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  • Priority: Medium
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.net dropdown lists

Hi

I am having a problem with dropdownlists in .net 2.0. I bind the dropdownlist like this

    protected void Page_Load(object sender, EventArgs e)
    {
            this.LoadDivisions();
    }

    private void LoadDivisions()
    {
        Valiant.API.Interfaces.IDivision Division = new Valiant.API.Elements.Division();
        DataSet objDataSet = Division.GetDivisions();
        foreach (DataRow objRow in objDataSet.Tables[0].Rows)
        {
            ListItem objItem = new ListItem(objRow["DivisionName"].ToString(), objRow["DivisionID"].ToString());
            this.DropDownList1.Items.Add(objItem);
        }
    }


now on the button submit I would want to get the value.

    protected void btnSubmit_Click(object sender, EventArgs e)
    {
          int.Parse(this.DropDownList1.SelectedItem.Value);
   }

the selected item, is always null
0
Caroline_Swart
Asked:
Caroline_Swart
  • 2
1 Solution
 
Caroline_SwartAuthor Commented:
please note that this is in a user control
0
 
Arthur_WoodCommented:
why don't you DataBind to the control, like this:

    private void LoadDivisions()
    {
        Valiant.API.Interfaces.IDivision Division = new Valiant.API.Elements.Division();
        DataSet objDataSet = Division.GetDivisions();
        this.DropDownList1.DataSource = objDataSet;
        this.DropDownList1.DataBind();
    }
0
 
REA_ANDREWCommented:
it is because when you click the button you post back and then refill the drop down list thus erasing the selected item. to correct simply have this

    protected void Page_Load(object sender, EventArgs e)
    {
if(!IsPostBack)
{
            this.LoadDivisions();
}
    }
0
 
REA_ANDREWCommented:
this way the selected item is persisted through post back and there fore unless null to begin with will have a value for the selectedItem

:-)

Andrew
0
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