I am creating dynamic textboxes when clicking on a set of different radio button. Below is an example of two radio button onclick event.
protected void Checkbox1_CheckedChanged(object sender, EventArgs e)
{
string servicename = "service1";
if (checkbox1.Checked)
{
InputParameters.InputParameters aa= new InputParameters.InputParameters();
textbox = aa.GetInputFields(servicename);
for (int i=0;i<textbox.Count;i++)
{
// declare a textbox
TextBox CPDT = new TextBox();
CPDT.ID = servicename + i.ToString();
CPDT.CssClass = "form-control";
CPDT.EnableViewState = true;
Label lblCPD=new Label();
lblCPD.ID = "txtDynamiclbl" + servicename+ i.ToString();
lblCPD.CssClass= "form-control-label";
lblCPD.Text= textbox[i].ToString();
lblCPD.EnableViewState = true;
CPDPlaceHolder.Controls.Add(lblCPD);
CPDPlaceHolder.Controls.Add(CPDT);
//this.NumberOfControls++;
}
Button callSoap = new Button();
callSoap.ID = "txtDynamicSearch" + servicename;
callSoap.Text = "Search";
callSoap.CssClass = ".btn-info";
callSoap.CommandArgument = "test";
callSoap.Click += new EventHandler(btnsoap);
callSoap.EnableViewState = true;
CPDPlaceHolder.Controls.Add(callSoap);
}
else
{
}
}
protected void Checkbox2_CheckedChanged(object sender, EventArgs e)
{
string servicename = "service2";
if (checkbox2.Checked)
{
InputParameters.InputParameters aa = new InputParameters.InputParameters();
List<String> textbox = aa.GetInputFields("test1");
// textboxs.AddRange(textbox);
for (int i = 0; i < textbox.Count; i++)
{
// declare a textbox
TextBox CPDT = new TextBox();
CPDT.ID = servicename + i.ToString();
CPDT.CssClass = "form-control";
Label lblCPD = new Label();
lblCPD.ID = "txtDynamiclbl" + servicename + i.ToString();
lblCPD.CssClass = "form-control-label";
lblCPD.Text = textbox[i].ToString();
CPDPlaceHolder.Controls.Add(lblCPD);
CPDPlaceHolder.Controls.Add(CPDT);
}
Button callSoap = new Button();
callSoap.ID = "txtDynamicSearch" + servicename;
callSoap.Text = "Search";
callSoap.CssClass = ".btn-info";
callSoap.CommandArgument = "test1";
callSoap.Click += new EventHandler(btnsoap);
callSoap.EnableViewState = true;
CPDPlaceHolder.Controls.Add(callSoap);
}
else
{
}
}
The textboxes and search button appears as needed. The problem now is when i clicked on the search button a post back occur and all the controls are gone. I have been reading a lot about initialising the controls in page_preinit and i tried the code below.
protected void Page_PreInit(object sender, EventArgs e)
{
List<string> keys = Request.Form.AllKeys.Where(key => key.Contains("txtDynamic")).ToList();
int i = 1;
try
{
foreach (string key in keys)
{
TextBox CPDT = new TextBox();
CPDT.ID = "test" + i.ToString();
CPDT.CssClass = "form-control";
Label lblCPD = new Label();
lblCPD.ID = "txtDynamiclbl" + "test" + i.ToString();
lblCPD.CssClass = "form-control-label";
lblCPD.Text = textbox[i].ToString();
CPDPlaceHolder.Controls.Add(lblCPD);
CPDPlaceHolder.Controls.Add(CPDT);
i++;
}
}
catch
{
}
}
In the above function this line only returns the search button and not the texboxes. I am stuck on this issue.
List<string> keys = Request.Form.AllKeys.Where(key => key.Contains("txtDynamic")).ToList();
T
Related
I wrote a program in which I can create a shortcut from the side forms to the main form. But when I click on each button, the relevant form does not open.
Why?
Because the amount of type to be sent is sent as null.
