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Panel SyntaxWhat is the syntax to access the contents of TextBox1? Also, what is the syntax to iterate all occurrences of the TextBoxes? Thanks, TC <%@ Page Language="C#" AutoEventWireup="True" %> <html> <head> <script runat="server"> void Page_Load(Object sender, EventArgs e) { // Show or hide the Panel contents. if (Check1.Checked) { Panel1.Visible=false; } else { Panel1.Visible=true; } // Generate the Label controls. int numlabels = Int32.Parse(DropDown1.SelectedItem.Value); for (int i=1; i<=numlabels; i++) { Label l = new Label(); l.Text = "Label" + (i).ToString(); l.ID = "Label" + (i).ToString(); Panel1.Controls.Add(l); Panel1.Controls.Add(new LiteralControl("<br>")); } // Generate the Textbox controls. int numtexts = Int32.Parse(DropDown2.SelectedItem.Value); for (int i=1; i<=numtexts; i++) { TextBox t = new TextBox(); t.Text = "TextBox" + (i).ToString(); t.ID = "TextBox" + (i).ToString(); Panel1.Controls.Add(t); Panel1.Controls.Add(new LiteralControl("<br>")); } } </script> </head> <body> <h3>Panel Example</h3> <form runat=server> <asp:Panel id="Panel1" runat="server" BackColor="gainsboro" Height="200px" Width="300px"> Panel1: Here is some static content... <p> </asp:Panel> <p> Generate Labels: <asp:DropDownList id=DropDown1 runat="server"> <asp:ListItem Value="0">0</asp:ListItem> <asp:ListItem Value="1">1</asp:ListItem> <asp:ListItem Value="2">2</asp:ListItem> <asp:ListItem Value="3">3</asp:ListItem> <asp:ListItem Value="4">4</asp:ListItem> </asp:DropDownList> <br> Generate TextBoxes: <asp:DropDownList id=DropDown2 runat="server"> <asp:ListItem Value="0">0</asp:ListItem> <asp:ListItem Value="1">1</asp:ListItem> <asp:ListItem Value="2">2</asp:ListItem> <asp:ListItem Value="3">3</asp:ListItem> <asp:ListItem Value="4">4</asp:ListItem> </asp:DropDownList> <p> <asp:CheckBox id="Check1" Text="Hide Panel" runat="server"/> <p> <asp:Button Text="Refresh Panel" runat="server"/> </form> </body> </html> TextBox tb = (TextBox)Panel1.FindControl("TextBox1");
Show quoteHide quote "TC" wrote: > > In the below example of code, > > What is the syntax to access the contents of TextBox1? > > Also, what is the syntax to iterate all occurrences of the TextBoxes? > > Thanks, > > TC > > <%@ Page Language="C#" AutoEventWireup="True" %> > <html> > <head> > > <script runat="server"> > > void Page_Load(Object sender, EventArgs e) { > > // Show or hide the Panel contents. > > if (Check1.Checked) { > Panel1.Visible=false; > } > else { > Panel1.Visible=true; > } > > // Generate the Label controls. > > int numlabels = Int32.Parse(DropDown1.SelectedItem.Value); > > for (int i=1; i<=numlabels; i++) { > Label l = new Label(); > l.Text = "Label" + (i).ToString(); > l.ID = "Label" + (i).ToString(); > Panel1.Controls.Add(l); > Panel1.Controls.Add(new LiteralControl("<br>")); > } > > // Generate the Textbox controls. > > int numtexts = Int32.Parse(DropDown2.SelectedItem.Value); > > for (int i=1; i<=numtexts; i++) { > TextBox t = new TextBox(); > t.Text = "TextBox" + (i).ToString(); > t.ID = "TextBox" + (i).ToString(); > Panel1.Controls.Add(t); > Panel1.Controls.Add(new LiteralControl("<br>")); > } > } > > </script> > > </head> > <body> > > <h3>Panel Example</h3> > > <form runat=server> > > <asp:Panel id="Panel1" runat="server" > BackColor="gainsboro" > Height="200px" > Width="300px"> > > Panel1: Here is some static content... > <p> > > </asp:Panel> > > <p> > > Generate Labels: > <asp:DropDownList id=DropDown1 runat="server"> > <asp:ListItem Value="0">0</asp:ListItem> > <asp:ListItem