public void FillDistrict()
{
DataTable dt = new DataTable();
LoginUserTableAdapter gt = new LoginUserTableAdapter();
dt = gt.GetDistrictByState(" ");
District_ddl.DataSource = dt;
District_ddl.DataValueField = "DistrictID";
District_ddl.DataTextField = "DistrictName";
District_ddl.DataBind();
ListItem lit = new ListItem("--select---", "-1");
District_ddl.Items.Insert(0, lit);
}
protected void State_ddl_SelectedIndexChanged(object sender, EventArgs e)
{
DataTable dt = new DataTable();
LoginUserTableAdapter gt = new LoginUserTableAdapter();
string guid = State_ddl.SelectedValue;
dt = gt.GetDistrictByState(guid);
District_ddl.DataSource = dt;
District_ddl.DataValueField = "DistrictID";
District_ddl.DataTextField = "DistrictName";
District_ddl.DataBind();
ListItem lit = new ListItem("--select---", "-1");
District_ddl.Items.Insert(0, lit);
Page.MaintainScrollPositionOnPostBack = true;
}
protected void Stategrd_ddl_SelectedIndexChanged(object sender, EventArgs e)
{
GridViewRow gvr = (GridViewRow)((DropDownList)sender).Parent.Parent; //finding which row has fired dropdownlist event
DropDownList ddl = (DropDownList)sender; //converting to dropdownlist
DropDownList Ddlsecond = gvr.FindControl("Districtgrd_ddl") as DropDownList;
DropDownList State = (DropDownList)sender; //converting to dropdownlist
DropDownList DdlFirst = gvr.FindControl("Stategrd_ddl") as DropDownList;
DataTable dt = new DataTable();
LoginUserTableAdapter gt = new LoginUserTableAdapter();
string guid = DdlFirst.SelectedValue;
dt = gt.GetDistrictByState(guid);
Ddlsecond.DataSource = dt;
Ddlsecond.DataValueField = "DistrictID";
Ddlsecond.DataTextField = "DistrictName";
Ddlsecond.DataBind();
ListItem lit = new ListItem("--select---", "-1");
Ddlsecond.Items.Insert(0, lit);
}