ViewState with example in asp.net C#

Thursday, January 6, 2011

How to set Selected Value of dropdownList inside the GridView using asp.net C#



Step1:-

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" 
             DataKeyNames="EmpID" onrowdatabound="GridView1_RowDataBound">
          <Columns>
          <asp:TemplateField  HeaderText="SetEno">
          <ItemTemplate>
          <asp:DropDownList ID="ddlEmpid" runat="server" Width="90%" DataSourceID="SqlDataSource1" DataTextField="EMPID" 
                                DataValueField="EMPID"  >
          </asp:DropDownList>
          </ItemTemplate>               
          
          </asp:TemplateField>
       <asp:TemplateField HeaderText="Empid" Visible="false">
          <ItemTemplate>
          <asp:Label ID="lblEmpNo" runat="server" Text='<%# Eval("EmpNo") %>' />
          </ItemTemplate>
          </asp:TemplateField>
            <asp:BoundField DataField="EMPID" HeaderText="EmployeeID" ReadOnly="true"  />
            <asp:BoundField DataField="FirstName" HeaderText="FirstName" />
            <asp:BoundField DataField="LastName" HeaderText="LastName" />
            <asp:BoundField DataField="Address" HeaderText="Address" />
            <asp:BoundField DataField="Mobile" HeaderText="Mobile" />
                   
          </Columns>
        </asp:GridView>
Step2:-

    <asp:SqlDataSource ID="SqlDataSource1" runat="server"  ConnectionString="<%$ ConnectionStrings:mycon %>"
                SelectCommand="SELECT [EMPID] FROM EMPLOYEEID"></asp:SqlDataSource>
    
step3:-



public partial class GridViewDropDown : System.Web.UI.Page
{
    SqlConnection con;
    protected void Page_Load(object sender, EventArgs e)
    {
        string conection;
        conection = System.Configuration.ConfigurationManager.ConnectionStrings["mycon"].ConnectionString.ToString();
        con = new SqlConnection(conection);
      
            FillGrid();
         }
    protected void FillGrid()
    {
        SqlCommand cmd = new SqlCommand("select * from employee", con);
        con.Open();
        GridView1.DataSource = cmd.ExecuteReader();
        GridView1.DataBind();
        con.Close();
    }


    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {               
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            DropDownList ddl = (DropDownList)e.Row.FindControl("ddlEmpid");
            Label lblEmpid = ((Label)e.Row.FindControl("lblEmpNo"));
          //  string y = (String)DataBinder.Eval(e.Row.DataItem, "FirstName");
            string x=lblEmpid.Text.ToString().Trim();
            ddl.SelectedValue = x;
        }
    }
    
}

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