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March 27th, 2009, 11:15 AM
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Authorized User
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Need to click radio button twice for event to fire
I have a page that has a text field where users enter a number, then they can select either Dollars or Euros and the amount is converted. It works fine except that the user has to click the radio button twice the first time the page loads to get the conversion to fire. Below is my code:
ProtectedSub radio1_SelectedIndexChanged(ByVal sender AsObject, ByVal e As System.EventArgs) Handles radio1.SelectedIndexChanged
If Page.IsValid Then
If radio1.SelectedItem.ToString = "Dollars"Then
Dim result AsSingle = 0
Dim crate AsSingle = 0.7836
Dim currency AsSingle = Convert.ToSingle(txtcurrency.Text)
result = currency * crate
lblcurrencyResult.Text = System.Math.Round(Convert.ToDecimal(result), 2) & " €"
ElseIf radio1.SelectedItem.ToString = "Euros"Then
Dim result AsSingle = 0
Dim crate AsSingle = 1.2762
Dim currency AsSingle = Convert.ToSingle(txtcurrency.Text)
result = currency * crate
lblcurrencyResult.Text = "$ " & System.Math.Round(Convert.ToDecimal(result), 2)
Else
lblcurrencyResult.Text = ""
EndIf
EndIf
EndSub
Any idea why this is happening?
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March 27th, 2009, 11:26 AM
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Friend of Wrox
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March 27th, 2009, 12:53 PM
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Authorized User
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Join Date: Jan 2009
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Thank you but that doesn't offer any help. The problem seems to be with the If Page.IsValid statement. With that statement, when the page loads and I click on the radio button, it clicks but nothing happens. When I click on it a second time, the event fires. However when I remove the Page.IsValid Statement, it works fine.
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March 27th, 2009, 12:59 PM
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Wrox Author
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Join Date: Jun 2003
Posts: 17,089
Thanks: 80
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In that case, you'll need to post more code. Maybe there is a reason why the page is not valid the first time? If you do post the code, please use the Code button from the toolbar to format it.
Imar
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March 27th, 2009, 01:04 PM
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Code:
<asp:ContentID="Content2"ContentPlaceHolderID="cpMainContent"Runat="Server">
<asp:UpdatePanelID="UpdatePanel1"runat="server">
<ContentTemplate>
<tablewidth="100%">
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
</td>
<tdclass="style4">Value</td>
<tdclass="style2">Unit of Measurement</td>
<td>Converted Value</td>
</tr>
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
Currency</td>
<tdclass="style4">
<asp:TextBoxID="txtcurrency"runat="server"AutoPostBack="True"CausesValidation="True"Width="49px"style="margin-left: 0px"></asp:TextBox>
</td>
<tdclass="style2">
<asp:radiobuttonlistid="radio1"runat="server"AutoPostBack="True"CausesValidation="True">
<asp:listitemid="option1"runat="server"value="Dollars"/>
<asp:listitemid="option2"runat="server"value="Euros"/>
</asp:radiobuttonlist></td>
<td><asp:LabelID="lblcurrencyResult"runat="server"></asp:Label></td>
</tr>
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
</td>
<tdclass="style1"colspan="2">
<asp:RangeValidatorID="RangeValidator1"runat="server"ControlToValidate="txtcurrency"ErrorMessage="Please enter a valid number"MaximumValue="1000000"MinimumValue="0"Type="Double"></asp:RangeValidator>
</td>
<td> </td>
</tr>
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
</td>
<tdclass="style4"> </td>
<tdclass="style2"> </td>
<td> </td>
</tr>
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
Temperature</td>
<tdclass="style4">
<asp:TextBoxID="txttemp"runat="server"AutoPostBack="True"CausesValidation="True"Width="49px"></asp:TextBox>
</td>
<tdclass="style2">
<asp:RadioButtonListID="radio2"runat="server"AutoPostBack="True">
<asp:ListItemID="option3"runat="server"value="° Fahrenheit"/>
<asp:ListItemID="option4"runat="server"value="° Celcius"/>