I will send you the relevant code. Can you help me solve the problem?
public void CreatShortCut(string idForm, string nameForm)
{
if (string.IsNullOrWhiteSpace(nameForm))
{
return;
}
else
{
button =
new System.Windows.Forms.Button();
button.Name = $"{idForm}Button";
button.Text = nameForm;
button.Size = new System.Drawing.Size(100, 30);
button.TabIndex = 0;
button.UseVisualStyleBackColor = true;
button.ContextMenuStrip = contextMenuStrip;
button.Click += Button_Click;
button.MouseEnter += Button_MouseEnter;
shortcutPanel.Controls.Add(button);
}
}
private void Button_Click(object sender, System.EventArgs e)
{
try
{
System.Windows.Forms.Button button = sender as System.Windows.Forms.Button;
string typeName =
button.Name.Replace("Button", string.Empty).Trim();
var form =
(System.Windows.Forms.Form)System.Activator.CreateInstance(System.Type.GetType(GetType().Name + "." + typeName));
form.ShowDialog();
}
catch (System.Exception ex)
{
System.Windows.Forms.MessageBox.Show($"{ex.Message}");
}
}
You're better off not passing around strings and you should avoid activators. Instead you should use generics.
Try this:
public void CreatShortCut<F>(string nameForm) where F : Form, new()
{
if (string.IsNullOrWhiteSpace(nameForm))
{
return;
}
else
{
var button = new System.Windows.Forms.Button();
button.Text = nameForm;
button.Size = new System.Drawing.Size(100, 30);
button.TabIndex = 0;
button.UseVisualStyleBackColor = true;
button.ContextMenuStrip = contextMenuStrip;
button.Click += (s, e) =>
{
var form = new F();
form.ShowDialog();
}
shortcutPanel.Controls.Add(button);
}
}
I have the following class which is the class for creating a gridview dynamic:
public class DynamicGridViewImageButtonTemplate : ITemplate
{
string _ColName;
DataControlRowType _rowType;
int _Count;
int _Kind;
public DynamicGridViewImageButtonTemplate(string ColName, DataControlRowType RowType, int Kind)
{
_ColName = ColName;
_rowType = RowType;
_Kind = Kind;
}
public void InstantiateIn(System.Web.UI.Control container)
{
switch (_rowType)
{
case DataControlRowType.DataRow:
if (_Kind == 0)
{
Label lbl = new Label();
lbl.DataBinding += new EventHandler(this.lbl_DataBind);
container.Controls.Add(lbl);
}
else
if (_Kind == 1)
{
ImageButton vImageButton = new ImageButton();
vImageButton.ID = "btnGetVoucher";
vImageButton.CommandArgument = string.Format("<%# Eval({0}) %>", "Voucher");
vImageButton.CssClass = "divButton";
vImageButton.Height = 25;
vImageButton.Width = 25;
vImageButton.Command += new CommandEventHandler(btnGetVoucher_Command);
vImageButton.DataBinding += new EventHandler(this.imgBtn_DataBind);
container.Controls.Add(vImageButton);
}
break;
default:
break;
}
}
and the following c# code for assigning methods runtime to the imagebutton which I have created in a column:
protected void btnGetVoucher_Command(object sender, CommandEventArgs e)
{
ImageButton btn = sender as ImageButton;
}
protected void gridview_RowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
ImageButton vImageButton = (ImageButton)e.Row.FindControl("btnGetVoucher");
vImageButton.Command += new CommandEventHandler(btnGetVoucher_Command);
}
}
and the creating of the gridcolumn is as follows:
GridView vGridView = new GridView();
vGridView.RowCreated += new GridViewRowEventHandler(gridview_RowCreated);
vTemplateField = new TemplateField();
vTemplateField.HeaderTemplate = new DynamicGridViewImageButtonTemplate("Voucher", DataControlRowType.Header, 0);
vTemplateField.ItemTemplate = new DynamicGridViewImageButtonTemplate("Voucher", DataControlRowType.DataRow, 1);
vGridView.Columns.Add(vTemplateField);
And at last the databind here:
private void imgBtn_DataBind(Object sender, EventArgs e)
{
ImageButton btn = (ImageButton)sender;
GridViewRow row = (GridViewRow)btn.NamingContainer;
btn.CommandArgument = DataBinder.Eval(row.DataItem, "Voucher").ToString();
}
But I can't step into the method btnGetVoucher_Command :-( I think that everything has been made correctly - but there must be something I have missed somewhere...
