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Problem in HtmlTextWriterAttribute.Value

Posted on 2009-05-13
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Last Modified: 2013-11-08
Hi

I have created a class inherited from TextBox class

In that class I have override the Render function

see code

Now I am using this control dll in some other project

When I set the property MTBText I am not able to see the value on the webpage

Am I missing something
protected override void Render(HtmlTextWriter output)

        {

            output.RenderBeginTag(HtmlTextWriterTag.Input);

            output.AddAttribute(HtmlTextWriterAttribute.Type, "text");

            output.AddAttribute(HtmlTextWriterAttribute.Name, this.ClientID);

            output.AddAttribute(HtmlTextWriterAttribute.Value, MTBText);            

            output.RenderEndTag();

}

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Comment
Question by:KaranGupta
  • 4
  • 3
7 Comments
 
LVL 12

Expert Comment

by:GuitarRich
ID: 24373121
can you post your MTBText property definition?
0
 

Author Comment

by:KaranGupta
ID: 24373131
here we go
 protected override void Render(HtmlTextWriter output)

        {

            output.RenderBeginTag(HtmlTextWriterTag.Input);

            output.AddAttribute(HtmlTextWriterAttribute.Type, "text");

            output.AddAttribute(HtmlTextWriterAttribute.Id, MTBID);

            output.AddAttribute(HtmlTextWriterAttribute.Value, MTBText);

            output.RenderEndTag();

           // base.Render(output);           

           
 

        }
 
 

        /// <summary>

        /// Text

        /// </summary>

        public string MTBText

        {

            get;

            set;

        }

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LVL 12

Expert Comment

by:GuitarRich
ID: 24373154
in the MTBText property are you using the viewstate? kind of like this:
		[Bindable(true)]

		[Category("Appearance")]

		[DefaultValue("")]

		[Localizable(true)]

		public string Text

		{

			get

			{

				String s = (String)ViewState["Text"];

				return ((s == null) ? "[" + this.ID + "]" : s);

			}
 

			set

			{

				ViewState["Text"] = value;

			}

		}

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Author Comment

by:KaranGupta
ID: 24373181
This definition of Text was given earlier when I created the project

But I have commented the definition
0
 
LVL 12

Expert Comment

by:GuitarRich
ID: 24373218
yes - but does your MTBText property work in the same way so that the value is stored in the viewstate properly and can be rendered? If you put a break point in your rendering code does the MTBText property have a value?
0
 

Author Comment

by:KaranGupta
ID: 24373278
Hi

I am attaching the whole code

Please look into it

And this is how I am calling this control

<FTB:MultiPurposeTextControl MTBErrorMessageControlType="VALIDATIONSUMMARY" MTBText="karan" MTBID="test" runat="server"></FTB:MultiPurposeTextControl>
using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Linq;

using System.Text;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;
 

namespace MultiPurposeTextBox

{

    [DefaultProperty("Text")]

    [ToolboxData("<{0}:ServerControl1 runat=server></{0}:ServerControl1>")]

    public class MultiPurposeTextControl : WebControl

    {

        

        protected override void Render(HtmlTextWriter output)

        {

            output.RenderBeginTag(HtmlTextWriterTag.Input);

            output.AddAttribute(HtmlTextWriterAttribute.Type, "text");

            output.AddAttribute(HtmlTextWriterAttribute.Id, MTBID);

            output.AddAttribute(HtmlTextWriterAttribute.Value, MTBText);

            output.RenderEndTag();

           // base.Render(output);           

           
 

        }
 
 

        [Bindable(true)]

        [Category("Appearance")]

        [DefaultValue("")]

        [Localizable(true)]

        public string MTBText

        {

            get

            {

                String s = (String)ViewState["Text"];

                return ((s == null) ? "[" + this.ID + "]" : s);

            }
 

            set

            {

                ViewState["Text"] = value;

            }

        }

      

        /// <summary>

        /// ID

        /// </summary>

        public string MTBID

        {

            get;

            set;

        }
 

        /// <summary>

        ///   Property to specify whether you want to 

        ///   give error message to a label or want to

        ///   integrate it with validation summary

        /// </summary>       

        public MTBErrorMessageControl MTBErrorMessageControlType

        {

            get;

            set;

        }
 
 

        /// <summary>

        ///   Property to specify what sort of validation

        ///   you want 

        /// </summary> 

        public MTBValidation MTBValidationType

        {

            get;

            set;

        }
 

        /// <summary>

        /// Enums for different Types of validation

        /// </summary>

        public enum MTBValidation

        {

            INTEGER,

            ALPHABET

        }
 

        /// <summary>

        /// Enums for different Types of controls

        /// on which you want to show error message

        /// </summary>

        public enum MTBErrorMessageControl

        {

            LABEL,

            VALIDATIONSUMMARY

        }
 

    }

}

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LVL 12

Accepted Solution

by:
GuitarRich earned 500 total points
ID: 24373382
ok - this is what I have got - is this closer. I realised the mistake with the MTBText, you need to add the attributes before the RenderBeginTag call - sorry got it the wrong way wrond earlier.
		/// <summary>

		/// Enums for different Types of controls

		/// on which you want to show error message

		/// </summary>

		public enum MTBErrorMessageControl

		{

			LABEL,

			VALIDATIONSUMMARY

		}
 
 

		[Bindable(true)]

		[Category("Appearance")]

		[DefaultValue("")]

		[Localizable(true)]

		public string MTBText

		{

			get

			{

				String s = (String)ViewState["MTBText"];

				return ((s == null) ? "[" + this.ID + "]" : s);

			}
 

			set

			{

				ViewState["MTBText"] = value;

			}

		}
 

		/// <summary>

		///   Property to specify whether you want to 

		///   give error message to a label or want to

		///   integrate it with validation summary

		/// </summary>       

		public MTBErrorMessageControl MTBErrorMessageControlType

		{

			get

			{

				if (ViewState["MTBErrorMessageControlType"] == null)

				{

					return MTBErrorMessageControl.LABEL;

				}

				else

				{

					MTBErrorMessageControl s = (MTBErrorMessageControl)ViewState["MTBErrorMessageControlType"];

					return s;

				}

			}
 

			set

			{

				ViewState["MTBErrorMessageControlType"] = value;

			}

		}
 
 

		protected override void Render(HtmlTextWriter writer)

		{

			//base.Render(writer);

			writer.RenderBeginTag(HtmlTextWriterTag.Span);
 

			writer.AddAttribute(HtmlTextWriterAttribute.Type, "text");

			writer.AddAttribute(HtmlTextWriterAttribute.Name, this.ClientID);

			writer.AddAttribute(HtmlTextWriterAttribute.Value, this.Text);

			writer.RenderBeginTag(HtmlTextWriterTag.Input);
 

			writer.RenderEndTag();
 

			if (this.MTBText != string.Empty && this.MTBErrorMessageControlType == MTBErrorMessageControl.LABEL)

			{

				writer.AddAttribute(HtmlTextWriterAttribute.For, this.ClientID);

				writer.RenderBeginTag(HtmlTextWriterTag.Label);
 

				writer.Write(this.MTBText);

				writer.RenderEndTag();

			}
 

			writer.RenderEndTag(); // span

		}

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