this is my code for populating a dropdown list with customers name.
protected void Page_Load(object sender, EventArgs e)
{
//Creating a connection to my database using the connection string
string cs = System.Configuration.ConfigurationManager.ConnectionStrings["RegistrationConnectionString"].ConnectionString;
SqlConnection con = new SqlConnection(cs);
{
SqlCommand cmd = new SqlCommand("Select CustomerName from Customer", con);
using (SqlDataAdapter da = new SqlDataAdapter(cmd))
{
DataTable dt = new DataTable();
da.Fill(dt);
DropDownList1.DataTextField = "CustomerName";
DropDownList1.DataSource = dt;
DropDownList1.DataBind();
}
}
}
protected void DropDownList1_SelectedIndexChanged1(object sender, EventArgs e)
{
}
}
I want to be able too; when this name is chosen from the dropdownlist box , the associated customer ID will appear in a textbox.
thanks!
It should be as simple as this, by the looks of it:
protected void DropDownList1_SelectedIndexChanged1(object sender, EventArgs e)
{
TextBox1.Text = DropDownList1.SelectedValue
}
Assuming you have a textbox whose ID is TextBox1.
Alternatively if you want to display the text from the dropdown list (as opposed to the ID value), then simply:
protected void DropDownList1_SelectedIndexChanged1(object sender, EventArgs e)
{
TextBox1.Text = DropDownList1.SelectedItem.Text
}
Related
This is my code to display table value to a DropDownList.
using (SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["Conn"].ConnectionString))
{
con.Open();
string str="SELECT ItemOne,ItemTwo,ItemThree FROM tableItem";
using (SqlCommand cmd = new SqlCommand(str, con))
{
SqlDataAdapter dA=new SqlDataAdapter(cmd);
dA.Fill(dT);
DropDownList1.DataSource = dT;
DropDownList1.DataValueField = "ItemTwo";
DropDownList1.DataTextField = "ItemOne";
DropDownList1.DataBind();
}
This is to display the selected value of DropDownList to a TextBox.
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
TextBox1.Text = DropDownList1.SelectedValue.ToString();
TextBox2.Text = //Get the value of ItemThree here
}
My problem is: How will I display the column value of ItemThree in another TextBox.
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
TextBox1.Text = DropDownList1.SelectedValue.ToString();
TextBox2.Text = DropDownList1.Items[2].ToString(); // 2 is your index
}
Another way of doing this
var connectionString = ConfigurationManager.ConnectionStrings["Conn"].ConnectionString;
var sql = "SELECT ItemOne, ItemTwo, ItemThree FROM tableItem";
using (var table = new DataTable) {
using (var adapter = new SqlDataAdapter(sql, connectionString)
adapter.Fill(table);
foreach (DataRow dr in table.Rows)
DropDownList1.Items.Add(new ListItem(dr["ItemTwo"], dr["ItemTwo"]) {
Tag = dr["ItemThree"]
});
}
Then from the event handler
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
TextBox1.Text = DropDownList1.SelectedValue.ToString();
TextBox2.Text = DropdownList1.SelectedItem.Tag.ToString();
}
I'm new in this and I'm a little lost.
Trying to show the values of my database in textbox by selecting in the combobox. But I can't.
Please help me. This is my code:
private void CargarDatos()
{
string consulta = "SELECT * FROM [dbo].[alumno]";
DataTable dt = new DataTable();
SqlConnection con = new SqlConnection(Properties.Settings.Default.conexion);
SqlCommand cmd = new SqlCommand(consulta, con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
try
{
con.Open();
da.Fill(dt);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
con.Close();
this.dataGridView1.DataSource = dt;
cbalumno.DataSource = dt;
cbalumno.DisplayMember="Nombre";
cbalumno.ValueMember="Id";
}
private void Form1_Load(object sender, EventArgs e)
{
CargarDatos();
}
private void cbalumno_SelectedIndexChanged(object sender, EventArgs e)
{
}
}
}
The parameters that i want to show are "Name" "Surname" and "DNI" of the table alumno.
Any ideas to how can I do that??
You can use DataRowView to get the record being bound with current SelectedItem. The Row property of DataRowView object will give you data row. Using this row you can get the columns being bound to it.
private void cbalumno_SelectedIndexChanged(object sender, EventArgs e)
{
DataRowView vrow = (DataRowView)cbalumno.SelectedItem;
string sValue = vrow.Row["Name"].ToString();
}
You already have placed the event cbalumno_SelectedIndexChanged in your code and now you have to use it.
Inside that event, just use the Text peroperty of that textbox and assign the value of the selected item in your combo box like this :
private void cbalumno_SelectedIndexChanged(object sender, EventArgs e)
{
yourTextBoxID.Text = comboBoxID.Text;
}
Hope this helps.
I want to populate TWO dropdownlist, based on selection of first dropdownlist the second dropdownlist will get populated.
Example :
Like i have two dropdownlist namely 1.ddlCountry and 2.ddlState
Now when country is selected then depending on the selected Country the States related with that Country will get populated in the State dropdownlist. I want to achieve this withour reloading the whole page in Asp.Net with coding language as C#.
How can i achieve the same?
Dropdownlist is fetching data from database by executing query.
You can use AJAX toolkit CascadingDropDown as told by Naresh.
OR
use ajax update panel and keep all Dropdowns in it. So the whole page will not load on changing dropdown value.
