无法在 GridView 中检索行删除值答案

【问题标题】：Cannot retrieve value on rowdeleting in GridView无法在 GridView 中检索行删除值
【发布时间】：2017-06-14 18:26:12
【问题描述】：

我在检索值以删除记录时遇到问题。我在带有模板字段的网格视图中使用 OnRowDeleting，我无法检索要删除的记录选定值，这是我的网格：

<asp:GridView ID="gvw_Cli_Emp_EmpData" runat="server" AutoGenerateColumns="false"
        CssClass="mGrid" PagerStyle-CssClass="pgr" Width="50%" AutoGenerateDeleteButton="True" 
        AlternatingRowStyle-CssClass="alt" Font-Size="Small" OnRowDeleting="Borrando">
        <Columns>
            <asp:TemplateField>
                <ItemTemplate>
                    <a href="#" onclick="window.open('Clientes_Empleados_Detalle.aspx?cliCod= <%#Eval("ClienteCodigo1").ToString() 
                        + "&EmpNom=" + Eval("Empleado1").ToString()
                        + "&EmpCod=" + Eval("IdCliEmp").ToString()
                        + "&idDepart=" + Eval("IdDepartamento").ToString()
                        + "&Depart=" + Eval("Departamento1").ToString()
                        + "&EmpNiv=" + Eval("NivelAcceso1").ToString()    
                        %> ','PrintMe','height=500px,width=800px,scrollbars=1');">Editar</a>
                </ItemTemplate>
            </asp:TemplateField>
             <asp:TemplateField HeaderText="CLIENTE">
                <ItemTemplate>
                    <asp:Label ID="lbl_CliEmp_CliCod" runat="server" Text='<%# Eval("ClienteCodigo1") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="CODIGO">
                <ItemTemplate>
                    <asp:Label ID="lbl_CliEmp_EmpId" runat="server" Text='<%# Eval("IdCliEmp") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="EMPLEADO">
                <ItemTemplate>
                    <asp:Label ID="lbl_CliEmp_EmpNom" runat="server" Text='<%# Eval("Empleado1") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="ID DEP">
                <ItemTemplate>
                    <asp:Label ID="lbl_CliEmp_DepId" runat="server" Text='<%# Eval("IdDepartamento") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="DEPARTAMENTO">
                <ItemTemplate>
                    <asp:Label ID="lbl_CliEmp_EmpDep" runat="server" Text='<%# Eval("Departamento1") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="NIVEL">
                <ItemTemplate>
                    <asp:Label ID="lbl_CliEmp_EmpNiv" runat="server" Text='<%# Eval("NivelAcceso1") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>

        </Columns>
    </asp:GridView>

对于删除：

protected void Borrando(object sender, GridViewDeleteEventArgs e)
{
    string cell = gvw_Cli_Emp_EmpData.Rows[e.RowIndex].Cells[0].Text; //this retuns me ""
    int EmpCliCod = Convert.ToInt32(cell);

    DialogResult dialogResult = MessageBox.Show(new Form { TopMost = true }, "Delete?", "Confirma", MessageBoxButtons.YesNo);
    if (dialogResult == DialogResult.Yes)
    {
        cliEmpBL.clientesEmpleados_SupEmpleado(EmpCliCod); //here execute deletion record from my datalayer 
        Page.ClientScript.RegisterStartupScript(this.GetType(), "AlertScript", "alert('Deleted!');", true);
    }
    else if (dialogResult == DialogResult.No)
    { }
}

所以，如您所见，返回我“”。我试过解决这个问题，使用：

        System.Windows.Forms.Label EmpId = e.Item.FindControl("lbl_CliEmp_CliCod") as System.Windows.Forms.Label;
    string val = EmpId.Text;

但同样的结果，你知道吗？拜托，我希望有人能帮助我。

最好的问候

【问题讨论】：

MessageBox 不是 asp.net 功能。它适用于winforms。不要在网络环境中使用System.Windows.Form。

标签： c# asp.net sql-server gridview

【解决方案1】：

尝试实现以下示例，您将获得所选行的 id

<asp:LinkButton ID="lnkdelete" runat="server" CommandName="Delete" CommandArgument='<%#Eval("ClienteCodigo1")%>'>Delete</asp:LinkButton>

protected void Gridview1_RowCommand(object sender, GridViewCommandEventArgs e)
{
  if (e.CommandName == "Delete")
    {
      int ID = Convert.ToInt32(e.CommandArgument);
      //now perform the delete operation using ID value
    }
}