I can access the button in my Row_Created routine - but afterwards not use the GetVoucherCommand :-( the event is not fired :-(
So my question is why can't I step into that routine?
Thanks in advance,
Michael
Update:
The full class is here...
public class DynamicGridViewTextTemplate : ITemplate
{
string _ColNameText;
DataControlRowType _rowType;
public DynamicGridViewTextTemplate(string ColNameText, DataControlRowType RowType)
{
_ColNameText = ColNameText;
_rowType = RowType;
}
public void InstantiateIn(System.Web.UI.Control container)
{
switch (_rowType)
{
case DataControlRowType.Header:
Literal lc = new Literal();
lc.Text = "<b>" + _ColNameText + "</b>";
container.Controls.Add(lc);
break;
case DataControlRowType.DataRow:
ImageButton vImageButton = new ImageButton();
vImageButton.ID = "btnGetVoucher";
vImageButton.ImageUrl = "~/Images/Icons/icons8-download-from-the-cloud-50.png";
vImageButton.PostBackUrl = "#DownloadVoucher";
vImageButton.CommandArgument = string.Format("<%# Eval({0}) %>", "Voucher");
vImageButton.ToolTip = "Se og download bilag";
vImageButton.CssClass = "divButton";
vImageButton.Height = 25;
vImageButton.Width = 25;
vImageButton.DataBinding += new EventHandler(this.imgBtn_DataBind);
vImageButton.CommandName = "DownloadVoucher";
vImageButton.Command += new CommandEventHandler(btnGetVoucher_Command);
container.Controls.Add(vImageButton);
break;
default:
break;
}
}
private void imgBtn_DataBind(Object sender, EventArgs e)
{
ImageButton btn = (ImageButton)sender;
GridViewRow row = (GridViewRow)btn.NamingContainer;
btn.CommandArgument = DataBinder.Eval(row.DataItem, _ColNameText).ToString();
}
}
public class DynamicGridViewImageButtonTemplate : ITemplate
{
string _ColNameText;
DataControlRowType _rowType;
public DynamicGridViewImageButtonTemplate(string ColNameText, DataControlRowType RowType)
{
_ColNameText = ColNameText;
_rowType = RowType;
}
public void InstantiateIn(System.Web.UI.Control container)
{
switch (_rowType)
{
case DataControlRowType.Header:
Literal lc = new Literal();
lc.Text = "<b>" + _ColNameText + "</b>";
container.Controls.Add(lc);
break;
case DataControlRowType.DataRow:
ImageButton vImageButton = new ImageButton();
vImageButton.ID = "btnGetVoucher";
vImageButton.ImageUrl = "~/Images/Icons/icons8-download-from-the-cloud-50.png";
vImageButton.PostBackUrl = "#DownloadVoucher";
vImageButton.CommandArgument = string.Format("<%# Eval({0}) %>", "Voucher");
vImageButton.ToolTip = "Se og download bilag";
vImageButton.CssClass = "divButton";
vImageButton.Height = 25;
vImageButton.Width = 25;
vImageButton.DataBinding += new EventHandler(this.imgBtn_DataBind);
vImageButton.CommandName = "DownloadVoucher";
vImageButton.Command += new CommandEventHandler(btnGetVoucher_Command);
container.Controls.Add(vImageButton);
break;
default:
break;
}
}
protected void btnGetVoucher_Command(object sender, CommandEventArgs e)
{
ImageButton btn = sender as ImageButton;
}
private void imgBtn_DataBind(Object sender, EventArgs e)
{
ImageButton btn = (ImageButton)sender;
GridViewRow row = (GridViewRow)btn.NamingContainer;
btn.CommandArgument = DataBinder.Eval(row.DataItem, _ColNameText).ToString();
}
}
The events is here...