Value="1">1</asp:ListItem> > <asp:ListItem Value="2">2</asp:ListItem> > <asp:ListItem Value="3">3</asp:ListItem> > <asp:ListItem Value="4">4</asp:ListItem> > </asp:DropDownList> > > <br> > > Generate TextBoxes: > <asp:DropDownList id=DropDown2 runat="server"> > <asp:ListItem Value="0">0</asp:ListItem> > <asp:ListItem Value="1">1</asp:ListItem> > <asp:ListItem Value="2">2</asp:ListItem> > <asp:ListItem Value="3">3</asp:ListItem> > <asp:ListItem Value="4">4</asp:ListItem> > </asp:DropDownList> > > <p> > <asp:CheckBox id="Check1" Text="Hide Panel" runat="server"/> > > <p> > <asp:Button Text="Refresh Panel" runat="server"/> > > > </form> > > </body> > </html> > To iterate all occurrences of the TextBoxes:
foreach(Control cntrl in Panel1.Controls) { if (cntrl is TextBox) { TextBox myTextBox = (TextBox)cntrl; //process based on the textbox } } Show quoteHide quote "Phillip Williams" wrote: > TextBox tb = (TextBox)Panel1.FindControl("TextBox1"); > > -- > HTH, > Phillip Williams > http://www.societopia.net > http://www.webswapp.com > > > "TC" wrote: > > > > > In the below example of code, > > > > What is the syntax to access the contents of TextBox1? > > > > Also, what is the syntax to iterate all occurrences of the TextBoxes? > > > > Thanks, > > > > TC > > > > <%@ Page Language="C#" AutoEventWireup="True" %> > > <html> > > <head> > > > > <script runat="server"> > > > > void Page_Load(Object sender, EventArgs e) { > > > > // Show or hide the Panel contents. > > > > if (Check1.Checked) { > > Panel1.Visible=false; > > } > > else { > > Panel1.Visible=true; > > } > > > > // Generate the Label controls. > > > > int numlabels = Int32.Parse(DropDown1.SelectedItem.Value); > > > > for (int i=1; i<=numlabels; i++) { > > Label l = new Label(); > > l.Text = "Label" + (i).ToString(); > > l.ID = "Label" + (i).ToString(); > > Panel1.Controls.Add(l); > > Panel1.Controls.Add(new LiteralControl("<br>")); > > } > > > > // Generate the Textbox controls. > > > > int numtexts = Int32.Parse(DropDown2.SelectedItem.Value); > > > > for (int i=1; i<=numtexts; i++) { > > TextBox t = new TextBox(); > > t.Text = "TextBox" + (i).ToString(); > > t.ID = "TextBox" + (i).ToString(); > > Panel1.Controls.Add(t); > > Panel1.Controls.Add(new LiteralControl("<br>")); > > } > > } > > > > </script> > > > > </head> > > <body> > > > > <h3>Panel Example</h3> > > > > <form runat=server> > > > > <asp:Panel id="Panel1" runat="server" > > BackColor="gainsboro" > > Height="200px" > > Width="300px"> > > > > Panel1: Here is some static content... > > <p> > > > > </asp:Panel> > > > > <p> > > > > Generate Labels: > > <asp:DropDownList id=DropDown1 runat="server"> > > <asp:ListItem Value="0">0</asp:ListItem> > > <asp:ListItem Value="1">1</asp:ListItem> > > <asp:ListItem Value="2">2</asp:ListItem> > > <asp:ListItem Value="3">3</asp:ListItem> > > <asp:ListItem Value="4">4</asp:ListItem> > > </asp:DropDownList> > > > > <br> > > > > Generate TextBoxes: > > <asp:DropDownList id=DropDown2 runat="server"> > > <asp:ListItem Value="0">0</asp:ListItem> > > <asp:ListItem Value="1">1</asp:ListItem> > > <asp:ListItem Value="2">2</asp:ListItem> > > <asp:ListItem Value="3">3</asp:ListItem> > > <asp:ListItem Value="4">4</asp:ListItem> > > </asp:DropDownList> > > > > <p> > > <asp:CheckBox id="Check1" Text="Hide Panel" runat="server"/> > > > > <p> > > <asp:Button Text="Refresh Panel" runat="server"/> > > > > > > </form> > > > > </body> > > </html> > > Phillip,
