To Open a page in new tab

ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "New Window", "javascript:window.open('Thanks.aspx')", true);

make hyperlink open in new tab

just insert target="_blank" in that tag like this:

asp:HyperLink ID="hyp" NavigateUrl="~/aboutus.aspx" runat="server" Text="click" Target="_blank"> asp:HyperLink>

Selecting Grid Value in RowEditing , RowDeleting,SelectedIndexChanging ് Event

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
string str = GridView1.Rows[e.NewEditIndex].Cells[1].Text;
}


RowDeleting
------------------------------
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
string str = GridView1.Rows[e.RowIndex].Cells[1].Text;
}


SelectedIndexChanging Event
----------------------------
protected void GridView1_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
{
string str = GridView1.Rows[e.NewSelectedIndex].Cells[1].Text;
}

To get Grid Selected RowIndex and Template Controls in DropDownList SelectedIndex Event

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
GridViewRow row = ((DropDownList)sender).Parent.Parent as GridViewRow;

int gvrO = Convert.ToInt32(row.RowIndex);

DropDownList ddltest = new DropDownList();
ddltest = (DropDownList)row.FindControl("ddlTest");
string ss = ddltest.SelectedItem.Text;
}

Find Grid Template Controls in Template Combo SelectedIndexChange Event

foreach (GridViewRow gvrow in GridView1.Rows )
{
DropDownList ddltest = new DropDownList();
ddltest = (DropDownList)gvrow.FindControl("ddlTest");
string ss = ddltest.SelectedItem.Text;
}

Preventing browser back button functionality

In page load event ,b4 if(!ispostback) checking
------------------------------------------------

public void AvoidCache()

{

Response.Cache.SetNoStore();

Response.Cache.SetExpires(DateTime.Now.AddSeconds(-1));

Response.Cache.SetCacheability(HttpCacheability.NoCache);

Response.Cache.SetValidUntilExpires(false);

}





OR





put this code in B4 the header tag in Default.aspx page.

------------------------------------------------------------



script type = "text/javascript" > //script for preventing browser back button functionality(Akbar)

function preventBack() { window.history.forward(); }

setTimeout("preventBack()", 0);

window.onunload = function() { null };

/script>