prerender.
Two options
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
Foo (PageIndex);
}
}
protected void LinkButton_Click(object sender, EventArgs e)
{
PageIndex = int.Parse(((LinkButton)sender).CommandArgument);
Foo (PageIndex);
}
or
protected void Page_PreRender(object sender, EventArgs e)
{
Foo (PageIndex);
}
you can place Foo (PageIndex) in Page_LoadComplete event instead of Page_Load, i.e.
protected void Page_LoadComplete(object sender, EventArgs e)
{
Foo (PageIndex);
}
LoadComplete event is raised after Control events.
Edit:
LoadComplete is the earliest place where you can safely access new pageindex and also you can add there another controls, but that is possible also in PreRender.
And you will, but Page_Load gets called before the event handler for the linkbutton .. so, you can't really expect it to be changed yet.