protected void gridview_RowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
ImageButton vImageButton = (ImageButton)e.Row.FindControl("btnGetVoucher");
}
}
protected void gridview_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
ImageButton vImageButton = (ImageButton)e.Row.FindControl("btnGetVoucher");
}
}
protected void gridview_RowCommand(object sender, CommandEventArgs e)
{
if (e.CommandName == "DownloadVoucher")
{
int index = Convert.ToInt32(e.CommandArgument);
GridView grid = sender as GridView;
GridViewRow row = grid.Rows[index];
ImageButton vImageButton = (ImageButton)row.FindControl("btnGetVoucher");
}
}
The creating of the gridview is here...
GridView vGridView = new GridView();
vGridView.AutoGenerateColumns = false;
vGridView.ShowHeaderWhenEmpty = true;
vGridView.ShowHeader = true;
vGridView.HeaderStyle.BackColor = System.Drawing.ColorTranslator.FromHtml("#C6E0B4");
vGridView.HeaderStyle.HorizontalAlign = HorizontalAlign.Left;
vGridView.RowCreated += new GridViewRowEventHandler(gridview_RowCreated);
vGridView.RowDataBound += new GridViewRowEventHandler(gridview_RowDataBound);
vGridView.RowCommand += new GridViewCommandEventHandler(gridview_RowCommand);
vTemplateField = new TemplateField();
vTemplateField.HeaderTemplate = new DynamicGridViewImageButtonTemplate("Voucher", DataControlRowType.Header);
vTemplateField.ItemTemplate = new DynamicGridViewImageButtonTemplate("Voucher", DataControlRowType.DataRow);
vGridView.Columns.Add(vTemplateField);
micheal.
in this code, i can't see event handling code in InstantiateIn method.
ex) like this.
lbl.DataBinding += new EventHandler(this.btnGetVoucher_Command);
DynamicGridViewTextTemplate class constructor args are 3 count.
but, when using DynamicGridViewTextTemplate constructor,
used only 2 count args.
where is kind?
try it.
vTemplateField.HeaderTemplate = new DynamicGridViewImageButtonTemplate("Voucher", DataControlRowType.Header, 0);
vTemplateField.ItemTemplate = new DynamicGridViewImageButtonTemplate("Voucher", DataControlRowType.DataRow, 1);
best example in msdn
https://learn.microsoft.com/ko-kr/dotnet/api/system.web.ui.webcontrols.templatefield.-ctor?view=netframework-4.8
I hope this answer helps you.
protected void Page_Load(object sender, EventArgs e)
{
Team T = new Team();
string[] TLeaders = T.GetAllTeamLeaders(Session["USER_EMAIL"].ToString(), Session["ProjectID"].ToString());
for (int i = 0; i < TLeaders.Length; i++)
{
System.Web.UI.HtmlControls.HtmlGenericControl createDiv =new System.Web.UI.HtmlControls.HtmlGenericControl("DIV");
createDiv.Style.Add(HtmlTextWriterStyle.BorderStyle, "Solid");
createDiv.Style.Add(HtmlTextWriterStyle.BorderColor, "lightblue");
createDiv.Style.Add(HtmlTextWriterStyle.BorderWidth, "1px");
createDiv.Style.Add(HtmlTextWriterStyle.Height, "100px");
createDiv.Style.Add(HtmlTextWriterStyle.Width, "1350px");
createDiv.Style.Add(HtmlTextWriterStyle.MarginTop, "20px");
createDiv.Style.Add(HtmlTextWriterStyle.BackgroundColor, "white");
DivRate.Controls.Add(createDiv);
Label LeaderName = new Label();
LeaderName.Text = TLeaders[i];
LeaderName.Style.Add("margin-left", "600px");
LeaderName.Style.Add("color","gray");
LeaderName.Style.Add("font-size","20px;");
LeaderName.Style.Add("margin-top", "10px");
LeaderName.Style.Add("position", "absolute");
createDiv.Controls.Add(LeaderName);
RadioButtonList Rate = new RadioButtonList();
ListItem bad = new ListItem();
ListItem fair = new ListItem();
ListItem good= new ListItem();
ListItem veryGood = new ListItem();
ListItem excellent = new ListItem();
bad.Value = "1";
bad.Text = "Bad";
fair.Value = "2";
fair.Text = "Fair";
good.Value = "3";
