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System.InvalidCastException On Server


System.InvalidCastException On Server

By : user2949489
Date : November 17 2020, 01:00 AM
help you fix your problem The line int valido = (int)r.Field("valido"); is causing the error, right?
Your database allows this field to be nullable. So this may be the problem. When you encounter a record with a null-valido, the cast isn't possible.
code :
foreach(DataRow r in dt.Rows)
{
    int valido = r.IsNull("valido") ? 0 : r.Field<int>("valido");
    r["validacao"] = Adesao.GetValidacao(valido, conexao);
    r["dataFormatada"] = Utilidades.FormatarData(r.Field<DateTime>("data_criacao"));
}


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System.InvalidCastException: Unable to cast object of type 'System.Xml.XmlDocument

System.InvalidCastException: Unable to cast object of type 'System.Xml.XmlDocument


By : Poly
Date : March 29 2020, 07:55 AM
wish helps you My best guess for the reason of this error is that you rely on the order of the deserialized objects in the col ObjectArray. This is not guaranteed.
Probably, in a simplistic representation, your ObjectArray.Deserialize method looks like this:
code :
public static ObjectArray Deserialize(string xml, Type type)
{
    var s = new XmlSerializer(typeof(ObjectArray),
        new Type[] { type });
    var o = (ObjectArray)s.Deserialize(new StringReader(xml));
    return o;
}
public static ObjectArray Deserialize(string xml, Type[] types)
{
    var s = new XmlSerializer(typeof(ObjectArray), types);
    var o = (ObjectArray)s.Deserialize(new StringReader(xml));
    return o;
}
ObjectArray col = ObjectArray.Deserialize(xml, 
    new Type[] { typeof(DataModelObject), typeof(ViewObjectInfo) }
    );
dmo = (DataModelObject)col.OfType<DataModelObject>().Skip(i).First();
dmo = (DataModelObject)col[i];
dmo = (DataModelObject)col.OfType<DataModelObject>().Skip(i).First();
System.InvalidCastException trying to build a COM client and a COM server in C#

System.InvalidCastException trying to build a COM client and a COM server in C#


By : Vijay
Date : March 29 2020, 07:55 AM
Hope that helps I'm trying to build a COM client which has to instantiate a in-process COM server in C#. I made two C# projects: one for the client and one for the server. Both projects use x86 target platform and the latter has the option "Register for COM interop" setted. I'm using Visual Studio 2013 on a 64bit Windows 7 and compiling with .net 4. ,
throws an InvalidCastException HResult=-2147467262.
System.InvalidCastException when getting SQL Server ROWVERSION into System.Data.Linq.Binary property

System.InvalidCastException when getting SQL Server ROWVERSION into System.Data.Linq.Binary property


By : user3755557
Date : March 29 2020, 07:55 AM
may help you . After looking through many posts here and there I found the solution which is:
ItemProvider.cs replace:
code :
(byte[])Reader["Version"])
new Binary((byte[])Reader["Version"])
"System.InvalidCastException" error when retrieving data from SQL Server 2012 Express

"System.InvalidCastException" error when retrieving data from SQL Server 2012 Express


By : Stompo
Date : March 29 2020, 07:55 AM
Any of those help I am trying to test a method that retrieves some info from a SQL Server 2012 Express instance and "adds" it into a list. The problem is that when I try to run the test I get the error:
code :
DBConnections db = new DBConnections(DbConfig.conStr);
db.UpdateCmd("SELECT * FROM freelancers_references");
SqlDataReader dr = db.ExecuteReader();
if (dr.HasRows) {
    lst = dr.OfType<IDataRecord>().Select(r =>
        new Reference {
            Id = (int)dr["id"],
            OwnerId = (int)dr["owner_id"],
            Name = (string)dr["name"],
            Active = (bool)dr["active"]
        }).ToList();
}
dr.Close();
System.InvalidCastException: 'Unable to cast object of type 'System.Windows.Controls.TextBox' to type 'System.IConvertib

System.InvalidCastException: 'Unable to cast object of type 'System.Windows.Controls.TextBox' to type 'System.IConvertib


By : user2242862
Date : March 29 2020, 07:55 AM
will be helpful for those in need You need to reference the text property rather than the textbox itself.
Try changing this:
code :
TotalHere.TotalNumbers = Convert.ToDouble(textbox3);
TotalHere.TotalNumbers = Convert.ToDouble(textbox3.Text);
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