How to get values from template fields in GridView?

问题

This is my markup of GridView.

<Columns>
    <asp:TemplateField HeaderText="Customer Name">
        <ItemTemplate>
            <asp:Label ID="lblname" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "Customer.Name")%>'></asp:Label>
        </ItemTemplate>
    </asp:TemplateField>
    <asp:TemplateField HeaderText="PickUpPoint">
        <ItemTemplate>
            <asp:Label ID="lblPickUpPoint" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "Pickuppoint")%>'></asp:Label>
        </ItemTemplate>
    </asp:TemplateField>
</Columns>

I have a button which stores the values in the worksheet cells of excel object.

for (int i = 0; i < GridView2.Rows.Count; i++)
{
    for (int j = 0; j < GridView2.Rows[i].Cells.Count; j++)
    {
        xlWorkSheet.Cells[i + 1, j + 1] = GridView2.Rows[i].Cells[j].Text;
   }
}

How do I get the values of GridView and store it in a worksheet, as the GridView2.Rows[i].Cells[j].Text returns empty string.

回答1:

Your are missing a type cast. Do it like this-

Label name = (Label)GridView2.Rows[i].Cells[j].FindControl("lblname");
xlWorkSheet.Cells[i + 1, j + 1] = name.Text;

Update- If you can name your labels as Label0 and Label1, then in the second for loop-

for (int j = 0; j < GridView2.Rows[i].Cells.Count; j++)
  {
     Label xyz = (Label)GridView2.Rows[i].Cells[j].FindControl("Label"+j);
     xlWorkSheet.Cells[i + 1, j + 1] = xyz.Text;
  }

For Header text- string hText = GridView2.HeaderRow.Cells[your column number].Text;

回答2:

For retrieving values do this:

for (int i = 0; i < GridView2.Rows.Count; i++)
{
  //extract the TextBox values
  Label lblname= (Label)GridView2.Rows[i].Cells[0].FindControl("lblname");
  Label lblPickUpPoint= (Label)GridView2.Rows[i].Cells[0].FindControl("lblPickUpPoint");
  //Do your excel binding here
}

回答3:

{cell}.Text will only work if there isn't a control within the TemplateField. You have added a label to your template which is why you first need to find the control, cast your object to the control and access the control's properties as needed.

If you want a more generic approach you could always do the following (remove the label control and simply add the evaluated field):

<Columns>
    <asp:TemplateField HeaderText="Customer Name">
        <ItemTemplate>
            <%# DataBinder.Eval(Container.DataItem, "Customer.Name")%>
        </ItemTemplate>
     </asp:TemplateField>
     <asp:TemplateField HeaderText="PickUpPoint">
         <ItemTemplate>
             <%# DataBinder.Eval(Container.DataItem, "Pickuppoint")%>
         </ItemTemplate>
     </asp:TemplateField>
</Columns>

When you use the code you initially used, the {cell}.Text should no longer return empty.

回答4:

Try using this code, I had a similar problem. I think this code is more dynamic and you do not have to find the name of the label every time. But to keep the correspondence between the controls And the index Controls [ ]:

for (int row = 1; row <= totalRows; row++)
{
    for (int col = 0; col < totalCols; col++)
    {
        if (GridView1.Columns[col].Visible)
        {
            if (String.IsNullOrEmpty(GridView1.Rows[row - 1].Cells[col].Text))
            {
                if (GridView1.Rows[row - 1].Cells[col].Controls[1].GetType().ToString().Contains("Label"))
                {
                    Label LB = (Label)GridView1.Rows[row - 1].Cells[col].Controls[1];
                    workSheet.Cells[row + 1, col + 1].Value = LB.Text;
                }
                else if (GridView1.Rows[row - 1].Cells[col].Controls[1].GetType().ToString().Contains("LinkButton"))
                {
                    LinkButton LB = (LinkButton)GridView1.Rows[row - 1].Cells[col].Controls[1];
                    workSheet.Cells[row + 1, col + 1].Value = LB.Text;
                }
            }
            else
            {
                workSheet.Cells[row + 1, col + 1].Value = GridView1.Rows[row - 1].Cells[col].Text;
            }

回答5:

 protected void Button1_Click(object sender, EventArgs e)
    {
        int i = 0;
        for (i = 0; i <= GvSchedule.Rows.Count - 1; i++)
        {
            if (((CheckBox)GvSchedule.Rows[i].FindControl("ChkIsService")).Checked)
            {
                string catName = ((Label)GvSchedule.Rows[i].FindControl("lblCatName")).Text;
                var subCatName = ((Label)GvSchedule.Rows[i].FindControl("lblSubCatName")).Text;
            }
        }
     }

来源：https://stackoverflow.com/questions/13795468/how-to-get-values-from-template-fields-in-gridview

标签

ASP.NET

excel

gridview

templatefield