C# - Insert Newline Between The Items Of Dropdownlist?

May 15, 2010

I want give some space between the items of the dropdownlist. is it possible?

ddl:

item1
item2
item3

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[Code]......

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2-House_p Table

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[Code] ....

and SP

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[Code] ....

ok here I can insert 2 product succesfully. but when I want insert third produt it makes below error instead of showing error message

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Object cannot be cast from DBNull to other types.
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Line 805: _cmd.Parameters.AddWithValue("@behcode", data);
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Line 807: int ID = Convert.ToInt32(_cmd.ExecuteScalar()); Line 808: if (ID > 0)
Line 809: {

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ALL (manually insert)
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AMP
ABG
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how i handle this problem..Its in hidden filed.

Server Error in '/DentalClaimPrjt' Application.

Cannot have multiple items selected in a DropDownList.

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.Web.HttpException: Cannot have multiple items selected in a DropDownList.

Source Error: [Code]....

Line 85: function openPopup2(did)
Line 86: {
Line 87: var hdnClm1 = document.getElementById('<%=hdnCliamid.ClientID%>').value;
Line 88: window.location="Form.aspx?DeleteRSPid=" + did + "&Editid="+ hdnClm1;
Line 89: }

Source File: d:DentalClaimPrjtForm.aspx Line: 87 Stack Trace: [Code]....

[HttpException (0x80004005): Cannot have multiple items selected in a DropDownList.]
System.Web.UI.WebControls.DropDownList.VerifyMultiSelect() +106
System.Web.UI.WebControls.ListControl.RenderContents(HtmlTextWriter writer) +124

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[Code]....

[Code]....

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<asp:DropDownList ID="DropDownMake" runat="server"
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AppendDataBoundItems="True" EnableViewState="False" AutoPostBack="True">
<asp:ListItem Selected="True" Value="All">All</asp:ListItem>
</asp:DropDownList>
<asp:DropDownList ID="DropDownModel" runat="server"
AppendDataBoundItems="True" AutoPostBack="True" DataSourceID="SqlModels"
DataTextField="Model" DataValueField="Model" EnableViewState="False">
<asp:ListItem>All</asp:ListItem>
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<asp:SqlDataSource ID="SqlMakes" runat="server"
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[Code]....

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this is my code:

[Code]....

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