檢查列中的單元格是否具有相同的值

Question

我正在創建startlist，因此顯然我想阻止具有相同起始號碼的競爭對手。我有用於輸入值的文本框與保存按鈕轉換爲DataGridView表。像這樣：

bool CheckFiledIsEmpty() 
{ 
    if (textStN.Text == string.Empty || 
     textN.Text == string.Empty || 
     textSN.Text == string.Empty || 
     textC.Text == string.Empty || 
     textYB.Text == string.Empty) 
     return false; 
    else 
     return true; 
} 

private void buttonSave_Click(object sender, EventArgs e) 
{ 
    if (CheckFiledIsEmpty()) 
    { 
     string Column1 = textStN.Text; 
     string Column2 = textN.Text; 
     string Column3 = textSN.Text; 
     string Column4 = textC.Text; 
     string Column5 = textYB.Text;      
     string[] row = { Column1, Column2, Column3, Column4, Column5 }; 
     dataGridView1.Rows.Add(row); 
     textStN.Text = ""; 
     textN.Text = ""; 
     textSN.Text = ""; 
     textC.Text = ""; 
     textYB.Text = ""; 
    } 
    else 
    { 
     MessageBox.Show("Input all information about competitor!"); 
    } 
} 

我想，當保存按鈕被擊中，在Column1（起始號碼文本框textStN）前值進行檢查，如果有相同值的誤差盒狀：「競爭者那個起始號碼已經存在了！「

感謝您的幫助和對我的英語感到抱歉。

Answer 1

如下修改代碼：

bool CompetitorAlreadyExist() 
{ 
    foreach (DataGridViewRow row in dataGridView1.Rows) 
    { 
     foreach (DataGridViewCell cell in row.Cells) 
     { 
      if (cell.ColumnIndex == 0) // set your column index 
      { 
       // do your stuff here… i.e., compare `textStN.Text` with all values 
       // in column start # and return true or false 
      } 
     } 
    } 
} 

private void buttonSave_Click(object sender, EventArgs e) 
{ 
    if (CheckFiledIsEmpty() && CompetitorAlreadyExist()) 
    { 
     string column1 = textStN.Text; 
     string column2 = textN.Text; 
     string column3 = textSN.Text; 
     string column4 = textC.Text; 
     string column5 = textYB.Text;      
     string[] row = { column1, column2, column3, column4, column5 }; 
     dataGridView1.Rows.Add(row); 
     textStN.Text = ""; 
     textN.Text = ""; 
     textSN.Text = ""; 
     textC.Text = ""; 
     textYB.Text = ""; 
    } 
    else 
    { 
     MessageBox.Show("Input all information about competitor!"); 
    } 
} 

希望它可以幫助。