I have 3 listboxes.The listbox fetches two values by code-datatextfield
and datavaluefield
. 1st listbox transfers the datatextfield
items from 1st listbox to 2nd listbox.i want to transfer the datavaluefield
of selected 1st listbox items to 3rd listbox.
if (ListBox3.SelectedIndex >= 0
{
for (int i = 0; i < ListBox3.Items.Count; i++)
{
if (ListBox3.Items[i].Selected)
{
if (!arraylist1.Contains(ListBox3.Items[i]))
{
arraylist1.Add(ListBox3.Items[i]);
Session["value"] = ListBox3.Items[i];
}
}
}
for (int i = 0; i < arraylist1.Count; i++)
{
if (!ListBox2.Items.Contains(((ListItem)arraylist1[i])))
{
ListBox2.Items.Add(((ListItem)arraylist1[i]));
}
ListBox3.Items.Remove(((ListItem)arraylist1[i]));
}
ListBox2.SelectedIndex = -1;
}
else
{
}
SqlConnection con = new SqlConnection(strcon);
SqlCommand command = new SqlCommand("select * from IT_1_BOILER_DESK_1_PARAMETERS where paramtext='" + Session["value"] + "'", con);
SqlDataAdapter dataAadpter = new SqlDataAdapter(command);
DataSet ds = new DataSet();
dataAadpter.Fill(ds);
if (ds != null)
{
ListBox1.DataSource = ds.Tables[0];
ListBox1.DataTextField = "param";
//ListBox3.DataValueField = "param";
ListBox1.DataBind();
}
for listbox 3
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(strcon);
SqlCommand command = new SqlCommand("select * from IT_1_BOILER_DESK_1_PARAMETERS where pname='" + this.DropDownList1.SelectedValue + "'" ,con);
SqlDataAdapter dataAadpter = new SqlDataAdapter(command);
DataSet ds = new DataSet();
dataAadpter.Fill(ds);
if (ds != null)
{
ListBox3.DataSource = ds.Tables[0];
ListBox3.DataTextField = "paramtext";
ListBox3.DataValueField = "param";
ListBox3.DataBind();
}
}
But i want to display the datavaluefield of the items that are selected from listbox3 to listbox1
Since you want to show DataTextField value and DataValueField value from one listbox into 2 different listbox. I suggest you to use a different approach. This will also reduce usage of 2nd database call.
Try following:-
if (ListBox3.SelectedIndex >= 0)
{
for (int i = 0; i < ListBox3.Items.Count; i++)
{
if (ListBox3.Items[i].Selected)
{
if (!arraylist1.Contains(ListBox3.Items[i]))
{
arraylist1.Add(ListBox3.Items[i]);
//Session["value"] = ListBox3.Items[i]; no need of this
}
}
}
for (int i = 0; i < arraylist1.Count; i++)
{
if (ListBox2.Items.FindByText(((ListItem)arraylist1[i]).Text)==null)
{
//since you already have text and value field values in arrayList. Use them
ListBox2.Items.Add(new ListItem(((ListItem)arraylist1[i]).Text));
}
if (ListBox1.Items.FindByText(((ListItem)arraylist1[i]).Text)==null)
{
ListBox1.Items.Add(new ListItem((ListItem)arraylist1[i]).Value));
}
ListBox3.Items.Remove(((ListItem)arraylist1[i]));
}
ListBox2.SelectedIndex = -1;
}
else
{
}
/* This database call can be removed
SqlConnection con = new SqlConnection(strcon);
SqlCommand command = new SqlCommand("select * from IT_1_BOILER_DESK_1_PARAMETERS where paramtext='" + Session["value"] + "'", con);
SqlDataAdapter dataAadpter = new SqlDataAdapter(command);
DataSet ds = new DataSet();
dataAadpter.Fill(ds);
if (ds != null)
{
ListBox1.DataSource = ds.Tables[0];
ListBox1.DataTextField = "param";
//ListBox3.DataValueField = "param";
ListBox1.DataBind();
}*/
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