GridWeb中的自定义验证

可能的使用场景

Aspose.Cells.GridWeb提供了比在单元格验证api中正常定义的更多类型的验证。 the normal validation type in cells :https://docs.aspose.com/cells/net/data-validation/

the normal validation usage in GridWeb demo: https://github.com/aspose-cells/Aspose.Cells-for-.NET/blob/master/Examples_GridWeb/GridWeb.Net4/CSharp/Miscellaneous/Common/DataValidation.aspx.cs

here we can check GridValidationType: https://reference.aspose.com/cells/net/aspose.cells.gridweb.data/gridvalidationtype/

下面是我们可以在GridWeb中使用的扩展验证。

GridValidationType.DropDownList

代码：

            // ExStart:AddDropDownListValidation
            // Accessing the cells collection of the worksheet that is currently active
            GridWorksheet sheet = GridWeb1.WorkSheets[GridWeb1.ActiveSheetIndex];

            // Access "B1" cell and add some text
            GridCell cell = sheet.Cells[0, 1];
            cell.PutValue("Select Degree:");

            // Accessing "C1" cell
            cell = sheet.Cells[0, 2];

            // Creating DropDownList validation for the "C1" cell
            var validation = cell.CreateValidation(GridValidationType.DropDownList, true);

            // Adding values to DropDownList validation
            var values = new System.Collections.Specialized.StringCollection();
            values.Add("Bachelor");
            values.Add("Master");
            values.Add("Doctor");
            validation.ValueList = values;

结果:

GridValidationType.FreeList

代码：

             GridValidation validationOfList = this.GridWeb1.ActiveSheet.Validations.Add("c1");
             validationOfList.ValidationType = GridValidationType.DropDownList;
             StringCollection  C10List = new StringCollection();
             C10List.Add("Fortran");
             C10List.Add("Pascal");
             C10List.Add("C++");
             C10List.Add("Visual Basic");
             C10List.Add("Java");
             C10List.Add("C#");
             validationOfList.ValueList = C10List;

结果:

GridValidationType.CustomExpression

代码：

             var sheet = GridWeb1.ActiveSheet;
             GridCell cell = sheet.Cells["B1"];
             cell.PutValue("Please enter Date in cell C3 e.g. 2018-02-18");

             //Access cell B3 and add the Date Pattern
             cell = sheet.Cells["B3"];
             cell.PutValue("Date (yyyy-mm-dd):");

             // Access cell C3 and add to it custom expression validation to accept dates in yyyy-mm-dd format
             cell = sheet.Cells["C3"];
             var validation = cell.CreateValidation(GridValidationType.CustomExpression, true);
             validation.RegEx = @"\d{4}-\d{2}-\d{2}";

             //Set the column widths
             sheet.Cells.SetColumnWidth(1, 40);
             sheet.Cells.SetColumnWidth(2, 30);
             //Set style number
             sheet.Cells["C3"].SetNumberType((int)NumberType.EasternDate5);
	     // Assigning the name of JavaScript function to OnCellErrorClientFunction property of GridWeb
             GridWeb1.OnCellErrorClientFunction = "ValidationErrorFunction";

在客户端页面中添加JavaScript函数

         function ValidationErrorFunction()
        {
            // Showing an alert message where "this" refers to GridWeb
            console.log(this.id + ": Please correct your input error.");
        }

结果: 输入无效值后

GridValidationType.Boolean

代码：

 //add boolean validation at d1
  GridWeb1.ActiveSheet.Cells[0, 3].CreateValidation(GridValidationType.Boolean,true);

结果: 输入无效值后

输入 true 值后

GridValidationType.DateTime

代码：

  //add DateTime validation at d3
  GridWeb1.ActiveSheet.Cells[2, 3].CreateValidation(GridValidationType.DateTime, true);

结果:

GridValidationType.CheckBox

代码：

   //add checkbox validation at d1
   GridWeb1.ActiveSheet.Cells[0, 3].CreateValidation(GridValidationType.CheckBox,true);

结果:

GridValidationType.CustomFunction

代码：

      //add boolean validation at d4
     GridValidation customValidation= GridWeb1.ActiveSheet.Cells[3, 3].CreateValidation(GridValidationType.CustomFunction, true);
     customValidation.ClientValidationFunction = "MyClientValidation";

在客户端页面中添加JavaScript函数

        function MyClientValidation(source, value)
        {
            if (Number(value) > 10000)
                return true;
            else
                return false;
        }

结果：在单元格d4输入无效数值后

GridValidationType.CustomServerFunction

代码：

  //define server side validation class which implment GridCustomServerValidation and ISerializable
  // GridCustomServerValidation and ISerializable are the required interface to be done
  class myservervalid : GridCustomServerValidation, ISerializable
    {
        string s;
       void ISerializable.GetObjectData(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context)
       {

           info.AddValue("s",s);
       }
       protected myservervalid(SerializationInfo info, StreamingContext context)
       {
           s= info.GetString("s");
       }

        public myservervalid()
        {
        }

        public string Validate(GridWorksheet sheet, int row, int col, string value)
        {
            if (row % 2 == 1)
            {
                return "not passed";

            }

            else
            {
                return "";
            }
        }
    }

        //add CustomServerFunction validation at G5 to G8
         GridValidation val = this.GridWeb1.ActiveSheet.Validations.Add(new GridCellArea(5,6, 8, 6));
         val.ValidationType = GridValidationType.CustomServerFunction;
         val.ServerValidation = new myservervalid();
         val.ClientValidationFunction=("ValidationErrorClientFunctionCallback");
         val.ErrorMessage=("error message is here");
         val.ErrorTitle=("this is error title");

在客户端页面中添加JavaScript函数

        var lastselectvalue = null;
        var localvalue = {};
        function ValidationErrorClientFunctionCallback(cell,msg)
        {
            //Get the error message string.
            var errmsg1 = getattr(cell, "errmsg");

            //Show the error message in the client dialog.
            console.log(errmsg1);

            //Showing an alert message where "this" refers to GridWeb
            alert(this.id + "----> " + msg + " Previous value will be restored.");
            $("#errmsg").text(msg);
            console.log("Selected cell:" + " row:" + this.getCellRow(cell) + ",col:" + this.getCellColumn(cell));

            //Get the GridWeb.
            var who = this;

            //Restore to valid value/previous value. 
            who.setValid(cell);
            var key = this.acttab + "_" + this.getCellRow(cell) + "_" + this.getCellColumn(cell);
            lastselectvalue = localvalue[key];
            setInnerText(cell.children[0], lastselectvalue);
        }

结果：在单元格g6输入数值后