Server Error in '/' Application.

Conversion from type 'DBNull' to type 'String' is not valid.

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.InvalidCastException: Conversion from type 'DBNull' to type 'String' is not valid.

Source Error:


Line 104:                                        <h2 style="padding: 4px; margin: 1px">
Line 105:                                            <i class="fa fa-pencil-square"></i>
Line 106:                                            <asp:Label ID="NameLabel" runat="server" Text='<%# Kbdll.ConvertToFarsi(Eval("Title")) %>' Font-Bold="true" />
Line 107:                                        </h2>
Line 108:                                    </asp:HyperLink></ItemTemplate></asp:DataList></div><asp:ObjectDataSource ID="ObjectDataSource3" runat="server" OldValuesParameterFormatString="original_{0}"

Source File: C:\HostingSpaces\ketabcity.com\httpdocs\bookview.aspx    Line: 106

Stack Trace:


[InvalidCastException: Conversion from type 'DBNull' to type 'String' is not valid.]
   Microsoft.VisualBasic.CompilerServices.Conversions.ToString(Object Value) +1113
   ASP.bookview_aspx.__DataBinding__control9(Object sender, EventArgs e) in C:\HostingSpaces\ketabcity.com\httpdocs\bookview.aspx:106
   System.Web.UI.Control.OnDataBinding(EventArgs e) +100
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +178
   System.Web.UI.Control.DataBindChildren() +248
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +195
   System.Web.UI.Control.DataBindChildren() +248
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +195
   System.Web.UI.WebControls.DataList.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem) +175
   System.Web.UI.WebControls.DataList.CreateControlHierarchy(Boolean useDataSource) +885
   System.Web.UI.WebControls.BaseDataList.OnDataBinding(EventArgs e) +89
   System.Web.UI.WebControls.BaseDataList.EnsureDataBound() +86
   System.Web.UI.Control.EnsureChildControls() +107
   System.Web.UI.WebControls.DataList.get_Items() +49
   BookView.GetPublisherBookForScripte1(Int32& cc) +80
   BookView.GetMetaData(DataRow row) +4453
   BookView.Page_Load(Object sender, EventArgs e) +3369
   System.Web.UI.Control.OnLoad(EventArgs e) +108
   System.Web.UI.Control.LoadRecursive() +90
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1533


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4700.0