c# - 在gridview上启用和禁用链接按钮

Question

我想根据条件启用或禁用某些网格视图行上的链接按钮。我可以在一行上启用链接按钮并在同一网格视图的另一行上禁用它吗？我的代码在这里

  protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{LinkButton lnk2 = (LinkButton)e.Row.FindControl("LinkButton2");
    if (e.Row.RowType == DataControlRowType.DataRow)
    {

        SqlCommand cmd12 = new SqlCommand("Select testsession_status from student_vs_testsession_details where  testsession_id='" + v_testid.Text + "' ", con12);
        SqlDataReader dr12 = cmd12.ExecuteReader();
        while (dr12.Read())
        {
            string test_status = dr12[0].ToString();
            LinkButton lnk2 = (LinkButton)e.Row.FindControl("LinkButton2");
            foreach (GridViewRow row in GridView1.Rows)
            {
                if (v_testtype == "Theory Test" && test_status == "Completed")
                {
                    lnk2.Visible = true;
                }
                else
                {
                    lnk2.Visible = false;
                }

            }




        }

Answer 1

是的，您可以在 RowdataBound 事件中轻松完成，但您lnk2.Visible在代码中使用了属性。

您可能将Visible属性用于另一个要求，但只是想确认它仅用于显示/隐藏链接按钮。要启用/禁用链接按钮，请使用Enabled链接按钮的属性。作为：

lnk2.Enabled = true;// to enable linkbutton.
lnk2.Enabled = false;// to disable linkbutton.

如果您想使用 rowindex 执行此操作，则可以e.Row.RowIndex在 gridview 的“RowDatabound”事件中找到当前行索引。作为：

if(e.Row.RowIndex==2)
{
  LinkButton lnk2 = (LinkButton)e.Row.FindControl("LinkButton2");
  lnk2.Enabled=false;
}

如果您想根据同一行中其他列的值启用/禁用链接按钮，那么您可以在内部Rowdatabound事件中执行相同的操作。作为：

string Namecolumnvalue = Convert.ToString(DataBinder.Eval(e.Row.DataItem, "Name"));
LinkButton lnk2 = (LinkButton)e.Row.FindControl("LinkButton2");
if(Namecolumnvalue =="Disable")
{      
  lnk2.Enabled=false;
}
else{
  lnk2.Enabled=true;
}

Answer 2

    --------aspx page code---------

     <asp:GridView ID="gvLibrary" runat="server" AutoGenerateColumns="False" Width="100%" DataKeyNames="LibMstRefNo"
                        EmptyDataText="No Client Found" CssClass="table table-striped table-bordered" OnRowDataBound="gvLibrary_RowDataBound">
                        <Columns>
     <asp:TemplateField HeaderText="Issue">
                            <ItemTemplate>
                               <asp:LinkButton ID="lnkIssue" runat="server" Text="Issue" OnClick="lnkIssue_Click"></asp:LinkButton>
                            </ItemTemplate>
                            <HeaderStyle HorizontalAlign="Left" />
                                <ItemStyle HorizontalAlign="Left" />
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="Receive">
                            <ItemTemplate>
                               <asp:LinkButton ID="lnkReceive" runat="server" Text="Receive" OnClick="lnkReceive_Click" OnClientClick="return confirm('Are you Sure?')"></asp:LinkButton>
                            </ItemTemplate>
                            <HeaderStyle HorizontalAlign="Left" />
                                <ItemStyle HorizontalAlign="Left" />
                        </asp:TemplateField>
                    </Columns>

</asp:GridView>


    ------------aspx.cs page code------------------

 protected void gvLibrary_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            string nbps = e.Row.Cells[8].Text;
            if(nbps== "&nbsp;")
            {
                nbps = "";
            }
            else
            {
                nbps = e.Row.Cells[8].Text;
            }
            if (nbps == "")
            {
                LinkButton btn = (LinkButton)e.Row.FindControl("lnkissue");
                LinkButton btn1 = (LinkButton)e.Row.FindControl("lnkReceive");
                btn.Enabled = true;
                btn1.Enabled = false;
                btn1.ForeColor = System.Drawing.Color.Red;

            }
            else
            {
                LinkButton btn = (LinkButton)e.Row.FindControl("lnkissue");
                LinkButton btn1 = (LinkButton)e.Row.FindControl("lnkReceive");
                btn.Enabled = false;
                btn.ForeColor = System.Drawing.Color.Red;
                btn1.Enabled = true;
            }

        }
    }