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POAdding new row to listview removes above selected dropdown Clearing
 

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    <p>When i add the new row to the List view above selected dropdownlist gets cleared .what is the reason for this problem plz suggest me </p> <pre><code>protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { FirstListViewRow(); BindDataToGridviewDropdownlist(); } } protected void BindDataToGridviewDropdownlist() { DataSet dsDept = new DataSet(); dsDept.ReadXml(Server.MapPath("XMLFile2.xml")); DataView dv = dsDept.Tables[0].DefaultView; foreach (var list in listview1.Items) { if (list.ItemType == ListViewItemType.DataItem) { DropDownList ddf = (DropDownList)list.FindControl("ddldatatype"); ddf.DataSource = dv; ddf.DataTextField = "value"; ddf.DataBind(); ddf.Items.Insert(0, new ListItem("--Select--", "0")); } } } private void FirstListViewRow() { DataTable dt = new DataTable(); DataRow dr = null; dt.Columns.Add(new DataColumn("OrderNo", typeof(string))); dt.Columns.Add(new DataColumn("ColumnTitle", typeof(string))); dt.Columns.Add(new DataColumn("Datatype", typeof(string))); dt.Columns.Add(new DataColumn("Examples", typeof(string))); dt.Columns.Add(new DataColumn("Options", typeof(string))); dt.Columns.Add(new DataColumn("Delete", typeof(string))); dr = dt.NewRow(); dt.Rows.Add(dr); dr["OrderNo"] = 1; Session["CurrentTable"] = dt; listview1.DataSource = dt; listview1.DataBind(); } private void AddNewRow() { int rowIndex = 0; if (Session["CurrentTable"] != null) { DataTable dtCurrentTable = (DataTable)Session["CurrentTable"]; DataRow drCurrentRow = null; if (dtCurrentTable.Rows.Count &gt; 0) { for (int i = 1; i &lt;= dtCurrentTable.Rows.Count; i++) { Label TextBoxorder = (Label)listview1.Items[rowIndex].FindControl("txtorder"); TextBox TextBoxcolumnname = (TextBox)listview1.Items[rowIndex].FindControl("txtcolumnname"); DropDownList DropDatatype = (DropDownList)listview1.Items[rowIndex].FindControl("ddldatatype"); DropDownList Dropexample = (DropDownList)listview1.Items[rowIndex].FindControl("ddlexamples"); TextBox TextBoxoptions = (TextBox)listview1.Items[rowIndex].FindControl("txtoptions"); CheckBox Checkdel = (CheckBox)listview1.Items[rowIndex].FindControl("chkdel"); drCurrentRow = dtCurrentTable.NewRow(); drCurrentRow["OrderNo"] = i + 1; // dtCurrentTable.Rows[i - 1]["Order"] = TextBoxorder.Text; dtCurrentTable.Rows[i - 1]["ColumnTitle"] = TextBoxcolumnname.Text; dtCurrentTable.Rows[i - 1]["Datatype"] = DropDatatype.Text; dtCurrentTable.Rows[i - 1]["Examples"] = Dropexample.Text; dtCurrentTable.Rows[i - 1]["Options"] = TextBoxoptions.Text; dtCurrentTable.Rows[i - 1]["Delete"] = Checkdel.Text; rowIndex++; } dtCurrentTable.Rows.Add(drCurrentRow); Session["CurrentTable"] = dtCurrentTable; listview1.DataSource = dtCurrentTable; listview1.DataBind(); Label txn = (Label)listview1.Items[rowIndex].FindControl("txtorder"); txn.Focus(); } } else { Response.Write("Session is null"); } BindDataToGridviewDropdownlist(); } protected void btnGenerate_Click(object sender, EventArgs e) { } protected void btnAdd_Click(object sender, EventArgs e) { AddNewRow(); } protected void btndelete_Click(object sender, EventArgs e) { DataTable dt = new DataTable(); if (Session["CurrentTable"] != null) { dt = (DataTable)Session["CurrentTable"]; int j = 0; for (int i = 0; i &lt; listview1.Items.Count; i++) { ListViewDataItem items = listview1.Items[i]; CheckBox chkBox = (CheckBox)items.FindControl("chkdel"); if (chkBox.Checked == true) { dt.Rows.RemoveAt(j); dt.AcceptChanges(); } else { j++; } } Session["CurrentTable"] = dt; listview1.DataSource = dt; listview1.DataBind(); BindDataToGridviewDropdownlist(); } } protected void btnClear_Click(object sender, EventArgs e) { listview1.Items.Clear(); } } } </code></pre>
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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