Two Comboboxes Error handling

[berto]

Example

I have two Comboboxes:

<telerik:RadComboBox ID="ddlPatientSuchwort2" Runat="server" Culture="de-DE"

  DataSourceID="sqlWinacsPatientSuchwort" DataTextField="Suchwort"

  DataValueField="PublicNummer" AutoPostBack="True"

  EnableAutomaticLoadOnDemand="True"

  onselectedindexchanged="ddlPatientSuchwort2_SelectedIndexChanged"

  filter="StartsWith" EmptyMessage="Patient Name" Skin="WebBlue"

  EnableVirtualScrolling="True" ItemsPerRequest="10"

    ShowMoreResultsBox="True" >

</telerik:RadComboBox>

 

<telerik:RadComboBox ID="ddlPublicNummer2" Runat="server" Culture="de-DE"

  DataSourceID="sqlWinacsPatientPublicNummer" DataTextField="PublicNummer"

  DataValueField="PublicNummer" AutoPostBack="True"

  EnableAutomaticLoadOnDemand="True"

  onselectedindexchanged="ddlPublicNummer2_SelectedIndexChanged"

  EmptyMessage="Patient Nummer" Label="oder" Skin="WebBlue"

  EnableVirtualScrolling="True" ItemsPerRequest="10"

    ShowMoreResultsBox="True" >

</telerik:RadComboBox>

protected void ddlPatientSuchwort2_SelectedIndexChanged(object sender, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e)
 {
     int varPatient = int.Parse(ddlPatientSuchwort2.SelectedValue);

         ddlPublicNummer2.Text = "";
         ddlPublicNummer2.ClearSelection();
         this.getWinacsPatient(varPatient);

 }

 protected void ddlPublicNummer2_SelectedIndexChanged(object sender, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e)
 {
     int varPatient = int.Parse(ddlPublicNummer2.SelectedValue);

         ddlPatientSuchwort2.Text = "";
         ddlPatientSuchwort2.ClearSelection();
         this.getWinacsPatient(varPatient);

 }

Everything works fine when I select value. The problem happens
when I write something in Combobox and don't choose value
showed but click somwhere on the screen I got then:

Server Error in '/Abrechnung' Application.

---

Input string was not in a correct format.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.FormatException: Input string was not in a correct format.

Source Error:

Line 90: protected void ddlPublicNummer2_SelectedIndexChanged(object sender, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e) Line 91: { Line 92: int varPatient = int.Parse(ddlPublicNummer2.SelectedValue); Line 93: Line 94: ddlPatientSuchwort2.Text = "";

Source File: d:\Dev\Abrechnung\Default.aspx.cs    Line: 92

Stack Trace:

[FormatException: Input string was not in a correct format.] System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +9595563 System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +119 System.Int32.Parse(String s) +23 _Default.ddlPublicNummer2_SelectedIndexChanged(Object sender, RadComboBoxSelectedIndexChangedEventArgs e) in d:\Dev\Abrechnung\Default.aspx.cs:92 Telerik.Web.UI.RadComboBox.OnSelectedIndexChanged() +215 Telerik.Web.UI.RadComboBox.RaisePostDataChangedEvent() +63 Telerik.Web.UI.RadDataBoundControl.System.Web.UI.IPostBackDataHandler.RaisePostDataChangedEvent() +34 System.Web.UI.Page.RaiseChangedEvents() +134 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5201

---

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1008

Any idea how I can handle this exceptions?

[A2H]

Hello,

The reason for the error is when you load the data from data source, “DataValueField” and “DataTextField” is populated correctly.  However, when you type some random value, there is no DataValue for that particular option and in the selected index changed event RadComboBox’s  Datavalue will be null, hence system will throw error. 

One suggestion is to check the “DataValueField” for null values before you parse it like given below. 

protected void ddlPublicNummer2_SelectedIndexChanged(object sender, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e)
    {
        if (ddlPublicNummer2.SelectedValue != "")
        {
            int varPatient = int.Parse(ddlPublicNummer2.SelectedValue);
        }

        ddlPatientSuchwort2.Text = "";
        ddlPatientSuchwort2.ClearSelection();
        this.getWinacsPatient(varPatient);

    }

[berto]

Thank you for your quick help. Now I am getting following:

Fehler    8    The name 'varPatient' does not exist in the current context    d:\Dev\Abrechnung\Default.aspx.cs    88    33    d:\Dev\Abrechnung\

[A2H]

Hi,

I apologize for providing you wrong code.

Please modify your code like this

protected void ddlPublicNummer2_SelectedIndexChanged(object sender, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e)
   {
       int varPatient = 0;
       if (ddlPublicNummer2.SelectedValue != "")
       {
           varPatient = int.Parse(ddlPublicNummer2.SelectedValue);
       }

       ddlPatientSuchwort2.Text = "";
       ddlPatientSuchwort2.ClearSelection();
       this.getWinacsPatient(varPatient);

   }

Thanks,
A2H

[berto]

Server Error in '/Abrechnung' Application.
--------------------------------------------------------------------------------

Input string was not in a correct format.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.FormatException: Input string was not in a correct format.

Source Error:


Line 60:       notPauschale = int.Parse(rbAPKnot.SelectedValue);
Line 61:
Line 62:       if (ddlPatientSuchwort2.Text != "") PatientNummer = int.Parse(ddlPatientSuchwort2.SelectedValue);
Line 63:       else if (ddlPublicNummer2.Text != "") PatientNummer = int.Parse(ddlPublicNummer2.SelectedValue);
Line 64:       else PatientNummer = 1;


Source File: d:\Dev\Abrechnung\Default.aspx.cs    Line: 62

Stack Trace:


[FormatException: Input string was not in a correct format.]
   System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +9595563
   System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +119
   System.Int32.Parse(String s) +23
   _Default.Page_Load(Object sender, EventArgs e) in d:\Dev\Abrechnung\Default.aspx.cs:62
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +91
   System.Web.UI.Control.LoadRecursive() +74
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207

Still getting this error. To reproduce when I click on Combo box I am getting list: Patien1, Patient2 etc... When I write only "Pat" I am getting this error.

[A2H]

Hello,

Can you please modify your code(line no 62 & 63) like this

if (ddlPatientSuchwort2.SelectedValue != "") PatientNummer = int.Parse(ddlPatientSuchwort2.SelectedValue);
else if (ddlPublicNummer2.SelectedValue != "") PatientNummer = int.Parse(ddlPublicNummer2.SelectedValue);

Let me know if you face any concern.

Thanks,
A2H