当对datagridview进行C＃过滤时，如何将textbox.Text中的文本添加到datagridview.CurrentCell中？

Question

I'm not really good at coding and after doing countless research, I cannot figure this one out.

Basically what I want to achieve is to update a specific cell using a textBox. I wrote the following code based on other postings (NOTE:The DataBinding was done using the VS wizard):

    int i;

    private void textBox_TextChanged(object sender, EventArgs e)
    {
        i = dataGridView1.CurrentCell.RowIndex;
    } 

    private void button1_Click(object sender, EventArgs e)
    {
        myDatabaseDataSet.Tables[0].Rows[i][5] = textBox.Text;
    }

The problem with the above code is that, when I filter dataGridView1 with this code:

    private void comboName_SelectedIndexChanged(object sender, EventArgs e)
    {
        DataTableCollection tables = myDatabaseDataSet.Tables;
        DataView view1 = new DataView(tables[0]);
        BindingSource source1 = new BindingSource();
        source1.DataSource = view1;
        dataGridView1.DataSource = source1;
        source1.Filter = "Name='" + comboName.Text.Replace("'", "''") + "'";
    }

The code will update the dataGridView1.CurrentCell.RowIndex as expected. The big problem here is that the code under button1_Click does not see the filtering, hence it would write -for example- in row[1] of the unfiltered table rather than in row[1] of the filtered table.

Any help would be greatly appreciated.

Answer 1

I don't quite understand your question clearly

Do you mean that the filter doesn't apply when you changed the cell text?

Try adding this to the button click event

(myDatabaseDataSet.DataSource as DataTable).DefaultView.RowFilter = "Name='" + comboName.Text.Replace("'", "''") + "'";

Answer 2

Base on your code, you create a copy of the original table. Instead of updating the filtered table, you update the original table myDatabaseDataSet.Tables[0].Rows[i][5] = textBox.Text; .

The fix is obvious, I will give you some idea here...

private void button1_Click(object sender, EventArgs e)
{
    myDatabaseDataSet.Tables[0].Rows[i][5] = textBox.Text; // You need to modify this to know which is the correct row to update.
    // Update the filtered table every time you update the main table.
    DataTableCollection tables = myDatabaseDataSet.Tables;
    DataView view1 = new DataView(tables[0]);
    BindingSource source1 = new BindingSource();
    source1.DataSource = view1;
    dataGridView1.DataSource = source1;
    source1.Filter = "Name='" + comboName.Text.Replace("'", "''") + "'";
}

Good Luck.

Answer 3

first off, you're gonna have to find a unique column that is unique for every row. then you can select the dataRow of your dataset based on that like this :

int uniqueIDFromDatagrid = (int)dataGridView1.Rows[dataGridView1.CurrentCell.RowIndex].Cells[uniqueIdentifierColumn.Index].Value;
DataRow targetRow = myDataSet.Tables[0].Rows.OfType<DataRow>().First(x => (int)x["uniqueIdentifierColumn"]== uniqueIDFromDatagrid);

and then you can update the source on the right row and column like this :

targetRow[5] = textBox1.Text;