retrive data from sql server 2000 via dropdown list in label [Resolved]

Posted by Saanjhi under ADO.NET on 10/2/2013 | Points: 10 | Views : 2615 | Status : [Member] | Replies : 3

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making a search panel want to show data in labels and text box via dropdownlist box and data retrieved from sql server 2000

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Posted by: Bandi on: 10/3/2013 [Member] [MVP] Platinum | Points: 50

0	Populate a Label and TextBox control based from the seselected value from the DropDownList : private void GetData(string ID) { DataTable dt = new DataTable(); SqlConnection connection = new SqlConnection("YOUR CONNECTION STRING HERE"); connection.Open(); SqlCommand sqlCmd = new SqlCommand("SELECT * FROM YourTable WHERE ID= @ID", connection); SqlDataAdapter sqlDa = new SqlDataAdapter(sqlCmd); sqlCmd.Parameters.AddWithValue("@ID",ID); sqlDa.Fill(dt); if (dt.Rows.Count > 0) { TextBox1.Text = dt.Rows[0]["ColumnName1"].ToString(); //Where ColumnName is the Field from the DB that you want to display Label1.Text = dt.Rows[0]["ColumnName2"].ToString(); } connection.Close(); } protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) { GetData(DropDownList1.SelectedItem.Value); } Reference: http://forums.asp.net/t/1537443.aspx http://forums.asp.net/t/1212831.aspx Mark This Response as Answer -- Chandu http://www.dotnetfunda.com/images/dnfmvp.gif Saanjhi, if this helps please login to Mark As Answer. \| Alert Moderator

Populate a Label and TextBox control based from the seselected value from the DropDownList :

private void GetData(string ID)
{
    DataTable dt = new DataTable();
    SqlConnection connection = new SqlConnection("YOUR CONNECTION STRING HERE");
    connection.Open();
    SqlCommand sqlCmd = new SqlCommand("SELECT * FROM YourTable WHERE ID= @ID", connection);
    SqlDataAdapter sqlDa = new SqlDataAdapter(sqlCmd);
    sqlCmd.Parameters.AddWithValue("@ID",ID);
    sqlDa.Fill(dt);
    if (dt.Rows.Count > 0)
    {
           TextBox1.Text = dt.Rows[0]["ColumnName1"].ToString(); //Where ColumnName is the Field from the DB that you want to display
           Label1.Text = dt.Rows[0]["ColumnName2"].ToString();
    }
    connection.Close();
}


protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
        GetData(DropDownList1.SelectedItem.Value);
}

Reference:
http://forums.asp.net/t/1537443.aspx
http://forums.asp.net/t/1212831.aspx

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Posted by: Saanjhi on: 10/3/2013 [Member] Starter | Points: 25

0	and that data in grid view ?? instead of labels or text box??? Saanjhi, if this helps please login to Mark As Answer. \| Alert Moderator

Posted by: Bandi on: 10/3/2013 [Member] [MVP] Platinum | Points: 25

0	Look into the following Sample: Here I took one drop downlist with values 10, 20, 30, 40 and 50 as department IDs and also one GridView for data binding based on DropDownList selected value <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="GridViewWithDropDownList.aspx.cs" Inherits="TextBoxValidation.GridViewWithDropDownList" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <asp:DropDownList runat="server" AutoPostBack="true" ID="DropDownList1" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"> <asp:ListItem Text="10" /> <asp:ListItem Text="20" /> <asp:ListItem Text="30" /> <asp:ListItem Text="40" /> <asp:ListItem Text="50" /> </asp:DropDownList> <asp:GridView runat="server" ID="gdvEmp"/> </div> </form> </body> </html> aspx.cs Code using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data; using System.Data.SqlClient; namespace TextBoxValidation { public partial class GridViewWithDropDownList : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { GetData(DropDownList1.SelectedValue); } } private void GetData(string ID){ DataTable dt = new DataTable(); SqlConnection connection = new SqlConnection("Data source=XXXX ; Initial Catalog=study ; Integrated Security=true"); connection.Open(); SqlCommand sqlCmd = new SqlCommand("SELECT * FROM Employees WHERE Department_ID= @ID", connection); SqlDataAdapter sqlDa = new SqlDataAdapter(sqlCmd); sqlCmd.Parameters.AddWithValue("@ID",ID); //sqlDa.Fill(dt); DataSet ds = new DataSet(); sqlDa.Fill(ds); gdvEmp.DataSource = ds; gdvEmp.DataBind(); connection.Close(); } protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) { GetData(DropDownList1.SelectedItem.Value); } } } Mark This Response as Answer -- Chandu http://www.dotnetfunda.com/images/dnfmvp.gif Saanjhi, if this helps please login to Mark As Answer. \| Alert Moderator

Look into the following Sample:

Here I took one drop downlist with values 10, 20, 30, 40 and 50 as department IDs and also one GridView for data binding based on DropDownList selected value

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="GridViewWithDropDownList.aspx.cs" Inherits="TextBoxValidation.GridViewWithDropDownList" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:DropDownList runat="server" AutoPostBack="true" ID="DropDownList1" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
            <asp:ListItem Text="10" />
            <asp:ListItem Text="20" />
            <asp:ListItem Text="30" />
            <asp:ListItem Text="40" />
            <asp:ListItem Text="50" />
        </asp:DropDownList>
        <asp:GridView runat="server" ID="gdvEmp"/> 
    </div>
    </form>
</body>
</html>

aspx.cs Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;

namespace TextBoxValidation
{
    public partial class GridViewWithDropDownList : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                GetData(DropDownList1.SelectedValue);
            }
        }
        private void GetData(string ID){    
            DataTable dt = new DataTable();    
            SqlConnection connection = new SqlConnection("Data source=XXXX ; Initial Catalog=study ; Integrated Security=true");    
            connection.Open();    
            SqlCommand sqlCmd = new SqlCommand("SELECT * FROM Employees  WHERE Department_ID= @ID", connection);    
            SqlDataAdapter sqlDa = new SqlDataAdapter(sqlCmd);    
            sqlCmd.Parameters.AddWithValue("@ID",ID);    
            //sqlDa.Fill(dt);
            DataSet ds = new DataSet();
            sqlDa.Fill(ds);
            gdvEmp.DataSource = ds;
            gdvEmp.DataBind();

            connection.Close();
            }
            
            protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
            {        
                GetData(DropDownList1.SelectedItem.Value);
            }
    }
}

Mark This Response as Answer
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Saanjhi, if this helps please login to Mark As Answer. | Alert Moderator

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