You didnt give the code to further solution.
protected void ddlCountry_SelectedIndexChanged(object sender, EventArgs e)
{
FillStateByCountry();
}
protected void ddlState_SelectedIndexChanged(object sender, EventArgs e)
{
FillLocationByCountryandState();
}
private void FillStateByCountry()
{
DataSet dstFillState;
int CountryId = Convert.ToInt32(ddlCountry.SelectedValue.ToString());
dstFillState = Tbl_State.FillDDLState(CountryId);
ddlState.DataSource = dstFillState;
ddlState.DataTextField = "State";
ddlState.DataValueField = "Id";
ddlState.DataBind();
}
similarly FillLocationByCountryandState();
Add two dropdownlists to your form and name it as cmbStates, cmbCities
when you select state name from cmbStates(dropwdownlist), cmbCities(dropdownlist) generates cities based on state name(cmbStates)
by fetching data from database
private void Form1_Load(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection("server=pbs-server;database=p2p;user id=shekar;password=sekhar#1346");
SqlCommand cmd = new SqlCommand("select states from Country", con);
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(cmd);
con.Open();
da.Fill(ds, "Country");
cmbStates.DataSource = ds.Tables[0];
cmbStates.SelectedValue = 0;
con.Close();
}
private void cmbStates_SelectedIndexChanged(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection("server=xxxx;database=xxxx;user id=xxxxr;password=xxxxxx");
SqlCommand cmd = new SqlCommand("select cities from States where cityname = 'cmbStates.SelectedItem.ToString()'", con);
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(cmd);
con.Open();
da.Fill(ds, "States");
cmbCities.DataSource = ds.Tables[0];
cmbCities.SelectedValue = 0;
con.Close();
}
OR
manually adding items
namespace DropDownlist
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
cmbStates.Items.Add("Andhra Pradesh");
cmbStates.Items.Add("Tamilnadu");
cmbStates.Items.Add("Karnataka");
cmbStates.SelectedValue = 0;
}
private void cmbStates_SelectedIndexChanged(object sender, EventArgs e)
{
if (cmbStates.SelectedItem.ToString() == "Andhra Pradesh")
{
cmbCities.Items.Clear();
cmbCities.Items.Add("Hyderabad");
cmbCities.Items.Add("Guntur");
cmbCities.Items.Add("Vijayawada");
cmbCities.SelectedValue = 0;
}
else if (cmbStates.SelectedItem.ToString() == "Tamilnadu")
{
cmbCities.Items.Clear();
cmbCities.Items.Add("Chennai");
cmbCities.Items.Add("Coimbatore");
cmbCities.Items.Add("ooty");
cmbCities.SelectedValue = 0;
}
else if (cmbStates.SelectedItem.ToString() == "Karnataka")
{
cmbCities.Items.Clear();
cmbCities.Items.Add("Bangalore");
cmbCities.Items.Add("Mangalore");
cmbCities.SelectedValue = 0;
}
else
{
MessageBox.Show("Please Select any value");
}
}
}
}
Every time my forms loads/open it will prompt "System.Data.DataRowView", How can I possibly remove this?
Here is my code:
{
InitializeComponent();
GetProcessorCardTypes();
}
private void GetProcessorCardTypes()
{
cn.Open();
MySqlCommand cmd = new MySqlCommand("call GetProcessorMethod(1)", cn);
MySqlDataAdapter adapter = new MySqlDataAdapter(cmd);
DataTable dt = new DataTable();
adapter.Fill(dt);
cmbProcessorMethods.DataSource = dt;
cmbProcessorMethods.ValueMember = "method_id";
cmbProcessorMethods.DisplayMember = "method_name";
}
private void cmbProcessorMethods_SelectedIndexChanged(object sender, EventArgs e)
{
MessageBox.Show(cmbProcessorMethods.SelectedValue.ToString());
}
If you want to completely remove message box, then remove cmbProcessorMethods_SelectedIndexChanged event handler. Or you can change it to display method_name of selected row:
private void cmbProcessorMethods_SelectedIndexChanged(object sender, EventArgs e)
{
DataRowView row = (DataRowView)cmbProcessorMethods.SelectedItem;
MessageBox.Show(row["method_name"].ToString());
}
As Derek pointed, just set DisplayMember and ValueMember properties before assigning data source and your original code will work:
cmbProcessorMethods.ValueMember = "method_id";
cmbProcessorMethods.DisplayMember = "method_name";
cmbProcessorMethods.DataSource = dt;
I have a RadioButtonList and a ListBox. I have bound RadioButtonList to database.
Therefore upon selecting an item in the RadioButtonList, I want to retrieve some data into the ListBox. The code I have tried is :
protected void Page_Load(object sender, EventArgs e)
{
RadioFill();
}
public void RadioFill()
{
SqlDataAdapter mydata = new SqlDataAdapter("SELECT DISTINCT Param_Name FROM Parameter_Value_Master", con);
DataSet dset = new DataSet();
mydata.Fill(dset, "Table");
RadioButtonList1.Items.Clear();
RadioButtonList1.DataSource = dset.Tables[0];
RadioButtonList1.DataTextField = dset.Tables[0].Columns["Param_Name"].ColumnName;
RadioButtonList1.DataBind();
}
protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
{
SqlDataAdapter mydata = new SqlDataAdapter("SELECT Value_Option FROM Parameter_Value_Master", con);
DataSet dset = new DataSet();
mydata.Fill(dset, "Table");
ListBox1.Items.Clear();
ListBox1.DataSource = dset.Tables[0];
ListBox1.DataTextField = dset.Tables[0].Columns["Value_Option"].ColumnName;
ListBox1.DataBind();
}
The issue I am facing here is upon selecting an item, the whole panel in which I have placed both my RadioButtonList and ListBox goes invisible.
Kindly help...!! Thankyou...!!
First, change Page_Load method as:
protected void Page_Load(object sender, EventArgs e)¨
{
if (!Page.IsPostBack)
{
RadioFill();
}
}
If it not help than post code from your *.aspx file.
Remark: The method RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e),
there is not selecting based on radio button list selected value.