Thanks you. One question, If I created the panel on load pre-postback, and inputed content into the panel. Would I use the same syntax to access the contents after postback? I get the following message when I play with the Immediate Window (after postback): "function 'Panel1.FindControl' evaluated and returned null". Thanks again. TC Show quoteHide quote "Phillip Williams" wrote: > To iterate all occurrences of the TextBoxes: > > foreach(Control cntrl in Panel1.Controls) > { > if (cntrl is TextBox) > { > TextBox myTextBox = (TextBox)cntrl; > //process based on the textbox > } > } > > "Phillip Williams" wrote: > > > TextBox tb = (TextBox)Panel1.FindControl("TextBox1"); > > > > -- > > HTH, > > Phillip Williams > > http://www.societopia.net > > http://www.webswapp.com > > > > > > "TC" wrote: > > > > > > > > In the below example of code, > > > > > > What is the syntax to access the contents of TextBox1? > > > > > > Also, what is the syntax to iterate all occurrences of the TextBoxes? > > > > > > Thanks, > > > > > > TC > > > > > > <%@ Page Language="C#" AutoEventWireup="True" %> > > > <html> > > > <head> > > > > > > <script runat="server"> > > > > > > void Page_Load(Object sender, EventArgs e) { > > > > > > // Show or hide the Panel contents. > > > > > > if (Check1.Checked) { > > > Panel1.Visible=false; > > > } > > > else { > > > Panel1.Visible=true; > > > } > > > > > > // Generate the Label controls. > > > > > > int numlabels = Int32.Parse(DropDown1.SelectedItem.Value); > > > > > > for (int i=1; i<=numlabels; i++) { > > > Label l = new Label(); > > > l.Text = "Label" + (i).ToString(); > > > l.ID = "Label" + (i).ToString(); > > > Panel1.Controls.Add(l); > > > Panel1.Controls.Add(new LiteralControl("<br>")); > > > } > > > > > > // Generate the Textbox controls. > > > > > > int numtexts = Int32.Parse(DropDown2.SelectedItem.Value); > > > > > > for (int i=1; i<=numtexts; i++) { > > > TextBox t = new TextBox(); > > > t.Text = "TextBox" + (i).ToString(); > > > t.ID = "TextBox" + (i).ToString(); > > > Panel1.Controls.Add(t); > > > Panel1.Controls.Add(new LiteralControl("<br>")); > > > } > > > } > > > > > > </script> > > > > > > </head> > > > <body> > > > > > > <h3>Panel Example</h3> > > > > > > <form runat=server> > > > > > > <asp:Panel id="Panel1" runat="server" > > > BackColor="gainsboro" > > > Height="200px" > > > Width="300px"> > > > > > > Panel1: Here is some static content... > > > <p> > > > > > > </asp:Panel> > > > > > > <p> > > > > > > Generate Labels: > > > <asp:DropDownList id=DropDown1 runat="server"> > > > <asp:ListItem Value="0">0</asp:ListItem> > > > <asp:ListItem Value="1">1</asp:ListItem> > > > <asp:ListItem Value="2">2</asp:ListItem> > > > <asp:ListItem Value="3">3</asp:ListItem> > > > <asp:ListItem Value="4">4</asp:ListItem> > > > </asp:DropDownList> > > > > > > <br> > > > > > > Generate TextBoxes: > > > <asp:DropDownList id=DropDown2 runat="server"> > > > <asp:ListItem Value="0">0</asp:ListItem> > > > <asp:ListItem Value="1">1</asp:ListItem> > > > <asp:ListItem Value="2">2</asp:ListItem> > > > <asp:ListItem Value="3">3</asp:ListItem> > > > <asp:ListItem Value="4">4</asp:ListItem> > > > </asp:DropDownList> > > > > > > <p> > > > <asp:CheckBox id="Check1" Text="Hide Panel" runat="server"/> > > > > > > <p> > > > <asp:Button Text="Refresh Panel" runat="server"/> > > > > > > > > > </form> > > > > > > </body> > > > </html> > > > I found my answer. Because of managed code I should not be playing in the
