updating database with checkboxes

Question

i have a datagrid and every row has a checkbox on it. also every field in every row can be updated

the user can update multiple rows and check any checkboxes.

at

Answer 1

Go through the datagrid and store all of the data that you want to update in arrays or the like. Sql server has a bit datatype and you can set it to 0 if the checkbox is off or 1 if it is checked. Once you collect all the data pass it to your data layer for a sql update

You can use the DataGrid object to iterate through its cells/controls. For example, using a nested loop you can do:

myDG.Items[index1].Cells[index2].Controls[0]

Edit: It depends on the input controls you have in the columns because you have to cast them. Say you have a datagrid with 10 columns and TextBoxes in all columns except the last, which is CheckBox, you would do:

CheckBox cb = null;
TextBox tb = null;
List<string> myList = new List<string>();
for(int row = 0; row < myDG.Items.Count; row++)
{
  for(int col = 0; col < myDG.Columns.Count; col++)
  {
    if(col < 9){
      tb = myDG.Items[row].Cells[col].Controls[0] as TextBox;
      myList.Add(tb.Text);
    }
    else{
      cb = myDG.Items[row].Cells[col].Controls[0] as CheckBox;
      myList.Add(((cb.Checked) ? "1" : "0"));
    }
  }
}

You could use a 2D array/list to store if you wanted too. HTH

Answer 2

If you are using a GridView, building on the example from a previous example you got, you can do this. ** this is semi-pseudo code, beware**

<asp:gridview id="CustomersGridView" 
    datasourceid="CustomersSqlDataSource" 
    autogeneratecolumns="false"
    autogenerateeditbutton="true"
    allowpaging="true" 
    datakeynames="CustomerID"  
    runat="server">

    <columns>
      <asp:templatefield>
         <itemtemplate> <%-- This is itemtemplate so they are visible by default --%>
            <asp:CheckBox ID="cbVerify" runat="server"></asp:CheckBox>
            <asp:HiddenField ID="hidID" runat="server" Value='<%# Bind("CustomerID") %>'></asp:HiddenField>
         </itemtemplate>
      </asp:templatefield>
      <asp:boundfield datafield="CustomerID" readonly="true" headertext="Customer ID"/>
      <asp:boundfield datafield="CompanyName" readonly="true" headertext="Customer Name"/>
      <asp:boundfield datafield="Address" headertext="Address"/>
      <asp:boundfield datafield="City" headertext="City"/>
      <asp:boundfield datafield="PostalCode" headertext="ZIP Code"/>
    </columns>
</asp:gridview>

<asp:Button ID="btSubmit" runat="server" OnClick="btSubmit_Click"></asp:Button>

Code behind to process this

public void btSubmit_Click(object sender, EventArgs e)
{
  foreach (GridViewRow row in CustomersGridView.Rows) 
  {
    CheckBox cbVerify = (CheckBox)row.FindControl("cbVerify");
    HiddenField hidID = (HiddenField)row.FindControl("hidID");

    // Do your validation of the data here
    ..

    if (cbVerify != null)
    {
      // Add fields and update
      sqlRecord.UpdateParameters["ID"].DefaultValue = hidID.Value;
      sqlRecord.UpdateParameters["Valid"].DefaultValue = cbVerify.Checked.ToString();
      sqlRecord.Update();
    }
}

This should get you in a specific direction to look.