C# 启用和禁用 gridview 上的链接按钮

Enable and disable link button on gridview

提问by ARATHY

I wants to enable or disable linkbutton on some rows of gridview based on condition.. Can i enable linkbutton on one row and disable it on another row of same grid view ??my code is here

我想根据条件在网格视图的某些行上启用或禁用链接按钮。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;
                }

            }




        }

采纳答案by Sanjeev Rai

Yes you can easily do it in RowdataBound Event, but you have used lnk2.Visibleproperty in your code.

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

you may be using Visibleproperty for another requirement but just want to confirm you that it is used to show/hide the Linkbutton only. To enable/disble a Linkbutton, use Enabledproperty of Linkbutton. as:

您可能正在将Visible属性用于其他要求，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.

If You want to do it using rowindex, then you can e.Row.RowIndexto find the current row index inside 'RowDatabound` event of gridview. as:

如果你想使用rowindex来做，那么你可以e.Row.RowIndex在gridview的'RowDatabound`事件中找到当前的行索引。作为：

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

If you want to enable/ disable Linkbutton based on value of some other column in the same row, then you can do the same inside Rowdataboundevent. as:

如果您想根据同一行中其他列的值启用/禁用链接按钮，那么您可以执行相同的内部Rowdatabound事件。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;
}

回答by Ravi Sharma

    --------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;
            }

        }
    }