postback world. Instead I should place my code into an event (like a button click). Thanks Show quoteHide quote "TC" wrote: > Phillip, > > Thank you. > > One question, If I created the panel on load pre-postback, and inputed > content into the panel. Would I use the same syntax to access the contents > after postback? > > I get the following message when I play with the Immediate Window (after > postback): > "function 'Panel1.FindControl' evaluated and returned null". > > Thanks again. > TC > > "Phillip Williams" wrote: > > > To iterate all occurrences of the TextBoxes: > > > > foreach(Control cntrl in Panel1.Controls) > > { > > if (cntrl is TextBox) > > { > > TextBox myTextBox = (TextBox)cntrl; > > //process based on the textbox > > } > > } > > > > "Phillip Williams" wrote: > > > > > TextBox tb = (TextBox)Panel1.FindControl("TextBox1"); > > > > > > -- > > > HTH, > > > Phillip Williams > > > http://www.societopia.net > > > http://www.webswapp.com > > > > > > > > > "TC" wrote: > > > > > > > > > > > In the below example of code, > > > > > > > > What is the syntax to access the contents of TextBox1? > > > > > > > > Also, what is the syntax to iterate all occurrences of the TextBoxes? > > > > > > > > Thanks, > > > > > > > > TC > > > > > > > > <%@ Page Language="C#" AutoEventWireup="True" %> > > > > <html> > > > > <head> > > > > > > > > <script runat="server"> > > > > > > > > void Page_Load(Object sender, EventArgs e) { > > > > > > > > // Show or hide the Panel contents. > > > > > > > > if (Check1.Checked) { > > > > Panel1.Visible=false; > > > > } > > > > else { > > > > Panel1.Visible=true; > > > > } > > > > > > > > // Generate the Label controls. > > > > > > > > int numlabels = Int32.Parse(DropDown1.SelectedItem.Value); > > > > > > > > for (int i=1; i<=numlabels; i++) { > > > > Label l = new Label(); > > > > l.Text = "Label" + (i).ToString(); > > > > l.ID = "Label" + (i).ToString(); > > > > Panel1.Controls.Add(l); > > > > Panel1.Controls.Add(new LiteralControl("<br>")); > > > > } > > > > > > > > // Generate the Textbox controls. > > > > > > > > int numtexts = Int32.Parse(DropDown2.SelectedItem.Value); > > > > > > > > for (int i=1; i<=numtexts; i++) { > > > > TextBox t = new TextBox(); > > > > t.Text = "TextBox" + (i).ToString(); > > > > t.ID = "TextBox" + (i).ToString(); > > > > Panel1.Controls.Add(t); > > > > Panel1.Controls.Add(new LiteralControl("<br>")); > > > > } > > > > } > > > > > > > > </script> > > > > > > > > </head> > > > > <body> > > > > > > > > <h3>Panel Example</h3> > > > > > > > > <form runat=server> > > > > > > > > <asp:Panel id="Panel1" runat="server" > > > > BackColor="gainsboro" > > > > Height="200px" > > > > Width="300px"> > > > > > > > > Panel1: Here is some static content... > > > > <p> > > > > > > > > </asp:Panel> > > > > > > > > <p> > > > > > > > > Generate Labels: > > > > <asp:DropDownList id=DropDown1 runat="server"> > > > > <asp:ListItem Value="0">0</asp:ListItem> > > > > <asp:ListItem Value="1">1</asp:ListItem> > > > > <asp:ListItem Value="2">2</asp:ListItem> > > > > <asp:ListItem Value="3">3</asp:ListItem> > > > > <asp:ListItem Value="4">4</asp:ListItem> > > > > </asp:DropDownList> > > > > > > > > <br> > > > > > > > > Generate TextBoxes: > > > > <asp:DropDownList id=DropDown2 runat="server"> > > > > <asp:ListItem Value="0">0</asp:ListItem> > > > > <asp:ListItem Value="1">1</asp:ListItem> > > > > <asp:ListItem Value="2">2</asp:ListItem> > > > > <asp:ListItem Value="3">3</asp:ListItem> > > > > <asp:ListItem Value="4">4</asp:ListItem> > > > > </asp:DropDownList> > > > > > > > > <p> > > > > <asp:CheckBox id="Check1" Text="Hide Panel" runat="server"/> > > > > > > > > <p> > > > > <asp:Button Text="Refresh Panel" runat="server"/> > > > > > > > > > > > > </form> > > > > > > > > </body> > > > > </html> > > > > 
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