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a call to bind was not well formed ?

Posted on 2009-05-14
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Last Modified: 2013-11-08
I am trying to set the value  of a date when it is null from a different control but I get the following error : a call to bind was not well formed

-- error with this because of the conditional statement 

    <telerik:RadDatePicker  ID="radBillPeriodStartDate1" Skin="Office2007" Style="vertical-align: middle;"

                            runat="server" 

                            DbSelectedDate='<%# Bind("END_BILLING_PERIOD","{0:D}") == DBNull.Value ? radBillPeriodEndDate.SelectedDate : Bind("END_BILLING_PERIOD","{0:D}") %>'

                            >

                    

-- this works fine when there is no conditional statement 
 

     <telerik:RadDatePicker ID="radBillPeriodEndDate1"  Skin="Office2007" Style="vertical-align: middle;"

                            runat="server" DbSelectedDate='<%# Bind("END_BILLING_PERIOD", "{0:d}") %>'

                            >

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Question by:tech_question
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Assisted Solution

by:nmarun
nmarun earned 500 total points
ID: 24388945
See what happens when you try something like this:

    <telerik:RadDatePicker  ID="radBillPeriodStartDate1" Skin="Office2007" Style="vertical-align: middle;"
                            runat="server"
                            DbSelectedDate='<%# GetDateValue(Bind("END_BILLING_PERIOD","{0:D}").ToString()) %>'
                            >
and in the code-behind:

public DateTime GetDateValue(string endBillingPeriod)
{
      DateTime retValue;
      if(endBillingPeriod == null)
      {
           retValue = radBillPeriodEndDate.SelectedDate;
      }
      else
      {
            retValue = DateTime.Parse(endBillingPeriod);
       }
}
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Author Comment

by:tech_question
ID: 24389169
I changed it, I had to change the method type to protected but now it tells me CS0103: The name 'Bind' does not exist in the current context
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LVL 27

Expert Comment

by:nmarun
ID: 24390565
Try using Eval:

  <telerik:RadDatePicker  ID="radBillPeriodStartDate1" Skin="Office2007" Style="vertical-align: middle;" runat="server"
                            DbSelectedDate='<%# GetDateValue(Eval("END_BILLING_PERIOD","{0:D}").ToString()) %>' >
0
 

Author Comment

by:tech_question
ID: 24396301
I did this and it seems to work but now the problem is in add mode, when I insert an item , the value associated to it is null  - is there anything that I can try ?

DbSelectedDate='<%#GetDateValue(Convert.ToDateTime(DataBinder.Eval(Container.DataItem, "BEGIN_BILLING_PERIOD")))%>'
protected DateTime GetDateValue(DateTime d)

    {

        DateTime retValue;

        if (d == null)

        {

            retValue = DateTime.Parse(radBillPeriodEndDate.SelectedDate.ToString());

        }

        else

        {

            retValue = d;

            //Convert.ToDateTime(d, "{0:d}");

        }

        return retValue;

    }

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Expert Comment

by:nmarun
ID: 24397371
What do you mean by:
the value associated to it is null

What is 'it' here? Is it the radBillPeriodEndDate control?
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Author Comment

by:tech_question
ID: 24397741
it is the objectdatasource parameter that is bound to this control which is begin_billing_period.

  <asp:Parameter Name="BEGIN_BILLING_PERIOD" Type="DateTime" />
     
   <telerik:GridTemplateColumn HeaderText="Billing Period Start Date" UniqueName="BEGIN_BILLING_PERIOD"

                    EditFormColumnIndex="1">

                    <HeaderStyle Width="62px" />

                    <ItemTemplate>

                        <asp:Label runat="server" ID="lblBillingPeriodStartDate" Text='<%# Eval("BEGIN_BILLING_PERIOD", "{0:D}") %>'></asp:Label>

                    </ItemTemplate>

                    <EditItemTemplate>

                        <telerik:RadDatePicker  ID="radBillPeriodStartDate1" Skin="Office2007" Style="vertical-align: middle;"

