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I have GridView:

  <asp:GridView ID="MyGridView" runat="server" ShowFooter="true"
                                     AutoGenerateColumns="False" Visible="True">
<Columns>
<asp:BoundField DataField="id" ItemStyle-HorizontalAlign="center"/>
<asp:BoundField DataField="fullName"  />
<asp:TemplateField HeaderText="situation>">
<ItemTemplate>
  <asp:DropDownList ID="dl_situation" runat="server" AppendDataBoundItems="true">
   </asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>

<asp:TemplateField HeaderText="procesVerbal">
 <ItemTemplate>
         <asp:TextBox ID="tbNr" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>  

<asp:TemplateField HeaderText="Data">
<ItemTemplate>
               <asp:TextBox ID="tbDate" runat="server"></asp:TextBox>
 </ItemTemplate>
</asp:TemplateField>     
</Columns>
</asp:GridView>

Now I want to fill this Grid with data from database, I have one method that returns datatable with all my data

when I fill mygrid: 

 MyGridView.DataSource = dataTable;
 MyGridView.Databind();

in this case all TextBoxes and DropDownList are null.

In the code below I'm trying to create a function that receives DataTable from database and populates gridview with data. How do I make a foreach statement for dataTable.Rows that will assign text values to TextBox elements and selectedIndex value to DropDownList?

protected bool FillGridWithData(DataTable dataTable)
       {bool result;
       try
       {
           foreach (GridViewRow row in MyGridView1.Rows)
           {
               if (row.RowType != DataControlRowType.DataRow) break;
               var ddl = (DropDownList)row.FindControl("dl_situation");
               if (ddl != null)
               {
                 ddl.DataSource = PublicStatic.Situation;
                 ddl.DataTextField = PublicStatic.Name;
                 ddl.DataValueField = PublicStatic.Code;
                 ddl.DataBind();
                 ddl.Items.Insert(0, new ListItem(String.Empty, String.Empty));
                 ddl.SelectedIndex = //data from datatable;
               }
               var tb1 = (TextBox)row.FindControl("tbNr");
               if (tb1 != null)
                   tb1.Text =//data from datatable;

               var tb2 = (TextBox)row.FindControl("tbDate");
               if (tb2 != null)
                   tb2.Text = //data from datatable;
           }
           result = true;
       }
       catch (Exception exception)
       {
           result = false;
       }
       return result;
   }
4

1 回答 1

1

The DataField attribute in the bound field must equal to the column name in the datatable. For binding textboxes in the template field you can use the Eval or Bind Method.

Example:

<asp:TemplateField HeaderText="procesVerbal">
 <ItemTemplate>
     <asp:TextBox ID="tbNr" Text='<%# Eval("ColumnName") %>' runat="server"></asp:TextBox>
 </ItemTemplate>
</asp:TemplateField>

and for binding the dropdown in the gridview, you can use a separate sql datasource. and specify dropdownlist DataSourceID,DataTextField and DataValueField property.

Dropdownlist Example:

<asp:TemplateField>
     <ItemTemplate>
        <asp:DropDownList ID="ddl" runat="server"  DataSourceID="SqlDataSource1" DataTextField="ProductName" DataValueField="ProductID" ></asp:DropDownList>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>" SelectCommand="SELECT [ProductName], [ProductID] FROM [Alphabetical list of products]"></asp:SqlDataSource>
     </ItemTemplate>
</asp:TemplateField>

and if you want to bind the datasource from code behind then you can use RowDataBound event of gridview

protected void GridView1_RowDataBound(Object sender, GridViewRowEventArgs e)
{

    if(e.Row.RowType == DataControlRowType.DataRow)
    {           
        TextBox t = (TextBox)e.Row.FindControl("ControlID"); 
        t.Text = "Some Text";
    }

}

于 2012-08-16T10:28:25.180 回答