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Refresh Dropdownlist in webform


Refresh Dropdownlist in webform

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Refresh Dropdownlist in webform
Tag : chash , By : ponchopilate
Date : November 25 2020, 07:22 PM


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How do I dynamically load a dropdownlist in a Webform Gridview?


Tag : asp.net , By : todor
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further I have a templated Gridview where I only want to display one column (Questions --- these are database obtained), and the other the dropdownlist of possible answers (Options). The dropdownlist's values change depending on the type of the question. There are only 2 types: T/F or ranged (Lo, Med, High). So if the question is type 1, the dropdownlist should just display T/F. Likewise if it's type II. , How about something like
<asp:DropDownList ID="UserDropDown" runat="server" AppendDataBoundItems="true" 
 ondatabinding="DropDownList1_DataBinding" DataTextField="key" DataValueField="value"></asp:DropDownList>
 protected void DropDownList1_DataBinding(object sender, EventArgs e)
    {
        var ddl = sender as DropDownList;
        if(ddl!=null)
        {
          //populate list. 
          ddl.Items.Add(new ListItem("test"));
        }
    }

Webform dropdownlist Value and NAME


Tag : asp.net , By : user185283
Date : March 29 2020, 07:55 AM
Hope this helps Hi hoping this is a simple question and im just doing something silly... i have a aspx page and aspx.vb page for the code behind my webform the page has a asp dropdown list popualted from a SQL data source
String selectedText = DDL23.SelectedItem.Text;

Bind a returned object of DropDownList to an asp:DropDownList webform


Tag : chash , By : Daniel Reslie
Date : March 29 2020, 07:55 AM
hope this fix your issue I have adjusted your code for you to be able to bind your data to your dropdownlist
protected ICollection ddNames() {

        string selectSQL = "mysql stuff";

        string connString = "my string";
        SqlCommand cmd = new SqlCommand(selectSQL, conn);
        SqlDataReader reader;
    // Create a table to store data for the DropDownList control.
     DataTable dt = new DataTable();

     // Define the columns of the table.
     dt.Columns.Add(new DataColumn("NewItemTextField", typeof(String)));
     dt.Columns.Add(new DataColumn("NewItemValueField", typeof(String)));

     dt.Rows.Add(CreateRow("Unassigned", "999999", dt));
        try  {
            conn.Open(); 
            reader = cmd.ExecuteReader();
            while ( reader.Read() )  {
                    // Populate the table with sample values.
                    dt.Rows.Add(CreateRow(DataHelpers.GetUserFirstLastFromID(Convert.ToInt32(reader["someid"])), reader["someid"].ToString(), dt));
            }
            reader.Close();
        }   catch (Exception ex)   {
             throw ex;
        }   finally    {

                if (conn != null)  {
                    conn.Dispose();
                    conn.Close();
                }
         }

    return dt;

    }

  DataRow CreateRow(String Text, String Value, DataTable dt)
  {

     // Create a DataRow using the DataTable defined in the 
     // CreateDataSource method.
     DataRow dr = dt.NewRow();

     // This DataRow contains the NewItemTextField and NewItemValueField 
     // fields, as defined in the CreateDataSource method. Set the 
     // fields with the appropriate value. Remember that column 0 
     // is defined as NewItemTextField, and column 1 is defined as 
     // NewItemValueField.
     dr[0] = Text;
     dr[1] = Value;

     return dr;

  }
 // Specify the data source and field names for the Text 
        // and Value properties of the items (ListItem objects) 
        // in the DropDownList control.
        dd_name.DataSource = ddNames();
        dd_name.DataTextField = "NewItemTextField";
        dd_name.DataValueField = "NewItemValueField";

        // Bind the data to the control.
        dd_name.DataBind();

        // Set the default selected item, if desired.
        dd_name.SelectedIndex = 0;

Tag : chash , By : littlefuzz
Date : March 29 2020, 07:55 AM
This might help you I want to get what I write in the textbox but always get the "" string. I can't find the value when I type something else into the textboxT_T. , View state's purpose is simple:

Iterating Through All DropDownList In an ASP.NET WebForm C#


Tag : chash , By : 40a
Date : March 29 2020, 07:55 AM
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