Description:-
In this example we explain that how to validate Date
format in dd/mm/yyyy in asp.net C#
backend code at runtime validation using Regex validator provided by .Net
Framework.
We all know very to validate any like Date, only number, required validation, and Range validation is easily at client side but my problem is that it will be validated by runtime.
For example in my real project in which one form name like create report in which form one is dropdown and its contain three items like string, integer and Date. And second control is textbox and one submit button. Now condition is that if user select string item from dropdown list then only string are allow to enter in below Textbox control same like if user select Date item from dropdown list then only user allow to enter Date only and it also in dd/mm/yy format and same for Integer items. So it is difficult task to validate at runtime for me at first time. And then finally I got the solution are described bellows.
We all know very to validate any like Date, only number, required validation, and Range validation is easily at client side but my problem is that it will be validated by runtime.
For example in my real project in which one form name like create report in which form one is dropdown and its contain three items like string, integer and Date. And second control is textbox and one submit button. Now condition is that if user select string item from dropdown list then only string are allow to enter in below Textbox control same like if user select Date item from dropdown list then only user allow to enter Date only and it also in dd/mm/yy format and same for Integer items. So it is difficult task to validate at runtime for me at first time. And then finally I got the solution are described bellows.
Code.aspx.cs:-
using System;
using
System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using
System.Web.UI.WebControls;
using
System.Text.RegularExpressions;
namespace kiritblog
{
public partial class validation : System.Web.UI.Page
{
protected
void btnSubmit_Click(object
sender, EventArgs e)
{
GridView
grow = this.FindControl("Gridview1") as GridView;
TextBox
txtDisplayName = grow.FindControl("txtDisplayName")
as TextBox;
DropDownList
drpDatatype = grow.FindControl("drpDatatype")
as DropDownList;
DropDownList
drpRequiresInput = grow.FindControl("drpRequiresInput")
as DropDownList;
TextBox
txtMaxLength = grow.FindControl("txtMaxLength")
as TextBox;
DropDownList
drpDefaultValueType = grow.FindControl("drpDefaultValueType")
as DropDownList;
TextBox
txtDefaultValue = grow.FindControl("txtDefaultValue")
as TextBox;
//commented
by kirit
if
(drpDatatype.SelectedValue.ToString().Equals("DateTime"))
{
if
(!drpDefaultValueType.Text.Equals("Null"))
{
var
match = Regex.Match(txtDefaultValue.Text, @"^(((0?[1-9]|1[012])-(0?[1-9]|1\d|2[0-8])|(0?[13456789]|1[012])-(29|30)|(0?[13578]|1[02])-31)-(19|[2-9]\d)\d{2}|0?2/29-((19|[2-9]\d)(0[48]|[2468][048]|[13579][26])|(([2468][048]|[3579][26])00)))$");
if
(!match.Success)
{
trMessage.Show(lblMessage.ReportError("Please
enter Date mm-dd-yyyy Properly."));
return false;
}
}
}
else
if (drpDatatype.SelectedValue.ToString().Equals("Integer"))
{
if
(!drpDefaultValueType.Text.Equals("Query"))
{
var
match = Regex.Match(txtDefaultValue.Text, @"^[0-9]*$");
if
(!match.Success)
{
trMessage.Show(lblMessage.ReportError("Please
enter only Number value in Textbox."));
return false;
}
}
}
else
if (drpDatatype.SelectedValue.ToString().Equals("String"))
{
if
(drpDefaultValueType.Text.Equals("SpecifiedValue"))
{
if
(txtDefaultValue.Text.Trim().Equals(""))
{
trMessage.Show(lblMessage.ReportError("Please enter value in Textbox."));
return false;
}
}
}
}
}
}
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