</asp:RadioButtonList>
</td>
<td>
<asp:LabelID="lbltempResult"runat="server"></asp:Label>
</td>
</tr>
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
</td>
<tdclass="style4">
<asp:RangeValidatorID="RangeValidator2"runat="server"ControlToValidate="txttemp"ErrorMessage="Please enter a valid number"MaximumValue="1000"MinimumValue="0"Type="Double"></asp:RangeValidator>
</td>
<tdclass="style2"> </td>
<td> </td>
</tr>
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
</td>
<tdclass="style4"> </td>
<tdclass="style2"> </td>
<td> </td>
</tr>
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
Weight</td>
<tdclass="style4">
<asp:TextBoxID="txtweight"runat="server"AutoPostBack="True"CausesValidation="True"Width="49px"></asp:TextBox>
</td>
<tdclass="style2">
<asp:RadioButtonListID="radio3"runat="server"AutoPostBack="True">
<asp:ListItemID="option5"runat="server"value="Pounds"/>
<asp:ListItemID="option6"runat="server"value="Kilos"/>
</asp:RadioButtonList>
</td>
<td>
<asp:LabelID="lblweightResult"runat="server"></asp:Label>
</td>
</tr>
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
</td>
<tdclass="style4">
<asp:RangeValidatorID="RangeValidator3"runat="server"ControlToValidate="txtweight"ErrorMessage="Please enter a valid number"MaximumValue="1000"MinimumValue="0"Type="Double"></asp:RangeValidator>
</td>
<tdclass="style2"> </td>
<td> </td>
</tr>
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
</td>
<tdclass="style4"> </td>
<tdclass="style2"> </td>
<td> </td>
</tr>
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
Height</td>
<tdclass="style4">
<asp:TextBoxID="txtheight"runat="server"AutoPostBack="True"CausesValidation="True"Width="49px"></asp:TextBox>
</td>
<tdclass="style2">
<asp:RadioButtonListID="radio4"runat="server"AutoPostBack="True">
<asp:ListItemID="option7"runat="server"value="Inches"/>
<asp:ListItemID="option8"runat="server"value="Meters"/>
</asp:RadioButtonList>
</td>
<td>
<asp:LabelID="lblheightResult"runat="server"></asp:Label>
</td>
</tr>
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
</td>
<tdclass="style4">
<asp:RangeValidatorID="RangeValidator4"runat="server"ControlToValidate="txtheight"ErrorMessage="Please enter a valid number"MaximumValue="1000"MinimumValue="0"Type="Double"></asp:RangeValidator>
</td>
<tdclass="style2"> </td>
<td> </td>
</tr>
<tr>
<tdclass="style5">
</td>
<tdclass="style3">
</td>
<tdclass="style4">
</td>
<tdclass="style2">
</td>
<td>
</td>
</tr>
<tr>
<tdclass="style5">
</td>
<tdclass="style3">
Distance</td>
<tdclass="style4">
<asp:TextBoxID="txtdistance"runat="server"AutoPostBack="True"CausesValidation="True"Width="49px"></asp:TextBox>
</td>
<tdclass="style2">
<asp:RadioButtonListID="radio5"runat="server"AutoPostBack="True">
<asp:ListItemID="option9"runat="server"value="Miles"/>
<asp:ListItemID="option10"runat="server"value="Kilometers"/>
</asp:RadioButtonList>
</td>
<td>
<asp:LabelID="lbldistanceResult"runat="server"></asp:Label>
</td>
</tr>
<tr>
<tdclass="style5">
</td>
<tdclass="style3">
</td>
<tdclass="style4">
<asp:RangeValidatorID="RangeValidator5"runat="server"ControlToValidate="txtdistance"ErrorMessage="Please enter a valid number"MaximumValue="1000"MinimumValue="0"Type="Double"></asp:RangeValidator>
</td>
<tdclass="style2">
</td>
<td>
</td>
</tr>
<tr>
<tdclass="style5">
</td>
<tdclass="style3">
</td>
<tdclass="style4">
</td>
<tdclass="style2">
</td>
<td>
</td>
</tr>
<tr>
<tdclass="style5">
</td>
<tdclass="style3">
Cooking</td>
<tdclass="style4">
<asp:TextBoxID="txtcooking"runat="server"AutoPostBack="True"CausesValidation="True"Width="49px"></asp:TextBox>
</td>
<tdclass="style2">
<asp:RadioButtonListID="radio6"runat="server"AutoPostBack="True">
<asp:ListItemID="option11"runat="server"value="Cups"/>
<asp:ListItemID="option12"runat="server"value="Milliliters"/>
</asp:RadioButtonList>
</td>
<td>
<asp:LabelID="lblcookingResult"runat="server"></asp:Label>
</td>
</tr>
<tr>
<tdclass="style5">
</td>
<tdclass="style3">
</td>
<tdclass="style4">
<asp:RangeValidatorID="RangeValidator6"runat="server"ControlToValidate="txtcooking"ErrorMessage="Please enter a valid number"MaximumValue="1000"MinimumValue="0"Type="Double"></asp:RangeValidator>
</td>
<tdclass="style2">
</td>
<td>
</td>
</tr>
</table>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Content>
Page behind:
Code:
ProtectedSub radio1_SelectedIndexChanged(ByVal sender AsObject, ByVal e As System.EventArgs) Handles radio1.SelectedIndexChanged