                            runat="server"  DbSelectedDate='<%#GetDateValue(Convert.ToDateTime(DataBinder.Eval(Container.DataItem, "BEGIN_BILLING_PERIOD")))%>' 

                            MinDate='<%# DateTime.Now.AddMonths(Convert.ToInt32(ConfigurationManager.AppSettings["BillingMin"].ToString()))%>'

                            MaxDate='<%# DateTime.Now.AddMonths(Convert.ToInt32(ConfigurationManager.AppSettings["BillingMax"].ToString()))%>'

                            >

                        <Calendar ShowRowHeaders="false" />

                        </telerik:RadDatePicker>

                        <asp:RequiredFieldValidator ID="rfvBillPeriodstartDate" runat="server" ControlToValidate="radBillPeriodStartDate1"

                            ErrorMessage="Billing Period Start Date must be within the range of 18 months in the past or 2 months in the future">*</asp:RequiredFieldValidator>

                    </EditItemTemplate>

                </telerik:GridTemplateColumn>

             

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Expert Comment

by:nmarun
ID: 24400322
So what line is causing the break?
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Author Comment

by:tech_question
ID: 24400921
when I add a record, by default it picks up the calendar control's date which is perfect but then it is unable to bind the value to the object datasource parameter (end_billing_period) , which by default takes it as null (which is 01/01/0001 for a datetime value). when I hit save , the value that is going to the database is 01/01/0001 not the value entered by the user. Does it makes sense ?
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Accepted Solution

by:
nmarun earned 500 total points
ID: 24403102
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Author Comment

by:tech_question
ID: 24412759
thanks for pointing that article out. I looked at the article, it does not address my issue. If you look at the
code below      d = Convert.ToDateTime(radBillPeriodEndDate.SelectedDate); (I am not binding this value to the data. Is there any way to do this    
// DataBinder.Eval(dataItem, "BEGIN_BILLING_PERIOD") = radBillPeriodEndDate; ?
       
    protected DateTime GetDateString(object dataItem)

    {

        DateTime d ;

        

        if (DataBinder.Eval(dataItem, "BEGIN_BILLING_PERIOD") == DBNull.Value)

        {

           // DataBinder.Eval(dataItem, "BEGIN_BILLING_PERIOD") = radBillPeriodEndDate;

            d = Convert.ToDateTime(radBillPeriodEndDate.SelectedDate);

        }
 

        else

        {

            d = Convert.ToDateTime(DataBinder.Eval(dataItem, "BEGIN_BILLING_PERIOD"));

            

        }

        

        return d;

    }

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LVL 27

Expert Comment

by:nmarun
ID: 24414517
tech_questions,

I'm kinda lost of in this issue. Here's is where I stand right know:

When you add new record to your database, you are not entering a date value to the end billing date field. So when you are binding it to the gridview, it is showing 01/01/0001 date and you want to know if there is a way out of this. Am I right? If not, please provide details.
0
 

Author Comment

by:tech_question
ID: 24422360
thanks for the link, I did the below for one of those articles and it works like a champ. Thank you.
 protected void gridInvLines_ItemCommand(object source, GridCommandEventArgs e)

    {

        

            switch (e.CommandName)

            {
 

                case RadGrid.InitInsertCommandName:

                    e.Canceled = true;
 

                    //this is for the Calendar Date control

                    System.Collections.Specialized.ListDictionary newValues = new System.Collections.Specialized.ListDictionary();
 

                    if(radBillPeriodStartDate.SelectedDate.HasValue)

                          newValues["BEGIN_BILLING_PERIOD"] = Convert.ToDateTime(radBillPeriodStartDate.SelectedDate);

                    if(radBillPeriodEndDate.SelectedDate.HasValue)

                          newValues["END_BILLING_PERIOD"]   = Convert.ToDateTime(radBillPeriodEndDate.SelectedDate);
 

                    e.Item.OwnerTableView.InsertItem(newValues);
 

                    break;
 

                default:
 

                    break;

        }

    }

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