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  1. PO
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    <p>That error is thrown because Form3 has no default Constructor anymore since you defined one with a <code>string</code> parameter. you need to create a default Constructor like this <code>public Form3(){}</code>. </p> <p>But Instead of doing all this mess you can handle events of you both forms. Like if Form1 is the main Form then something like this can be done:</p> <p>In Form1</p> <pre><code>public string textFromForm2 = string.Empty; private void openform3_Click(object sender, EventArgs e) { Form3 f3 = new Form3(); f3.Controls["received_from_form1_textbox"].Text = textFromForm2 ; f3.Show(); } private void OPENFORM2_Click(object sender, EventArgs e) { Form2 f2 = new Form2(); //I am binding the event to a handler which will save text //you should check for null for f2.Controls returned any thing or not, i am leaving it for now f2.Controls["send_to_form1_button"].Click += (s,e)=&gt;{ txtFromForm2 = f2.Controls["form2_textbox"].Text; }; f2.Show(); } </code></pre> <p><strong>Update</strong></p> <p>if you don't want to use Lambadas then bind events like this:</p> <p>First you will need a reference to the Form2 so declare in your class like this:</p> <pre><code>Form2 f2; </code></pre> <p>then bind the event (in place of the lambada i have given before)</p> <pre><code>f2.Controls["send_to_form1_button"].Click += new Eventhandler(click_handler); </code></pre> <p>then somewhere in Form1 class:</p> <pre><code>protected void click_handler(object sender, EventArgs e) { if(f2 != null) txtFromForm2 = f2.Controls["form2_textbox"].Text; } </code></pre> <p>similarly for Form3.</p>
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    1. POpassing data between 3 windows forms in visual studio using C#
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    1. USShekhar_Pro
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    1. CO@Shekhar_Pro: dear sir, can you explain me the binding the event code, i dont know whats happening in it? i copied it in my code, but its giving syntax errors?
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    2. COi have used Lambda and anonymous delegates to bind event.. if you are using .net 2.0 (Whre they are not supported) then you can do usual binding i have explained in my update
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    3. CO@Shekhar_Pro: sir, my problem hasn't been solved yet, please tell me where to put this code which you have given, am confused totally, am not able to implement a simple process of sending a textbox text from Form2 to Form1 and then from Form1 to form3, FORM1 being the main parent form.
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