If Page.IsValid Then
If radio1.SelectedItem.ToString = "Dollars"Then
Dim result AsSingle = 0
Dim crate AsSingle = 0.7836
Dim currency AsSingle = Convert.ToSingle(txtcurrency.Text)
result = currency * crate
lblcurrencyResult.Text = System.Math.Round(Convert.ToDecimal(result), 2) & " €"
ElseIf radio1.SelectedItem.ToString = "Euros"Then
Dim result AsSingle = 0
Dim crate AsSingle = 1.2762
Dim currency AsSingle = Convert.ToSingle(txtcurrency.Text)
result = currency * crate
lblcurrencyResult.Text = "$ " & System.Math.Round(Convert.ToDecimal(result), 2)
Else
lblcurrencyResult.Text = ""
EndIf
EndIf
EndSub
ProtectedSub radio2_SelectedIndexChanged(ByVal sender AsObject, ByVal e As System.EventArgs) Handles radio2.SelectedIndexChanged
If Page.IsValid Then
If radio2.SelectedItem.ToString = "° Fahrenheit"Then
Dim result AsSingle = 0
Dim temp AsSingle = Convert.ToSingle(txttemp.Text)
result = (temp - 32) * 5 / 9
lbltempResult.Text = System.Math.Round(result) & " ° Celcius"
ElseIf Page.IsValid AndAlso radio2.SelectedItem.ToString = "° Celcius"Then
Dim result AsSingle = 0
Dim temp AsSingle = Convert.ToSingle(txttemp.Text)
result = (temp * 9 / 5) + 32
lbltempResult.Text = System.Math.Round(result) & " ° Fahrenheit"
Else
lbltempResult.Text = ""
EndIf
EndIf
EndSub
ProtectedSub radio3_SelectedIndexChanged(ByVal sender AsObject, ByVal e As System.EventArgs) Handles radio3.SelectedIndexChanged
If Page.IsValid Then
If radio3.SelectedItem.ToString = "Pounds"Then
Dim result AsSingle = 0
Dim weight AsSingle = Convert.ToSingle(txtweight.Text)
result = weight * (0.45359)
lblweightResult.Text = System.Math.Round(result, 1) & " Kilos"
ElseIf Page.IsValid AndAlso radio3.SelectedItem.ToString = "Kilos"Then
Dim result AsSingle = 0
Dim weight AsSingle = Convert.ToSingle(txtweight.Text)
result = weight * 2.2046
lblweightResult.Text = System.Math.Round(result, 1) & " Pounds"
Else
lblweightResult.Text = ""
EndIf
EndIf
EndSub
ProtectedSub radio4_SelectedIndexChanged(ByVal sender AsObject, ByVal e As System.EventArgs) Handles radio4.SelectedIndexChanged
If Page.IsValid Then
If radio4.SelectedItem.ToString = "Inches"Then
Dim result AsSingle = 0
Dim height AsSingle = Convert.ToSingle(txtheight.Text)
result = height * 0.0254
lblheightResult.Text = System.Math.Round(result, 2) & " Meters"
ElseIf Page.IsValid AndAlso radio4.SelectedItem.ToString = "Meters"Then
Dim result AsSingle = 0
Dim height AsSingle = Convert.ToSingle(txtheight.Text)
result = height * 39.37
lblheightResult.Text = System.Math.Round(result, 1) & " Inches"
Else
lblheightResult.Text = ""
EndIf
EndIf
EndSub
ProtectedSub radio5_SelectedIndexChanged(ByVal sender AsObject, ByVal e As System.EventArgs) Handles radio5.SelectedIndexChanged
If Page.IsValid Then
If radio5.SelectedItem.ToString = "Miles"Then
Dim result AsSingle = 0
Dim distance AsSingle = Convert.ToSingle(txtdistance.Text)
result = distance * 1.60934
lbldistanceResult.Text = System.Math.Round(result, 2) & " Kilometers"
ElseIf Page.IsValid AndAlso radio5.SelectedItem.ToString = "Kilometers"Then
Dim result AsSingle = 0
Dim distance AsSingle = Convert.ToSingle(txtdistance.Text)
result = distance * 0.62
lbldistanceResult.Text = System.Math.Round(result, 2) & " Miles"
Else
lbldistanceResult.Text = ""
EndIf
EndIf
EndSub
ProtectedSub radio6_SelectedIndexChanged(ByVal sender AsObject, ByVal e As System.EventArgs) Handles radio6.SelectedIndexChanged
If Page.IsValid Then
If radio6.SelectedItem.ToString = "Cups"Then
Dim result AsSingle = 0
Dim cooking AsSingle = Convert.ToSingle(txtcooking.Text)
result = cooking * 236.5882
lblcookingResult.Text = System.Math.Round(result, 2) & " Milliliters"
ElseIf Page.IsValid AndAlso radio6.SelectedItem.ToString = "Milliliters"Then
Dim result AsSingle = 0
Dim cooking AsSingle = Convert.ToSingle(txtcooking.Text)
result = cooking * 0.00423675
lblcookingResult.Text = System.Math.Round(result, 3) & " Cups"
Else
lblcookingResult.Text = ""
EndIf
EndIf
EndSub
EndClass
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March 27th, 2009, 01:47 PM
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Wrox Author
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Join Date: Jun 2003
Posts: 17,089
Thanks: 80
Thanked 1,576 Times in 1,552 Posts
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Can you repost the code and click the Remove Text Formatting button first? It's quite impossible to read the code now...
