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Sousa Pambo

Sousa Pambo

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Error during calculate C#

May 4 2015 5:35 AM
Hello Friends!
I need your help, I have a strnge error.....
 
private void cbDesMensalidade_SelectedValueChanged(object sender, EventArgs e)
{
if (cbDesMensalidade.SelectedIndex != -1)
{
this.tbValorDesc.Text = (nc.getValorAluno(tbRefCadastro.Text) - (nc.getValorAluno(this.tbRefCadastro.Text) * ((Convert.ToInt32(cbDesMensalidade.SelectedValue)) / 100))).ToString();
}
}
 
The error is "Unable to cast object of type 'RH_2013.DAL.CombAdd' to type 'System.IConvertible'." 
 
Please Help 

Answers (3)