pass data as a string to other form

sairam

I have an MDI form with two forms in it. When i click a button in MDI form, my form F1 Opens.

My question is given below.

When i click a button B1 in formF1, it opens the other form F2. i did this. IN this form F2, there is a combobox with a set of values.

My task is when i select a value in the combox and click the button B2 enclosed in that form, the value selected should go as a string in FOrm F1. Since i am new to dot net, Can you please take some time and give me a sample code so that i customize myself.

Thanks

4 Replies

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Guest User17y ago
Accepted answer
In parent form "MDIParent1", which has a button "btnShowF1":

        private void btnShowF1_Click(object sender, EventArgs e)
        {
            F1 f1 = new F1();
            f1.MdiParent = this;
            f1.Show();
        }

In form F1, which has a button "btnShowF2" and a label "lblState":

        private void btnShowF2_Click(object sender, EventArgs e)
        {
            F2 f2 = new F2();
            f2.MdiParent = this.MdiParent;
            f2.Show();
        }

        public void setLabel(string labelText)
        {
            this.lblState.Text = labelText;
        }

In form F2 which has a combo box named "cmbStates":

        private void cmbStates_SelectedIndexChanged(object sender, EventArgs e)
        {
            for (int i = 0; i < this.MdiParent.MdiChildren.Length; i++)
            {
                if (this.MdiParent.MdiChildren[i] is F1)
                {
                    F1 f1 = (F1)(this.MdiParent.MdiChildren[i]);
                    f1.setLabel(cmbStates.Text);
                    break;
                }
            }
        }

When you select a new value in F2's combo, it will change the label text on the first F1 form it finds (since it's an MDI form, you could have more than one F1!) If you remove the "break" statement, the label in all F1's will be updated.
Guest User17y ago
Following from my example... my MDI form has a StatusStrip control that contains a ToolStripStatusLabel control named toolStripStatusLabel. I added this function to the MDI form:

        public void setStatusText(string newStatus)
        {
            this.toolStripStatusLabel.Text = newStatus;
        }

Then, in form F2, I added the following code to the combo box's SelectedIndexChanged event handler shown above:

            if (this.MdiParent is MDIParent1)
                ((MDIParent1)this.MdiParent).setStatusText(cmbStates.Text);

Now when you select a different value in F2's combo box, you should see the label on F1 change and also see the status bar text on the MDI form change to the same value.
Pierre Cornelissen17y ago
Thanks for this valuable answer. However I'd like to know how to pass a value BACK to the MDIParent from a Child form e.g., I'd like to display a message based on an action on the Child form in the Statusbar of the the MDIParent form.

Thanks

Pierre
Niradhip Chakraborty17y ago
check out the following URL:

1.http://bytes.com/topic/net/answers/629914-how-do-i-pass-value-one-form-another-form-net-windows-application
2.http://bytes.com/groups/net-c/650115-how-call-event-another-form-c-windows-forms
3.http://www.c-sharpcorner.com/UploadFile/alindag/HowToPassValuesBetweenWindowsForms.htm02242006061520AM/HowToPassValuesBetweenWindowsForms.htm.aspx?ArticleID=519479e8-d064-44a1-84b1-5ffc033dbbf3