How to validate each textbox in GridView using CustomValidator RSS

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  deannaxcv

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  4 Posts

  How to validate each textbox in GridView using CustomValidator

  Apr 01, 2021 06:30 AM|deannaxcv|LINK

  I have GridView with TextBoxes.

  My codes are:
                      <asp:TemplateField HeaderText="Sale Type" Visible="true" ItemStyle-Width="80px">
                          <ItemTemplate>
                              <asp:TextBox runat="server" ID="tb_saleType" Text='<%#DataBinder.Eval(Container.DataItem, "sale_type")%>' CssClass="form-control input-sm"></asp:TextBox>
                          </ItemTemplate>
                      </asp:TemplateField>
                      

  <asp:TemplateField HeaderText="Internal Product Details">
       <ItemTemplate>
            <asp:TextBox ID="tb_prodCode" runat="server" CssClass="form-control input-sm" Text='<%#DataBinder.Eval(Container.DataItem,  "ConvertProd")%>'></asp:TextBox>
  <asp:CustomValidator ID="cv_tb_prodCode" runat="server" ControlToValidate="tb_prodCode" ForeColor="Tomato" Display="Dynamic" ErrorMessage="Product code does not exists" SetFocusOnError="true" OnServerValidate="cv_tb_prodCode_ServerValidate"></asp:CustomValidator>
       </ItemTemplate>
  </asp:TemplateField>

  c# :

  
      protected void cv_tb_prodCode_ServerValidate(object source, ServerValidateEventArgs args)
      {
          TextBox saleType = gridProducts.Rows[gridProducts.EditIndex].FindControl("tb_saleType") as TextBox;
          TextBox prodCode = gridProducts.Rows[gridProducts.EditIndex].FindControl("tb_prodCode") as TextBox;

          //to validate if product code planned to convert //check if exists in db
          string prodDescx = new DAL.ePlannings().getProdCodeDesc(saleType.Text.Trim(), prodCode.Text.Trim(), tb_mfg.Text);

          if (prodDescx == null)
          {
              args.IsValid = false;
          }
          else
          {
              args.IsValid = true;
          }
      }

  I need to validate those textboxes once user click submit. But come out error on method cv_tb_prodCode_ServerValidate

• • Reply
  yij sun

  Contributor

  3990 Points

  1562 Posts

  Re: How to validate each textbox in GridView using CustomValidator

  Apr 02, 2021 03:06 AM|yij sun|LINK

  Hi deannaxcv,

  According to your description,I have tested your codes and I reproduced your problems.

  When you click the button to validate the value,it couldn't find which rows of gridview you have clicked. So you need to get the index you have clicked.Just like this:

  <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
                  <Columns>
                      <asp:TemplateField HeaderText="Sale Type" Visible="true" ItemStyle-Width="80px">
                          <ItemTemplate>
                              <asp:TextBox runat="server" ID="tb_saleType" Text='<%#DataBinder.Eval(Container.DataItem, "Id")%>' CssClass="form-control input-sm"></asp:TextBox>
                          </ItemTemplate>
                      </asp:TemplateField>
                      <asp:TemplateField HeaderText="Internal Product Details">
                          <ItemTemplate>
                              <asp:TextBox ID="tb_prodCode" runat="server" CssClass="form-control input-sm" Text='<%#DataBinder.Eval(Container.DataItem,  "Total")%>'></asp:TextBox>
                              <asp:CustomValidator ID="cv_tb_prodCode" runat="server" ControlToValidate="tb_prodCode" ForeColor="Tomato" Display="Dynamic" ErrorMessage="Product code does not exists" SetFocusOnError="true" OnServerValidate="cv_tb_prodCode_ServerValidate"></asp:CustomValidator>
                          </ItemTemplate>
                      </asp:TemplateField>
                      <asp:TemplateField>
                          <ItemTemplate>
                              <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
                          </ItemTemplate>
                      </asp:TemplateField>
                  </Columns>
              </asp:GridView>

  Code-behind:

  protected void cv_tb_prodCode_ServerValidate(object source, ServerValidateEventArgs args)
          {
              CustomValidator cv = (CustomValidator)source;
              GridViewRow row = (GridViewRow)cv.NamingContainer;
              TextBox saleType = row.FindControl("tb_saleType") as TextBox;
              TextBox prodCode = row.FindControl("tb_prodCode") as TextBox;
              //to validate if product code planned to convert //check if exists in db
              string prodDescx = new DAL.ePlannings().getProdCodeDesc(saleType.Text.Trim(), prodCode.Text.Trim(), tb_mfg.Text);
              if (prodDescx == null)
              {
                 args.IsValid = false;
              }
              else
              {
                 args.IsValid = true;
              }
          }
  
          protected void Button1_Click(object sender, EventArgs e)
          {
  
          }

  Best regards,

  Yijing Sun

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