Тут дело в том, что мне в 1 событии надо присвоить уже от созданного элемента по выбору события, значение строковой переменной. Он пишет, что не задана ссылка на объект как быть ?
| Код |
static int masDDL = 30;
System.Web.UI.WebControls.DropDownList[] DDL= new System.Web.UI.WebControls.DropDownList[masDDL];
public struct DDL1
{
public int numberDDL;
public int left;
public int top;
}
public DDL1 ddl(int numberDDL, int left, int top,string query, string field, string idfield, ref System.EventHandler eh)
{
for (int i = 1; i < masDDL; i++)
{
DDL[i] = new System.Web.UI.WebControls.DropDownList();
}
DDL[numberDDL].Style["position"] = "absolute";
DDL[numberDDL].Style["top"] = Convert.ToString(top) + "pt";
DDL[numberDDL].Style["left"] = Convert.ToString(left + 5) + "pt";
DDL[numberDDL].Width = 130;
CreateControls.LABLES ccl = new CreateControls.LABLES();
ccl.obnov(DDL[numberDDL]);
ccl.spisok(query, "DefaultView", field, idfield, DDL[numberDDL]);
DDL[numberDDL].ID = "DDL" + Convert.ToString(numberDDL);
DDL[numberDDL].SelectedIndexChanged += new System.EventHandler(eh);
P1.Controls.Add(DDL[numberDDL]);
DDL1 ddl = new DDL1();
ddl.numberDDL = numberDDL;
ddl.top = top;
ddl.left = left;
return ddl;
}
protected void Page_Load(object sender, EventArgs e)
{
if (flag1==1)
{
System.EventHandler eh1 =new System.EventHandler(DDL_SelectedIndexChanged1);
ddl(1, 5, 5, "SELECT * FROM [o].[dbo].[VO] GO", "na", "id_o",ref eh1);
System.EventHandler eh2 =new System.EventHandler(DDL_SelectedIndexChanged2);
ddl(2, 140, 5, "SELECT * FROM [o].[dbo].[VO] GO", "nb", "id_o",ref eh2);
System.EventHandler eh3 =new System.EventHandler(DDL_SelectedIndexChanged3);
ddl(3, 280, 5, "SELECT * FROM [o].[dbo].[VO] GO", "nc", "id_o",ref eh3);
}
}
protected void DDL_SelectedIndexChanged1(object sender, EventArgs e)
{ string value;
value = this.DDL[1].SelectedItem.Text; // ошибка тут
}
protected void DDL_SelectedIndexChanged2(object sender, EventArgs e)
{ MessageBox.Show("Ошибка2!!!"); }
protected void DDL_SelectedIndexChanged3(object sender, EventArgs e)
{ MessageBox.Show("Ошибка3!!!"); }
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