CODEWITHSUNDEEP
c#asp.netgridviewdrop-down-menu
TFrost
TFrost

Reputation: 777

Selecting respective item in drop down list when edit button is clicked

I am working on ASP.NET C# web application. I have a DropDownList for selecting machines_names that is Databound. And a gridview which displays stored data. Gridview also contains templateField for Edit and Delete Buttons. When Edit Button is clicked the stored values of respective fields must be must be loaded on respective field in web form. The problem is when I click edit button, item in ddl (the default value "--select--") is replaced by current data.

I want the stored ddl item to be selected in the ddl when the edit button is clicked. For example in ddl there are items such as 

--select--
Roller
Heater
sensor

In grid view I have the following 

Repair-id machine
  1       roller
  2       sensor

So when I click edit button of ID 2 in grid view, the ddl must select the third item ie sensor without replacing the top item in ddl.

Here's my code

protected DataTable bindMachineName()
{
    DataTable dt = new DataTable();
        dc.Company_code = Convert.ToInt32(Session["Company_Code"].ToString());
        dt = dpbll.select_machine_name(dc);
        ddlMachine.DataSource = dt;
        ddlMachine.DataTextField = "machine_name";
        ddlMachine.DataValueField = "machine_id";
        ddlMachine.DataBind();
        ddlMachine.Items.Insert(0, new ListItem("----- Select -----", "-1"));           
    return dt;
}
protected void btnEdit_Click(object sender, EventArgs e)
{
    dc.Company_code = Convert.ToInt32(Session["company_code"].ToString());
    Button btn = (Button)sender;
    GridViewRow gv = (GridViewRow)btn.NamingContainer;
    string repair_id = gv.Cells[0].Text;
    ViewState["repair_id"] = repair_id;
    ddlMachine.SelectedItem.Text = gv.Cells[1].Text;
}

Upvotes: 1

Views: 2760

Answers (2)

TFrost
TFrost

Reputation: 777

Nevermind I solved the problem. ddlMachine.Items.FindByText(gv.Cells[1].Text did work perfectly.

protected void btnEdit_Click(object sender, EventArgs e)
    {
        dc.Company_code = Convert.ToInt32(Session["company_code"].ToString());
        Button btn = (Button)sender;
        GridViewRow gv = (GridViewRow)btn.NamingContainer;
        string repair_id = gv.Cells[0].Text;
        ViewState["repair_id"] = repair_id;
        ddlMachine.SelectedIndex=ddlMachine.Items.IndexOf(ddlMachine.Items.FindByText(gv.Cells[1].Text));            
    }

Upvotes: 1

Tim Schmelter
Tim Schmelter

Reputation: 460108

The problem is when I click edit button, item in ddl (the default value "--select--") is replaced by current data.

You might want to set the DropDownList's AppendDataBoundItems to true.

<asp:DropDownList runat="server" ID="ddlMachine" AppendDataBoundItems="true">
         <asp:ListItem Text="----- Select -----" Value="-1" />
</asp:DropDownList>

The AppendDataBoundItems property allows you to add items to the ListControl object before data binding occurs. After data binding, the items collection contains both the items from the data source and the previously added items.

Upvotes: 0

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