<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Asp.net Bind Data to Dropdownlist in inside of gridview</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="gvUserInfo" runat="server" AutoGenerateColumns="false"OnRowDataBound="gvUserInfo_RowDataBound" >
<HeaderStyle BackColor="#df5015" Font-Bold="true" ForeColor="White" />
<Columns>
<asp:BoundField DataField="CountryId" HeaderText="CountryId" />
<asp:BoundField DataField="CountryName" HeaderText="CountryName" />
<asp:TemplateField HeaderText="Location">
<ItemTemplate>
<asp:DropDownList ID="ddlCity" runat="server" Width="100px"/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>
//---------
using System;
using System.Data;
using System.Data.SqlClient;
using System.Web.UI;
using System.Web.UI.WebControls;
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After that add following code in code behind
SqlConnection con =new SqlConnection("Data Source=SureshDasari;Integrated Security=true;Initial Catalog=MySampleDB");
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindGridview();
}
}
// This method is used to bind gridview from database
protected void BindGridview()
{
con.Open();
SqlCommand cmd = new SqlCommand("select TOP 4 CountryId,CountryName from Country", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
con.Close();
gvUserInfo.DataSource = ds;
gvUserInfo.DataBind();
}
protected void gvUserInfo_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
con.Open();
var ddl = (DropDownList)e.Row.FindControl("ddlCity");
int CountryId = Convert.ToInt32(e.Row.Cells[0].Text);
SqlCommand cmd = new SqlCommand("select * from State where CountryID=" + CountryId, con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
con.Close();
ddl.DataSource = ds;
ddl.DataTextField = "StateName";
ddl.DataValueField = "StateID";
ddl.DataBind();
ddl.Items.Insert(0, new ListItem("--Select--", "0"));
}
}
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