1, non-null data validation control Requiredfiledvalidator.
Property: Controltovaliata refers to which control the validation control validates. For example, verify the ID property of the TextBox control Txtpwd, as long as the requiredfiledvalidator. The Controltovalidata property of the control is set to Txtpwd. Code: this. Requiredfiledvalidator1.controltovalidata= "Txtpwd";
ErrorMessage property: Used to specify the error message text that is displayed when the Requiredfiledvalidator control is used in a page. Code: this. Requeiredfiledvalidator1.errormessage= "*";
2. Data Comparison validation controls
CompareValidator:
Important attribute: ControlToCompare Specifies the ID of the control for which you want to compare values. For example, verify the ID two times.
This.comparevalidator1.controltocompare= "Txtpwd";
This.comparevalidator1.controltovalidate= "" Txtrepwd:
Operator property: The action that is performed when the validation occurs. For example, verify that you entered the password and re-enter the password consistently.
this.comparevalidator1.operator=validationcompareoperator.equal;
Type property: Specifies the data type of the two values to be compared, such as verifying the data type of the two
This ... type=validationdatatype.string;
ValueToCompare Property: Specifies the value to compare.
<title>Data validation Technology</title></Head><Body> <formID= "Form1"runat= "Server"> <Div> <H2>Data validation Technology</H2> <H3>Non-null data validation</H3> <Div> <Asp:labelID= "Lab"Text= "User Information"runat= "Server" ></Asp:label><BR/><BR/> <Asp:labelID= "Name"Text= "Name:"runat= "Server" ></Asp:label> <Asp:textboxID= "Txtname"runat= "Server" ></Asp:textbox> <Asp:requiredfieldvalidatorID= "Redfile"runat= "Server"ControlToValidate= "Txtname"SetFocusOnError= "true"errormessage= "Name cannot be empty" ></Asp:requiredfieldvalidator><BR/><BR/><BR/> <Asp:buttonID= "Btok"runat= "Server"Text= "Verify"OnClick= "Btok_click"style= "height:21px" /> </Div> </Div> <Div> <HR/> <H3>Data comparison control validation</H3> <var> <Asp:labelID= "Labtxt"runat= "Server"Text= "User Information"BorderStyle= "NotSet"></Asp:label><BR/> </var> <Asp:labelID= "LAB2"runat= "Server"Text= "Name:"></Asp:label> <Asp:textboxID= "Lab3"runat= "Server" ></Asp:textbox> <Asp:requiredfieldvalidatorID= "RequFlie2"runat= "Server"errormessage= "Name cannot be empty"SetFocusOnError= "true"ControlToValidate= "Txtname"></Asp:requiredfieldvalidator><BR/><BR/> <Asp:labelID= "LAB4"runat= "Server"Text= "Password:" ></Asp:label> <Asp:textboxID= "Txtpwd"runat= "Server"TextMode= "Password" ></Asp:textbox><BR/><BR/> <Asp:labelID= "Lab5"runat= "Server"Text= "Confirm Password:"></Asp:label> <Asp:textboxID= "Txtrepwd"runat= "Server"TextMode= "Password" ></Asp:textbox> <Asp:comparevalidatorID= "Comval"runat= "Server"ControlToValidate= "Txtrepwd"ControlToCompare= "Txtpwd"errormessage= "The confirmation password does not match the original password"></Asp:comparevalidator><BR/><BR/> <Asp:buttonID= "Btncheck"runat= "Server"Text= "Verify 2"OnClick= "btnCheck_Click" /> </Div> </form>
Data validation Controls
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