hi i am adding data from textboxes to my gridview locally not from database. its like a salepage where a salesman is saling a product. now i want to delete a row from that gridview but i always got exception while deleting. kindly help me with that. here is my code where im getting the data and storing that in gridview. thanks.
DataTable dt1 = new DataTable();
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
gridVIEWData();
GridView1.DataSource = dt1;
GridView1.DataBind();
}
private void gridVIEWData()
{
dt1.Columns.Add("pName", typeof(string));
dt1.Columns.Add("pCategory", typeof(string));
dt1.Columns.Add("price", typeof(string));
dt1.Columns.Add("pQuantity", typeof(string));
dt1.Columns.Add("totalPrice", typeof(string));
Session["dtInSession"] = dt1; //Saving Datatable To Session
}
protected void Button3_Click(object sender, EventArgs e)
{
if (Session["dtInSession"] != null)
dt1 = (DataTable)Session["dtInSession"]; //Getting datatable from session
Int32 total = Convert.ToInt32(txt_quantity.Text) * Convert.ToInt32(txt_price.Text);
DataRow dr = dt1.NewRow();
dr["pName"] = DropDownList2.SelectedItem;
dr["pCategory"] = DropDownList1.SelectedItem;
dr["price"] = txt_price.Text;
dr["pQuantity"] = txt_quantity.Text;
dr["totalPrice"] = total;
dt1.Rows.Add(dr);
Session["dtInSession"] = dt1; //Saving Datatable To Session
GridView1.DataSource = dt1;
GridView1.DataBind();
}
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
// string value = GridView1.DataKeys[e.RowIndex].Values["price"].ToString();
//GridView1.DeleteRow(Convert.ToInt32(value));
//GridView1.DeleteRow(GridView1.SelectedIndex);
// dt1.Rows.RemoveAt(GridView1.SelectedIndex);
Int32 index = GridView1.SelectedIndex;
GridView1.DeleteRow(index);
}
Just to align with your code,
Method1 :
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
if (Session["dtInSession"] != null)
dt1 = (DataTable)Session["dtInSession"];
Int32 index = GridView1.SelectedIndex;
dt1 = dt1.Rows[index].Delete();
dt1.AcceptChanges();
Session["dtInSession"] = dt1; //Saving Datatable To Session
GridView1.DataSource = dt1;
GridView1.DataBind();
}
Method 2:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="pName" onselectedindexchanged="GridView1_SelectedIndexChanged">
and
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
string _pName = Convert.ToString(GridView1.SelectedDataKey.Value);
// Once you get the pName you can query from DataTable and Delete the row which the pName = _pName
// BindGrid and Store DataTable in session.
}
This may helps you.
protected void gvDetails_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
if (ViewState["CurrentTable"] != null)
dt = (DataTable)ViewState["CurrentTable"];
if (dt.Rows.Count > 0)
{
int Index = Convert.ToInt32(gvDetails.DataKeys[e.RowIndex].Values["Pk"].ToString());
dt.Rows.Cast<DataRow>().Where(o => o.Field<Int32>("Pk").Equals(Index)).FirstOrDefault().Delete();
// dt.Rows.RemoveAt(Index-1);
gvDetails.DataSource = dt;
gvDetails.DataBind();
}
}
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