good.Text = "Good";
veryGood.Value = "4";
veryGood.Text = "Very Good";
excellent.Value = "5";
excellent.Text = "Excellent";
Rate.AutoPostBack = true;
Rate.Items.Add(bad);
Rate.Items.Add(fair);
Rate.Items.Add(good);
Rate.Items.Add(veryGood);
Rate.Items.Add(excellent);
Rate.Attributes.Add("onchange", "return LeaderName('"+TLeaders[i]+"');");
Rate.SelectedIndexChanged += new EventHandler(CheckChange("s"));
Rate.RepeatColumns=5;
Rate.Width = 10;
Rate.Height = 10;
Rate.CssClass = "RateClass";
createDiv.Controls.Add(Rate);
}
}
so in this code I create a div and I place inside it a label and a Radio Button List however what i want to do is to create an event handler and send a data to it when i call it i call it like this:
Rate.SelectedIndexChanged += new EventHandler(CheckChange("s"));
and this is the event handler:
protected void CheckChange(string s)
{
ScriptManager.RegisterStartupScript(Page, typeof(Page), "", "fun('" + s + "')", true);
}
It give me an error "method name expected" when I send the data like this
any solution?
I am grabbing some records from a database depending on the id number of the page, the amount of records that will display will vary, anywhere to 1 record to 50. I need to take these records then choose which ones I will be modifying, deleting, or won't change at all. I would like it to look like this:
Can't get image to show with stackoverflow image uploader so here: https://dl.dropboxusercontent.com/u/9446763/code/dropdownlist.jpg
I would like the text fields to be disabled if No Change or Remove is selected, and the fields enabled for revising if the option Modify is selected.
Below is what I have so far, the part I am struggling on is the selectedindex change I do not know how to code it so that when Modify is selected in the dropdown box the appropriate textboxes become enabled.
ASPX Page
<asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
CS Page
private void createControls()
{
var id = Request.Params["ID"];
System.Data.OleDb.OleDbConnection pcn;
System.Data.OleDb.OleDbCommand pcm;
System.Data.OleDb.OleDbDataReader prs;
pcn = new System.Data.OleDb.OleDbConnection("");
pcm = new System.Data.OleDb.OleDbCommand();
pcn.Open();
pcm.Connection = pcn;
var tableSql = #"select * FROM grouplist where ptid = '" + id + "'";
pcm.CommandText = tableSql;
prs = pcm.ExecuteReader();
var rowcount = 0;
while (prs.Read())
{
rowcount++;
PlaceHolder1.Controls.Add(new Literal() { Text = "<div class='row'><div class='span3'>" });
TextBox tx = new TextBox();
tx.ID = "txtData" + rowcount.ToString();
tx.Text = prs["name"].ToString().Trim();
tx.Width = 200;
tx.CssClass = "span2";
tx.Enabled = false;
PlaceHolder1.Controls.Add(tx);
PlaceHolder1.Controls.Add(new Literal() { Text = "</div><div class='span2'>" });
TextBox txa = new TextBox();
txa.ID = "amtData" + rowcount.ToString();
txa.Text = prs["amt"].ToString();
txa.CssClass = "span2";
txa.Enabled = false;
PlaceHolder1.Controls.Add(txa);
PlaceHolder1.Controls.Add(new Literal() { Text = "</div><div class='span3'>" });
DropDownList ddl = new DropDownList();
ddl.Items.Add("No Change");
ddl.Items.Add("Modify");
ddl.Items.Add("Remove");
ddl.Width = 200;
ddl.CssClass = "span2";
ddl.SelectedIndexChanged += new EventHandler(ddl_SelectedIndexChanged);
ddl.AutoPostBack = true;
ddl.ID = "ddlData" + rowcount.ToString();
PlaceHolder1.Controls.Add(ddl);
PlaceHolder1.Controls.Add(new Literal() { Text = "</div></div>" });
}
prs.Close();
}
void ddl_SelectedIndexChanged(object sender, EventArgs e)
{
}
You need to have members in your class that hold references to your DropDownList and other controls that you want to enable/disable.
