asked on

Breathtakingly dumb question: Where to put custom code in C# Windows app?

Dear Experts,

I'm trying to customize a drag-and-drop-created C# app for the first time. The app has a DataGridView in "Form1.Designer". Before the table is shown, I would like to make invisible all columns that have no data in them (all nulls). Someone (anyoneis) has kindly suppied me with the code to do that. However, I DON'T KNOW WHERE TO PUT IT!

If I include it in Form1.Designer, I find the data isn't actually loaded into the table yet, so no "rows" are found. (I also get a "Don't put anything here" message later...") And I can't put it in "program.cs", because it's static.

I might mention that anyonis's code referenced the table directly, and I need to reference the DataGridView (I think), so maybe that is my mistake...

I know this may be the dumbest question in the history of Experts Exchange, but where do I put my own code in this case?

Thanks,
BrianMc1958

BrianMc1958

ASKER

BTW, I'm in VS2005.

ASKER CERTIFIED SOLUTION

topdog770

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

BrianMc1958

ASKER

Well, I did try adding it here within Form1.Designer, near the bottom:

this.Load += new System.EventHandler(this.Form1_Load);

// BEGIN MY CODE
for (int i = 0; i < dataGridView1.Columns.Count; i++)
{
dataGridView1.Columns[i].Visible = false;
}

System.Console.Out.WriteLine("Rows:" + this.dataGridView1.Rows.Count);
for (int i = 0; i < this.dataGridView1.Rows.Count; i++)
{
System.Console.Out.WriteLine("i" + i);
for (int j = 0; j < this.dataGridView1.Columns.Count; j++)
{
System.Console.Out.WriteLine("j" + j + " val:" + this.dataGridView1[i, j]);
if (this.dataGridView1[i, j] != null)
dataGridView1.Columns[j].Visible = true;
}
}
// END MY CODE
((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.fTG_Total_2DataSet)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.mlaKYCParmBindingSource)).EndInit();
this.ResumeLayout(false);

However, it still says there are zero rows.

(BTW, I will accept an answer of "Read The !@#$%^ Manual" here if necessary...)

BrianMc1958

ASKER

Above code is in InitializeComponent, in the "#region Windows Form Designer generated code".

BrianMc1958

ASKER

I have figured how to move my code to:

dataGridView1_DataBindingComplete

and it now seems to be processing some rows, anyway. However, I think my syntax is wrong for specifying "current cell". It's giving my an invalid index message the first time it hits:

System.Console.Out.WriteLine("j" + j + " val:" + this.dataGridView1[i, j]);

Is that syntax right ([i,j]) for specifying "row,col" in a DataGrid View?