Imar
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March 27th, 2009, 01:59 PM
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Wrox Author
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Join Date: Jun 2003
Posts: 17,089
Thanks: 80
Thanked 1,576 Times in 1,552 Posts
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BTW: if you set a breakpoint in the server side handler, does it get hit the first time you click the control?
Imar
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March 30th, 2009, 05:35 AM
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Authorized User
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Join Date: Jan 2009
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Sorry, is this better:
Code:
asp:ContentID="Content2"ContentPlaceHolderID="cpMainContent"Runat="Server">
<asp:UpdatePanelID="UpdatePanel1"runat="server">
<ContentTemplate>
<tablewidth="100%">
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
</td>
<tdclass="style4">Value</td>
<tdclass="style2">Unit of Measurement</td>
<td>Converted Value</td>
</tr>
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
Currency</td>
<tdclass="style4">
<asp:TextBoxID="txtcurrency"runat="server"AutoPostBack="True"
CausesValidation="True"Width="49px"style="margin-left: 0px"></asp:TextBox>
</td>
<tdclass="style2">
<asp:radiobuttonlistid="radio1"runat="server"
AutoPostBack="True"CausesValidation="True">
<asp:listitemid="option1"runat="server"value="Dollars"/>
<asp:listitemid="option2"runat="server"value="Euros"/>
</asp:radiobuttonlist></td>
<td><asp:LabelID="lblcurrencyResult"runat="server"></asp:Label></td>
</tr>
<tr>
<tdclass="style5"> </td>
<tdclass="style3">
</td>
<tdclass="style1"colspan="2">
<asp:RangeValidatorID="RangeValidator1"runat="server"
ControlToValidate="txtcurrency"ErrorMessage="Please enter a valid number"
MaximumValue="1000000"MinimumValue="0"Type="Double"></asp:RangeValidator>
</td></tr>
</table>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Content>
Code Behind Page
Code:
Protected Sub radio1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles radio1.SelectedIndexChanged
If Page.IsValid Then
If radio1.SelectedItem.ToString = "Dollars" Then
Dim result As Single = 0
Dim crate As Single = 0.7836
Dim currency As Single = Convert.ToSingle(txtcurrency.Text)
result = currency * crate
lblcurrencyResult.Text = System.Math.Round(Convert.ToDecimal(result), 2) & " €"
ElseIf radio1.SelectedItem.ToString = "Euros" Then
Dim result As Single = 0
Dim crate As Single = 1.2762
Dim currency As Single = Convert.ToSingle(txtcurrency.Text)
result = currency * crate
lblcurrencyResult.Text = "$ " & System.Math.Round(Convert.ToDecimal(result), 2)
Else
lblcurrencyResult.Text = ""
End If
End If
End Sub
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March 30th, 2009, 01:30 PM
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Wrox Author
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Join Date: Jun 2003
Posts: 17,089
Thanks: 80
Thanked 1,576 Times in 1,552 Posts
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Not really. As you can see in the ASPX, all code is glued together, without any spaces. It's a stupid bug in this forum. To work around it, paste the code in notepad first, then copy and paste it again here and wrap it in code tags
Did you try setting a breakpoint? What was the outcome of that?
Imar
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March 31st, 2009, 11:50 AM
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Authorized User
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Join Date: Jan 2009
Posts: 51
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I set the breakpoint and when the page loaded it seemed to work fine. Now that I have removed the breakpoint, it continues to work fine. Wierd. As you can see, I will need to update the conversion rate daily. Without paying for an update service, what is the best way to update the rates? I have thought about creating a txt document that I could upload to the server each day to give the results. Do you have any suggestions?
Thank you very much for all of your help.
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