public class YourClass {
private DropDownList ddl;
private TestBox txa;
private void createControls {
// ...
TextBox txa = new TextBox();
txa.ID = "amtData" + rowcount.ToString();
// ...
DropDownList ddl = new DropDownList();
ddl.Items.Add("No Change");
// ... etc.
}
void ddl_SelectedIndexChanged(object sender, EventArgs e)
{
if (ddl.SelectedIndex == 1)
txa.Enabled = true;
}
}
I have an AJAX accordion from the ajax control toolkit on a page with a datagrid inside on of the panels. I have a custom itemtemplate for the one column to create a multiline textbox when I click edit on the row. When I click update on the row, the original content of the textbox gets rendered into the textbox. It is supposed to update and go back to the literal not the textbox. When I put the DataBind() into a !IsPostBack, it doesnt get rendered when I click on the accordion pane. Any ideas?
Code:
protected void Page_Load(object sender, EventArgs e)
{
announ.HeaderStyle.CssClass = "header";
announ.Width = Unit.Percentage(100);
announ.GridLines = GridLines.None;
announ.AutoGenerateColumns = false;
announ.CellPadding = 10;
announ.CellSpacing = 0;
announ.HorizontalAlign = HorizontalAlign.Center;
announ.HeaderStyle.Font.Bold = true;
announ.EnableViewState = false;
announ.AlternatingItemStyle.BackColor = System.Drawing.Color.GhostWhite;
//announ.DeleteCommand += AnnounDeleteCommand;
announ.EditCommand += announ_EditCommand;
announ.UpdateCommand += announ_UpdateCommand;
announ.CancelCommand += announ_CancelCommand;
announ.DataKeyField = "id";
var tc1 = new TemplateColumn
{
HeaderTemplate = new
DataGridTemplate(ListItemType.Header, "Announcement"),
ItemTemplate = new DataGridTemplate(ListItemType.Item, "announcement_text"),
EditItemTemplate = new
DataGridTemplate(ListItemType.EditItem, "announcement_text")
};
var editColumn = new EditCommandColumn
{
ButtonType = ButtonColumnType.PushButton,
HeaderText = "Edit",
EditText = "Edit",
UpdateText = "Update",
CancelText = "Cancel"
};
var dateColumn = new BoundColumn {HeaderText = "Posted On", DataField = "date", ReadOnly = true};
var expirationColumn = new BoundColumn {HeaderText = "Expiration Date", DataField = "expiration_date"};
announ.Columns.Add(tc1);
announ.Columns.Add(dateColumn);
announ.Columns.Add(expirationColumn);
announ.DataSource = myAnnouncements;
announ.DataBind();
var deptMgtaccord = new Accordion
{
ID = "deptMgtaccord",
HeaderCssClass = "accordion-header",
HeaderSelectedCssClass = "accordion-headerSelected",
AutoSize = AutoSize.None,
SelectedIndex = 0,
FadeTransitions = true,
TransitionDuration = 250,
FramesPerSecond = 40,
RequireOpenedPane = false,
SuppressHeaderPostbacks = true
};
if (IsPostBack)
{
deptMgtaccord.SelectedIndex = selected;
}
var announcementPane = new AccordionPane {ID = "announcementPane"};
announcementPane.HeaderContainer.Attributes.Add("onmouseover", "this.style.backgroundColor='#e3e2e2';");
announcementPane.HeaderContainer.Attributes.Add("onmouseout", "this.style.backgroundColor='#ffffff';");
announcementPane.HeaderContainer.Controls.Add(new LiteralControl("Announcements >>"));
announcementPane.ContentContainer.Controls.Add(announ);
deptMgtaccord.Panes.Add(announcementPane);
var statsPane = new AccordionPane {ID = "statsPane"};
