可变变化？ [英] Is Variable Changing?
本文介绍了可变变化？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
为什么这只返回item1类型？
Why does this return only item1 types?
foreach (DataRow dataRow in dt.Rows)
{
if (dataRow["Column1"].ToString().Contains(["ExampleString"])
{
listBox1.Items.Add(dataRow["Column1"] + " " + dataRow["Column2"] + " " + dataRow["Column3"] + " " + dataRow["Column4"]);
}
}
//the above code works perfectly and returns only the rows containing the "ExampleString"
// if i try to use a SelectedText value from a combobox as a string to replace the "ExampleString", (as shown below),the listbox populates with ALL of the rows, not just the ones with the "ExampleString".
string strFromCombobox = comboBox1.SelectedText;
foreach (DataRow dataRow in dt.Rows)
{
if (dataRow["Column1"].ToString().Contains(strFromCombobox)
{
listBox1.Items.Add(dataRow["Column1"] + " " + dataRow["Column2"] + " " + dataRow["Column3"] + " " + dataRow["Column4"]);
}
}
推荐答案
试试这个：
string strFromCombobox = comboBox1.SelectedValue.ToString（）;
string strFromCombobox = comboBox1.SelectedValue.ToString();
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