ASP.NET MVC调用控制器方法DevExpress

Question

我试图在控制器上调用一个方法，但它给了我一个空错误。我试图在代码上执行 getKeyValue，但它不起作用。我不知道我做错了什么。感谢您的帮助。

控制器代码

public  ActionResult EditRecord(int id)
{
    int x = id;

    return PartialView("~/Views/FileMaintenance/Principal/EditPrincipal.cshtml", PrincipalInfo);
}

DevExpress GridView 代码

settings.Columns.Add(column =>
        {
            column.FieldName = "Unbound";
            column.Caption = "Action";
            column.UnboundType = DevExpress.Data.UnboundColumnType.Object;
            column.EditFormSettings.Visible = DevExpress.Utils.DefaultBoolean.True;
            column.ReadOnly = false;

            column.ColumnType = MVCxGridViewColumnType.ButtonEdit;
            column.SetDataItemTemplateContent((c) =>
            {

                Html.DevExpress().Button(b =>
                {
                    b.Name = "btnVE" + c.KeyValue;
                    b.Text = "V/E";
                    b.UseSubmitBehavior = false; // prevent default submit action
                    b.EnableClientSideAPI = true; // add this line if not sure
                    b.ClientSideEvents.Click = string.Format("function(s, e) {{ window.location = '{0}?key={1}'; }}",
                            DevExpressHelper.GetUrl(new { Controller = "ViewPrincipal", Action = "EditRecord" }),
                            c.KeyValue.ToString());
                }).GetHtml();
            });
        });

错误

The parameters dictionary contains a null entry for parameter 'id' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult EditRecord(Int32)' in 'WMS_Web.Controllers.FileMaintenance.ViewPrincipalController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter. Parameter name: parameters

Answer 1

您没有在 DevExpressHelper.GetUrl 方法中提供参数 id。你需要设置它。在下面的示例中，我将值设置为 1。我不明白为什么在要求的 "id" 时在查询字符串中放置 "key"。将 "key" 更改为 "id" 应该也可以解决您的问题。

settings.Columns.Add(column =>     
{
        column.FieldName = "Unbound";
        column.Caption = "Action";
        column.UnboundType = DevExpress.Data.UnboundColumnType.Object;
        column.EditFormSettings.Visible = DevExpress.Utils.DefaultBoolean.True;
        column.ReadOnly = false;

        column.ColumnType = MVCxGridViewColumnType.ButtonEdit;
        column.SetDataItemTemplateContent((c) =>
        {

            Html.DevExpress().Button(b =>
            {
                b.Name = "btnVE" + c.KeyValue;
                b.Text = "V/E";
                b.UseSubmitBehavior = false; // prevent default submit action
                b.EnableClientSideAPI = true; // add this line if not sure
                b.ClientSideEvents.Click = string.Format("function(s, e) {{ window.location = '{0}'; }}",
                        DevExpressHelper.GetUrl(new { Controller = "ViewPrincipal", Action = "EditRecord", id = c.KeyValue.ToString() }));
            }).GetHtml();
        });
    });

ASP.NET MVC调用控制器方法DevExpress

ASP.NET MVC Calling Controller Method DevExpress

c#

asp.net-mvc

devexpress