statsPane.HeaderContainer.Attributes.Add("onmouseover", "this.style.backgroundColor='#e3e2e2';");
statsPane.HeaderContainer.Attributes.Add("onmouseout", "this.style.backgroundColor='#ffffff';");
statsPane.HeaderContainer.Controls.Add(new LiteralControl("Statistics >>"));
statsPane.ContentContainer.Controls.Add(new LiteralControl("Stats"));
deptMgtaccord.Panes.Add(statsPane);
ph1.Controls.Add(deptMgtaccord);
}
protected void announ_CancelCommand(object source, DataGridCommandEventArgs e)
{
announ.EditItemIndex = -1;
announ.DataBind();
}
protected void announ_UpdateCommand(object source, DataGridCommandEventArgs e)
{
var dc = new MTCDataDataContext();
var announText = (TextBox) e.Item.Cells[1].Controls[1];
int announId = (int)announ.DataKeys[e.Item.ItemIndex];
var currentAnnoun = (from a in dc.announcements
where a.id == announId
select a).SingleOrDefault();
currentAnnoun.announcement_text = announText.Text;
dc.SubmitChanges();
announ.EditItemIndex = -1;
announ.DataBind();
}
protected void announ_EditCommand(object source, DataGridCommandEventArgs e)
{
announ.EditItemIndex = e.Item.ItemIndex;
announ.DataBind();
}
public class DataGridTemplate : ITemplate
{
ListItemType templateType;
string columnName;
public DataGridTemplate(ListItemType type, string colname)
{
templateType = type;
columnName = colname;
}
public void InstantiateIn(Control container)
{
Literal lc = new Literal();
TextBox tb = new TextBox();
switch (templateType)
{
case ListItemType.Header:
lc.Text = "<B>" + columnName + "</B>";
container.Controls.Add(lc);
break;
case ListItemType.Item:
lc.DataBinding += lc_DataBinding;
container.Controls.Add(lc);
break;
case ListItemType.EditItem:
tb.TextMode = TextBoxMode.MultiLine;
tb.Rows = 6;
tb.Columns = 57;
tb.DataBinding += tb_DataBinding;
container.Controls.Add(tb);
break;
case ListItemType.Footer:
lc.Text = "<I>" + columnName + "</I>";
container.Controls.Add(lc);
break;
}
}
void tb_DataBinding(object sender, EventArgs e)
{
TextBox tb = (TextBox)sender;
DataGridItem row = (DataGridItem)tb.NamingContainer;
tb.ID = "txt_" + row.ItemIndex;
tb.Text = DataBinder.Eval(row.DataItem, columnName).ToString();
}
void lc_DataBinding(object sender, EventArgs e)
{
Literal lc = (Literal)sender;
DataGridItem row = (DataGridItem)lc.NamingContainer;
lc.ID = "txt_" + row.ItemIndex;
lc.Text = DataBinder.Eval(row.DataItem, columnName).ToString();
}
}
You need to add your dynamic controls in PreInit on every request in order for the controls to get back into the ControlTree and raise events.
Page Event:
PreInit
Typical Use:
Raised after the start stage is complete and before the initialization stage begins.
Use this event for the following:
Check the IsPostBack property to determine whether this is the first
time the page is being processed. The
IsCallback and IsCrossPagePostBack
properties have also been set at this
time.
Create or re-create dynamic controls.
Set a master page dynamically.
Set the Theme property dynamically.
Read or set profile property values.
Note: If the request is a postback, the values of the controls have not yet been restored from view state. If you set a control property at this stage, its value might be overwritten in the next event.