【讨论】：

【解决方案2】：

感谢 Patrik，您的解决方案帮助了我。

<asp:GridView ID="gvw_CliEmp_EmpData" runat="server" AutoGenerateColumns="false"
        CssClass="mGrid" PagerStyle-CssClass="pgr" Width="50%"  
        AlternatingRowStyle-CssClass="alt" Font-Size="Small"
        OnRowCommand="gvw_CliEmp_EmpData_RowCommand" OnRowDeleting="gvw_CliEmp_EmpData_RowDeleting">
        <Columns>
            <asp:TemplateField>
                <ItemTemplate>
                    <a href="#" onclick="window.open('Clientes_Empleados_Detalle.aspx?cliCod= <%#Eval("ClienteCodigo1").ToString() 
                        + "&EmpNom=" + Eval("Empleado1").ToString()
                        + "&EmpCod=" + Eval("IdCliEmp").ToString()
                        + "&idDepart=" + Eval("IdDepartamento").ToString()
                        + "&Depart=" + Eval("Departamento1").ToString()
                        + "&EmpNiv=" + Eval("NivelAcceso1").ToString()    
                        %> ','PrintMe','height=500px,width=800px,scrollbars=1');">Editar</a>
                </ItemTemplate>
            </asp:TemplateField>
             <asp:TemplateField HeaderText="CLIENTE">
                <ItemTemplate>
                    <asp:Label ID="lbl_CliEmp_CliCod" runat="server" Text='<%# Eval("ClienteCodigo1") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="CODIGO">
                <ItemTemplate>
                    <asp:Label ID="lbl_CliEmp_EmpId" runat="server" Text='<%# Eval("IdCliEmp") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="EMPLEADO">
                <ItemTemplate>
                    <asp:Label ID="lbl_CliEmp_EmpNom" runat="server" Text='<%# Eval("Empleado1") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="ID DEP">
                <ItemTemplate>
                    <asp:Label ID="lbl_CliEmp_DepId" runat="server" Text='<%# Eval("IdDepartamento") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="DEPARTAMENTO">
                <ItemTemplate>
                    <asp:Label ID="lbl_CliEmp_EmpDep" runat="server" Text='<%# Eval("Departamento1") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="NIVEL">
                <ItemTemplate>
                    <asp:Label ID="lbl_CliEmp_EmpNiv" runat="server" Text='<%# Eval("NivelAcceso1") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField>
                <ItemTemplate>
                    <asp:LinkButton ID="lnkdelete" runat="server" CommandName="Delete" 
                        CommandArgument='<%#Eval("IdCliEmp")%>'>Eliminar
                    </asp:LinkButton>
                </ItemTemplate>
            </asp:TemplateField>


        </Columns>
    </asp:GridView>

和后面的代码：

#region ==== BORRAR REGISTROS DEL INGRESO ====

protected void gvw_CliEmp_EmpData_RowCommand(object sender, GridViewCommandEventArgs e)
{
    if (e.CommandName == "Delete")
    {
        int EmpCliCod = Convert.ToInt32(e.CommandArgument);

        DialogResult dialogResult = MessageBox.Show(new Form { TopMost = true }, "Eliminar?", "Confirmar", MessageBoxButtons.YesNo);
        if (dialogResult == DialogResult.Yes)
        {
            cliEmpBL.clientesEmpleados_SupEmpleado(EmpCliCod); //eliminar desde DL
            Page.ClientScript.RegisterStartupScript(this.GetType(), "AlertScript", "alert('Eliminado!');", true);
        }
        else if (dialogResult == DialogResult.No)
        { }

        gvw_CliEmp_EmpData.DataSource = null;
        gvw_CliEmp_EmpData.DataBind();
        gvw_CliEmp_EmpData.DataSource = cliEmpBL.clientes_Empleados_cons_EmpxCliente(lbl_CliEmp_CliCod.Text);
        gvw_CliEmp_EmpData.DataBind();
    }


}

protected void gvw_CliEmp_EmpData_RowDeleting(object sender, GridViewDeleteEventArgs e)
{//this is because grid fired event RowDeleting which wasn't handled
}
#endregion

【讨论】：