Question

I have a drop down list and I want the selected value to put into an int variable, then in my aspx page I want to assign it to a rowspan. This is my C# code for getting the value and converting it:

protected void drop_SelectedIndexChanged(object sender, EventArgs e)
        {
            int a = Int32.Parse(drop.SelectedValue.ToString());

And this is my aspx code where I’m trying to assign the variable a :

 <asp:TableHeaderRow>
 <asp:TableHeaderCell RowSpan="<% a %>">Hostese</asp:TableHeaderCell>
 </asp:TableHeaderRow>  

I get the error: cannot create an object of type int32 from its string representation. Can anyone say why? It’s an asp.net application with C#.

Answer 1

try setting this value when you read dropdown value.

<asp:TableHeaderRow>
    <asp:TableHeaderCell ID="h1" >Hostese</asp:TableHeaderCell>
</asp:TableHeaderRow> 



protected void drop_SelectedIndexChanged(object sender, EventArgs e)
{
    h1.RowSpan = Int32.Parse(drop.SelectedValue.ToString());