如何相对于来自DataGrid背后的代码或数据源的数据更改项目模板中的组合框

Question

I have a data grid, and data is coming from database, it has combo boxes in status and I want them to be according to their respective values, for example, there is a column of status, it has a combo box: Open and Close, I want it to be changed with respect to the value it has in database table-column, if it has Close written in database table column, combo box should be selected as Close, if it has Open then it should be selected as Open. Please see the image attached. Thanks for Help in advance.

Answer 1

Assuming that you're using a template column, you can do this:

<asp:TemplateColumn>
    <ItemTemplate>
        <asp:DropDownList ID="DropDownList1" runat="server" SelectedValue='<%# Eval("DropDownValueColumn") %>' />
    </ItemTemplate>
</asp:TemplateColumn>

If you want to set the SelectedValue in the ItemDataBound event, you can do it like this:

protected void DataGrid1_ItemDataBound(object sender, GridItemEventArgs e)
{
    DropDownList ddl = e.Item.FindControl("DropDownList1") as DropDownList;
    if (ddl != null)
    {
        ddl.SelectedValue = DataBinder.Eval(e.Item.DataItem, "DropDownColumnValue").ToString();
    }
}

Answer 2

First of all save your data source in viewstate. If datasource is datatable then do like this.

protected void gridview1_RowDataBound(object sender, GridViewRowEventArgs e)
{

        if (e.Row.RowType == DataControlRowType.DataRow)
        {

            DropDownList ddlList = (DropDownList)e.Row.FindControl("Name_of_DPList");
            int i=e.Row.RowIndex;
            DataTable dtTable = (DataTable)ViewState["dtPurchaseOrder"];
            string str = dtTable.Rows[i]["Name_Of_column"].ToString();//Name of the column in data source that stores the status.
            ddlList.items.FindByText(str).Selected=true;
        }
    }